MF研究者総覧

Researcher Database

Advance
Researchers' Page on researchmap
Last Updated :2024/10/27

Researcher Profile and Settings

Master

Affiliation (Master)

  • Research Faculty of Agriculture　Fundamental AgriScience Research　Forest Science

Affiliation (Master)

  • Research Faculty of Agriculture　Fundamental AgriScience Research　Forest Science

researchmap

Profile and Settings

Profile and Settings

  • Name (Japanese)

    Saito

  • Name (Kana)

    Hideyuki

  • Name

    200901041311738735

Alternate Names

Achievement

Research Interests

  • florigen   Floral initiation   epigenomics   transcriptome   Omics   ブナ   遺伝子発現   ストレス診断   光合成   RuBisCO   サイクリンD遺伝子   細胞肥大   遺伝子発現情報   環境応答   自然環境下   ゲノム生態学   形態形成   海抜高度   個葉面積   クロポプラ   葉サイズ   細胞サイズ   細胞分裂   マイクロアレイ   光合成特性   サイクリン   マクロアレイ   ゲノム生理生態学   ポプラ   個葉サイズ   インドネシア:マレーシア   温暖化効果ガス   森林火災   土壌水分   樹冠形   応用ゲノム科学   環境影響評価・環境政策   林学・森林工学   

Research Areas

  • Environmental science/Agricultural science / Landscape science
  • Environmental science/Agricultural science / Environmental agriculture
  • Environmental science/Agricultural science / Environmental dynamics
  • Life sciences / Systems genomics
  • Life sciences / Genomics
  • Environmental science/Agricultural science / Environmental policy and society
  • Environmental science/Agricultural science / Environmental impact assessment
  • Life sciences / Forest science

Research Experience

  • 2015/04 - Today 北海道大学・大学院農学研究院 基礎研究部門森林科学分野 講師
  • 2012 北海道大学 (連合)農学研究科(研究院) 講師
  • 1999 - 2006 北海道大学大学院農学研究科環境資源科学専攻森林資源科学講座） 助手
  • 1999 - 2006 Research Associate
  • 2006 - 北海道大学大学院農学研究院環境資源科学部門森林資源科学分野造林学 助手
  • 2006 - Research Associate

Education

  •        - 1999  Gifu University
  •        - 1999  Gifu University  Graduate School, Division of Agricltural Sciences
  •        - 1995  Shizuoka University
  •        - 1995  Shizuoka University  Graduate School, Division of Agriculture
  •        - 1993  Shizuoka University  Faculty of Agriculture
  •        - 1993  Shizuoka University  Faculty of Agriculture

Awards

  • 2018/11 北方森林学会 第67回北方森林学会学生ポスター賞
     クマイザサのシュート成長と花成遺伝子に及ぼす施肥の影響 
    受賞者: 斎藤 秀之
  • 2017/11 北方森林学会 第66回北方森林学会学生ポスター賞
     施肥がもたらすブナの着花への効果 
    受賞者: 和田尚之;小林壱德久;斎藤秀之
  • 2017/03 日本森林学会 (2) 第128回日本森林学会学生ポスター賞（生理部門）
     ブナ花成のエピジェネティック制御－DNAメチル化の決定時期と養分の関係－ 
    受賞者: 和田尚之;斎藤秀之;小林壱德久;星野洋一郎
  • 2016/11 北方森林学会 65回北方森林学会学生ポスター賞
     細胞分裂から見たブナ花成の制御時期 
    受賞者: 和田尚之;斎藤秀之;小林壱德久;星野洋一郎
  • 2015/11 北方森林学会 64回北方森林学会学生ポスター賞
     窒素沈着がグイマツ雑種の細根動態に与える影響-リン付加の効果に注目して- 
    受賞者: 藤田早紀;来田和人;斎藤秀之;渋谷正人;小池孝良
  • 2014/11 北方森林学会 第63回北方森林学会学生ポスター賞
     ブナのフロリゲン遺伝子のエピジェネティック制御の可能性 
    受賞者: 小向愛;斎藤秀之;渋谷正人;小池孝良
  • 2013/11 北方森林学会 第62回北方森林学会学生ポスター賞
     摩周湖外輪山ダケカンバ衰退木の水分特性と土壌特性 
    受賞者: 佐久間彬;渡辺誠;若松歩;小林史和;川井田東吾;斉藤秀之;小池孝良
  • 2013/09 (6) Award for poster presentation of "The 4th International Workshop on Wild Fire and Carbon Management in Peat-Forest in Indonesia"
     Guide of kahui reforestation 
    受賞者: Saito Hideyuki;Gaman Sampang;Yuda Prawira;Penyang
  • 2007 第49回土壌物理学会優秀ポスター賞

Published Papers

  • Nobuhito Anzai, Masato Shibuya, Hideyuki Saito, Toshizumi Miyamoto
    Ecosphere 14 (7) 2150-8925 2023/07/09 
    Abstract Species diversity encompasses both richness and evenness, but the interrelationship between these two aspects remains poorly understood. The long‐term dynamics of species diversity were examined in three natural secondary forests in Hokkaido, northern Japan, using permanent plot data gathered over 65–66 years after severe windthrow damage. The relationships among species diversity, species richness, and evenness were analyzed in the context of stand dynamics. Temporal trends in species diversity were unimodal‐shaped in three permanent plots, consistent with the pattern predicted by the intermediate disturbance hypothesis. Species richness and evenness increased following the windthrow, but decreased 27–37 years later in all three plots. In two plots, species diversity was closely associated with species richness and evenness at the early and late successional stages, respectively; in the other plot, species diversity was significantly related to both species richness and evenness in the later stage. The former two plots and the latter one plots differed markedly in terms of the extents of fatal tree damage caused by windthrow. Thus, windthrow severity affected the relationships among diversity, richness, and evenness as succession proceeded in these secondary forests. The tree density, species richness, evenness, and species diversity in all three plots decreased when the basal areas exceeded 18–24 m2/ha, indicating that increased competition among trees affected the temporal trends in these metrics. In conclusion, after a severe disturbance, the relationships among species diversity, richness, and evenness in secondary forests change with succession.
  • WADA Hisayuki, ONODERA Kensuke, TOKUDA Sawako, SAITO Hideyuki, BABA Shunki
    Boreal Forest Research 北方森林学会 68 31 - 34 2186-7526 2020/02 [Refereed]
  • カラマツの枝条形成における長枝化と花芽分化の関係
    馬場俊希, 斎藤秀之, 宮本敏澄, 渋谷正人
    北方森林研究 68 53 - 56 2020/02 [Refereed]
  • Effects of soil nutrient availability and ozone on container‑grown Japanese larch seedlings and role of soil microbes
    KOIKE Takayoshi
    Jour Forestry Res Open access https://link.springer.com/arti  2019/10 [Refereed][Not invited]
  • 開放系オゾン付加施設における落葉分解と中型土壌動物
    野中佳祐, 須磨靖彦, 佐藤冬樹, 斎藤秀之, 渋谷正人, 小池孝良
    北方森林研究 67 43 - 44 2019/02
  • 横山聡子, 菅井徹人, 江口則和, 佐藤冬樹, 斎藤秀之, 渋谷正人, 小池孝良
    北方森林研究 (67) 27‐28  2186-7526 2019/02 [Refereed][Not invited]
  • Unveiling the origin of Quercus serrata subsp. mongolicoides found in Honshu, Japan, by using genetic and morphological analyses
    Aizawa M, Maekawa K, Mochzuki H, Saito H, Harada K, Kadomatsu M, Iizuka K, Ohkubo T
    Plant Species Biology 33 (3) 2018/02 [Refereed][Not invited]
  • 開放系オゾン付加施設に生育させたハルニレ苗の生理応答：虫害に注目して
    岡本昇太, 斎藤秀之, 渋谷正人, 小池孝良
    北方森林研究 67 63 - 64 2018/02 [Refereed][Not invited]
  • 塩類化土壌とオゾン暴露に対するカラマツ属3種苗木の生理応答～クロロフィル蛍光応答に着目して～
    坪奈津実, 汪雁楠, 菅井徹人, 渡部敏裕, 斎藤秀之, 渋谷正人, 小池孝良
    北方森林研究 67 55 - 57 2018/02 [Refereed][Not invited]
  • カラマツコンテナ苗の成長に及ぼす水分環境の影響
    西井あす香, 菅井徹人, 玉井裕, 斎藤秀之, 渋谷正人, 小池孝良
    北方森林研究 67 27 - 30 2018/02 [Refereed][Not invited]
  • 樹木のエピジェネティクスに関する研究動向－ゲノム網羅的なDNAメチル化解析について－
    斎藤 秀之
    北海道の林木育種 61 (1) 37 - 40 2018 [Not refereed][Not invited]
  • 細胞分裂から見たブナ花成の制御時期
    和田尚之, 斎藤秀之, 小林壱德久, 星野洋一郎
    北方森林研究 65 39 - 42 2017 [Refereed][Not invited]
  • Inducible Transposition of a Heat-Activated Retrotransposon in Tissue Culture
    Yukari Masuta, Kosuke Nozawa, Hiroki Takagi, Hiroki Yaegashi, Keisuke Tanaka, Tasuku Ito, Hideyuki Saito, Hisato Kobayashi, Wataru Matsunaga, Seiji Masuda, Atsushi Kato, Hidetaka Ito
    Plant Cell Physiology 58 (2) 375 - 384 2016/12 [Refereed][Not invited]
  • ニホンカラマツとグイマツ雑種F1苗木の光合成能に対するオゾン暴露と硫酸アンモニウム付加の影響
    菅井徹人, 渡部敏裕, 来田和人, 齋藤秀之, 渋谷正人, 小池孝良
    北方森林研究 64 63 - 66 2016/02 [Refereed][Not invited]
  • Saito Hideyuki
    The Japanese Forest Society Congress 日本森林学会 127 689 - 689 2016 
    [in Japanese]
  • Sugai Tetsuto, Watanabe Toshihiro, Kita Kazuhito, Saito Hideyuki, Shibuya Masato, Koike Takayoshi
    The Japanese Forest Society Congress 日本森林学会 127 730 - 730 2016 
    [in Japanese]
  • Wada Hisayuki, Saito Hideyuki, Shibuya Masato, Koike Takayoshi
    The Japanese Forest Society Congress 日本森林学会 127 334 - 334 2016 
    [in Japanese]
  • Fujita Saki, Kita Kazuhito, Saito Hideyuki, Shiubuya Masato, Koike Takayoshi
    The Japanese Forest Society Congress 日本森林学会 127 (0) 742 - 742 2016 [Refereed][Not invited]
     
    [in Japanese]
  • Hideyuki Saito, Akio Koizumi, Sampang Gaman, Prawira Yuda, Penyang, Masato Shibuya
    Tropical Peatland Ecosystems 513 - 549 2015/01/01 [Refereed][Not invited]
     
    Forestry is an important land-use type in tropical peatlands that provides socio-economic and environmental services. Currently, tropical peatland forestry has contributed to the timber industry, but timber harvest has unfortunately caused degradation and deforestation in massive areas of tropical peat swamp forests. Consequently, serious reductions of wood resources and environmental services occurred in peatland forests, with land managers being caught in a forest management dilemma between the needs for timber production, conservation and restoration of environmental services. The woody materials produced from peatland forests have various and unique characteristics these forests also provide commercially valuable timber. Given that degraded peatland can be restored to forest composed of indigenous trees of high ecological and commercial value, land managers feel confident that they can provide the benefits of both timber production and improved environmental services. First, during planting one must understand which tree species are best adapted to local site-conditions if successful reforestation techniques are to be developed. Cost-effectiveness must also be concerned, especially in degraded peatland, where considerable flooding may determine the survival and growth rates of seedlings and the operating cost. Second, as a management strategy, a reforestation program should be required to provide multiple benefits, not only timber production and environmental services, but these programs should also improve socio-economic conditions that ensure the ongoing livelihood of local people. In the future, tropical peatland forestry should play the roles of providing for both the restoration and sustainable use of wood resources in a way that benefits both the local community and the global market.
  • Watanabe Hanami, Fujita Saki, Meng Fakeng, Tamai Yutaka, Saito Hideyuki, shibuya Masato, Koike Takayoshi
    The Japanese Forest Society Congress 日本森林学会 126 (0) 255 - 255 2015 [Refereed][Not invited]
     
    [in Japanese]
  • Mineaki Aizawa, Hiroshi Yoshimaru, Makoto Takahashi, Takayuki Kawahara, Hisashi Sugita, Hideyuki Saito, Renat N Sabirov
    Journal of plant research 128 (1) 91 - 102 2015/01 [Refereed][Not invited]
     
    The genetic structure of Sakhalin spruce (Picea glehnii) was studied across the natural range of the species, including two small isolated populations in south Sakhalin and Hayachine, by using six microsatellite loci and maternally inherited mitochondrial gene sequences. We also analyzed P. jezoensis, a sympatric spruce in the range. Genetic diversity of P. glehnii was higher in central Hokkaido and the lowest in the Hayachine. Bayesian clustering and principal coordinate analysis by using the microsatellites indicated that the Hayachine was clearly distinct from other populations, implying that it had undergone strong genetic drift since the last glacial period. P. glehnii harbored four mitochondrial haplotypes, two of which were shared with P. jezoensis. One of the two was observed without geographical concentration, suggesting its derivation from ancestral polymorphism. Another was observed in south Sakhalin and in P. jezoensis across Sakhalin. The Bayesian clustering--by using four microsatellite loci, including P. jezoensis populations--indicated unambiguous species delimitation, but with possible admixture of P. jezoensis genes into P. glehnii in south Sakhalin, where P. glehnii is abundantly overwhelmed by P. jezoensis; this might explain the occurrence of introgression of the haplotype of P. jezoensis into P. glehnii.
  • 窒素沈着がダケカンバとシラカンバの成長と外生菌根の発達に与える影響
    荒木基二, 渡辺誠, 斎藤秀之, 渋谷正人, 玉井裕, 小池孝良
    北方森林研究 62 65 - 66 2014/02 [Refereed][Not invited]
  • 摩周湖外輪山ダケカンバ衰退木の葉の水分特性と土壌特性
    佐久間彬, 渡辺誠, 若松歩, 小林史和, 川井田東吾, 斎藤秀之, 小池孝良
    北方森林研究 62 61 - 64 2014/02 [Refereed][Not invited]
  • Yasutomo Hoshika, Shinpei Tatsuda, Makoto Watanabe, Xiao-na Wang, Yoko Watanabe, Hideyuki Saito, Takayoshi Koike
    ENVIRONMENTAL AND EXPERIMENTAL BOTANY 90 12 - 16 0098-8472 2013/06 [Refereed][Not invited]
     
    We examined the effects of ambient ozone, at the somma of Lake Mashu in northern Japan, on the growth and photosynthetic traits of two common birch species in Japan (mountain birch and white birch). Seedlings of the two birch species were grown in open-top chambers and were exposed to charcoal-filtered ambient air (CF) or non-filtered ambient air (NF) at the somma of Lake Mashu during the growing season in 2009. For the mountain birch, ambient ozone significantly increased the ratio of aboveground dry mass to belowground dry mass (TIR ratio), although no difference in the whole-plant biomass was observed between the treatments. For the white birch, in contrast, ozone exposure at ambient level did not decrease in growth and photosynthesis. These results suggest that ambient O-3 at the somma of Lake Mashu may shift the allocation of biomass to above-ground rather than below-ground in the mountain birch. (C) 2012 Elsevier B.V. All rights reserved.
  • Saito Hideyuki, Kamimura Akiko, Sese Jun, Shimizu (Inatsugi) Rie, Shimizu Kentaro
    The Japanese Forest Society Congress 日本森林学会 124 840 - 840 2013 
    発現遺伝子を指標に用いた樹木のストレス診断技術の開発の一環として、高温がブナ苗木の葉の遺伝子発現パターンに与える影響を調べ、高温ストレス前歴を指標できる遺伝子の探索を行った。供試木には5年生のブナ苗木を用いた。温度制御は人工気象室を用いて個体全体に処理した。高温処理前後の生育温度は20℃／15℃（昼夜）で、高温処理は昼時に5℃ずつ段階的（1時間）に35℃まで上昇させる処理区と、40℃まで上昇させる処理区を設けた。最高温で1時間処理した後に20℃へ戻した。供試葉は高温処理前、各高温処理2時間後、高温処理終了の1日後および1週間後に採取して全RNAを抽出した。遺伝子発現解析にはDNAマイクロアレイ法とリアルタイムPCR法を用いた。熱ショックタンパク質をコードする遺伝子群に注目したところ、高温のレベルにより発現応答の異なる遺伝子があった。高温処理後、速やかに発現量を低下させる遺伝子と持続的に高い発現レベルを維持する遺伝子があった。以上から、熱ショックタンパク質をコードする遺伝子群には高温レベルや持続性で異なる発現特性が示され、遺伝子診断における高温前歴指標として利用できる可能性が示された。
  • 原悠子, 伊藤寛剛, MAO Qiao‐zhi, 渡辺誠, 星加康智, 高木健太郎, 斎藤秀之, 渋谷正人, 小池孝良
    北方森林研究 (60) 39-40  2186-7526 2012/02/18 [Not refereed][Not invited]
  • 及川聞多, 松木佐和子, 斎藤秀之, 澁谷正人, 小池孝良
    北方森林研究 (60) 111-112  2186-7526 2012/02/18 [Not refereed][Not invited]
  • 佐久間彬, 山口高志, 野口泉, 渡辺忠, 若松歩, 渡辺誠, 斉藤秀之, 渋谷正人, 小池孝良
    北方森林研究 (60) 43-44  2186-7526 2012/02/18 [Not refereed][Not invited]
  • 斎藤秀之
    北方林業 64 (2) 38-41  0388-8045 2012/02 [Not refereed][Not invited]
  • 渡辺誠, 渡辺誠, 龍田慎平, 渡邊陽子, 斉藤秀之, 小池孝良
    北方林業 63 (2) 33-35  0388-8045 2011/02 [Not refereed][Not invited]
  • チェンバーを利用したダケカンバの成長解析
    龍田慎平, 渡辺 誠, 斎藤秀之, 小池孝良
    北方林業 63 (2) 11 - 13 2011 [Refereed][Not invited]
  • 開放系大気CO2増加（FACE）施設で育成したカンバ類3種のシュートの動態
    伊藤寛剛, 渡辺 誠, 毛 巧芝, Eka Novriyanti, 上田 龍四郎, 高木 健太郎, 笹 賀一郎, 斎藤秀之, 渋谷正人, 小池孝良
    日本森林学会北海道支部論文集 59 31 - 38 2011 [Refereed][Not invited]
  • 高CO2および高O3下におけるカンバ類３種稚樹の成長.
    稲田直輝, 渡辺 誠, 斉藤秀之, 澁谷正人, 小池孝良
    日本森林学会北海道支部論文集 59 41 - 44 2011 [Refereed][Not invited]
  • M. L. Lopez C, T. Shirota, G. Iwahana, T. Koide, T. C. Maximov, M. Fukuda, H. Saito
    JOURNAL OF FOREST RESEARCH 15 (6) 365 - 373 1341-6979 2010/12 [Refereed][Not invited]
     
    Sap flow measurements, from July to August 2004, were coupled with micrometeorological, soil moisture, and soil temperature measurements to analyze forest water dynamics in irrigated and undisturbed (control) larch (Larix cajanderi) forest plots in eastern Siberia. Plots were irrigated with 120 mm (20 mm day(-1)) of water from 17 to 22 July. Sap flow measurements of ten trees at each plot were scaled up to daily stand canopy transpiration (E(c)). Canopy transpiration at the irrigation and control plots was similar before irrigation. Forest evapotranspiration (E(a)) was obtained from Ohta et al. (Agric For Meteorol 148:1941-1953, 2008) while E(a) in the irrigation plot was estimated based on the E(c_irrig/Ec_cont) ratio. Rainfall during July-August was 63.4 mm but, after including water from thawing soil layers, the actual water input was 109.9 and 218.5 mm in the control and irrigation plots, respectively. Despite this large difference, a corresponding difference in E(c) (and E(a)) was not observed [42.6 (61.5) mm and 46.4 (71.8) mm in control and irrigation plots, respectively]. Daily canopy conductance (g(c)) increased as long as moisture was well supplied in the upper soil layers and evaporative demand was high. Soil moisture and rainfall contribution to E(a) was 36.9 and 24.6 mm in the control plot and 34.5 and 37.3 mm in the irrigation plot, respectively. Water supply from soil thawing layers in the control plot and high runoff (105.6 mm) rates in the irrigation plot accounted for the similarity in water dynamics. Under increased precipitation, the forest used less soil water stored from previous growing seasons.
  • Takahiro Koide, Hideyuki Saito, Tetsuoh Shirota, Go Iwahana, M. Larry Lopez C, Trofim C. Maximov, Shuichi Hasegawa, Ryusuke Hatano
    SOIL SCIENCE AND PLANT NUTRITION 56 (4) 645 - 662 0038-0768 2010/08 [Refereed][Not invited]
     
    A future increase in heavy precipitation events is predicted in boreal regions. An irrigation experiment was conducted in Taiga forest in eastern Siberia to evaluate the effect of heavy precipitation on greenhouse gas ([GHG] CO(2), CH(4), and N(2)O) fluxes in the soil. The GHG fluxes on the soil surface were measured using a closed-chamber method and GHG production rates in the mineral soil were estimated using the concentration-gradient method based on Fick's law. Irrigation water (20 mm day-1) was applied continuously for 6 days (120 mm in total; the same amount as summer precipitation in this region). Greenhouse gas production rates in the organic layer (O-layer) were defined as the difference between the GHG fluxes and the GHG production rates in the mineral soil. Carbon dioxide flux was measured both in root-intact (R(s)) and trenched plots (R(mw)). The root respiration rate (R(r)) was calculated as the difference between R(s) and R(mw). Considering the root distribution in the soil, we regarded the CO(2) production rate in the mineral soil to be the microbial respiration rate in the mineral soil (R(mm)) and microbial respiration rate in the O-layer (R(mo)) as the difference between R(mw) and R(mm). Irrigation increased both soil temperature and moisture in the irrigated plot. The R(s), CH(4) flux and N(2)O flux during the irrigation period were higher in the irrigated plot than that in the non-irrigated plot (P < 0.05; mean R(s) +/- standard deviation [SD] (mg C m-2 h-1) were 171 +/- 20 and 109 +/- 11, mean CH(4) flux +/- SD (mu g C m-2 h-1) were -5.4 +/- 4.1 and -14.0 +/- 6.5, and mean N(2)O flux +/- SD (mu g N m-2 h-1) were 1.6 +/- 1.6 and 0.2 +/- 1.1, respectively). Soil moisture had a positive effect on R(mm) and CH(4) production rate in the O-layer, a negative effect on R(r), and did not affect R(mo), the CH(4) production rate in the mineral soil or the N(2)O production rates in both the O-layer and the mineral soil. Soil temperature had a positive effect on R(r) and R(mo). The increment of global warming potential of the soil mainly resulted from an increase in microbial respiration rates. Future changes in precipitation patterns in this region would accelerate decomposition of the soil organic matter.
  • 北海道産ダケカンバとシラカンバの成長特性
    小池孝良, 龍田慎平, 渡辺 誠, 斎藤 秀之
    日本森林学会北海道支部論文集 58 23 - 24 2010 [Refereed][Not invited]
  • H. Iwasaki, H. Saito, K. Kuwao, T. C. Maximov, S. Hasegawa
    HYDROLOGY AND EARTH SYSTEM SCIENCES 14 (2) 301 - 307 1027-5606 2010 [Refereed][Not invited]
     
    In the permafrost region near Yakutsk, eastern Siberia, Russia, annual precipitation (June-May) in 2005-2006 and 2006-2007 exceeded the 26-year (1982-2008) mean of 222 +/- 68 mm by 185 mm and 128 mm, respectively, whereas in 2007-2008 the excedent was only 48 mm, well within the range of variability. Yellowing and browning of larch (Larix cajanderi Mayr.) trees occurred in an undisturbed forest near Yakutsk in the 2007 summer growing season. Soil water content at a depth of 0.20 m was measured along a roughly 400 m long line transect running through areas of yellowing and browning larch trees (YBL) and of normal larch trees (NL). In the two years of supranormal precipitation, soil water content was very high compared to values recorded for the same area in previous studies. For both wet years, the mean degree of saturation (s) was significantly greater in YBL than NL areas, whereas the converse was the case for the gas diffusivity in soil. This implies that rather than mitigating water stress suffered during normal precipitation years, elevated soil water conditions adversely affected the growth of larch trees. Eastern Siberia's taiga forest extends widely into the permafrost region. Was such supranormal annual precipitation to extend for more than two years, as might be expected under impending global climate changes, forest recovery may not be expected and emission of greenhouse gas might continue in future.
  • Mineaki Aizawa, Hiroshi Yoshimaru, Hideyuki Saito, Toshio Katsuki, Takayuki Kawahara, Keiko Kitamura, Fuchen Shi, Renat Sabirov, Mikio Kaji
    JOURNAL OF BIOGEOGRAPHY 36 (5) 996 - 1007 0305-0270 2009/05 [Refereed][Not invited]
     
    We used microsatellite markers to determine the range-wide genetic structure of Picea jezoensis and to test the hypothesis that the past population history of this widespread cold-temperate spruce has resulted in a low level of genetic variation and in imprints of inbreeding and bottlenecks in isolated marginal populations.The natural range of the three infraspecific taxa of P. jezoensis throughout north-east Asia, including isolated marginal populations.We analysed a total of 990 individuals across 33 natural populations using four nuclear microsatellite loci. Population genetic structure was assessed by analysing genetic diversity indices for each population, examining clustering (model-based and distance-based) among populations, evaluating signals of recent bottlenecks, and testing for isolation by distance (IBD).The 33 populations were clustered into five groups. The isolated marginal groups of populations (in Kamchatka, Kii in Japan and South Korea) exhibited low levels of allelic richness and gene diversity and a complete or almost complete loss of rare alleles. A recent bottleneck was detected in the populations in Hokkaido across to mid-Sakhalin. The IBD analysis revealed that genetic divergence between populations was higher for populations separated by straits.Picea jezoensis showed a higher level of genetic differentiation among populations (F(ST) = 0.101) than that observed in the genus Picea in general. This might be attributable to the fact that historically the straits around Japan acted as barriers to the movement of seeds and pollen. The low levels of genetic diversity in the isolated marginal population groups may reflect genetic drift that has occurred after isolation. Evidence of a significant bottleneck between the Hokkaido and mid-Sakhalin populations implies that the cold, dry climate in the late Pleistocene resulted in the decline and contraction of populations, and that there was a subsequent expansion followed by a founder effect when conditions improved. The high polymorphism observed in P. jezoensis nuclear microsatellites revealed cryptic genetic structure that organellar DNA markers failed to identify in a previous study.
  • Hayato Iijima, Masato Shibuya, Hideyuki Saito
    ECOSCIENCE 16 (3) 352 - 360 1195-6860 2009 [Refereed][Not invited]
     
    The coexistence mechanism of Abies sachalinensis and Picea jezoensis, which usually regenerate on fallen logs, was examined with respect to differences in suitable conditions for germination and shade tolerance in Hokkaido, northern Japan. Germination conditions were evaluated through the effect of log hardness, moss height, light condition, and shading by taller seedlings on fallen logs, and shade tolerance was evaluated by physiological and morphological traits and survival dynamics in a natural coniferous forest. In contrast to P. jezoensis, the number of germinated seedlings of A. sachalinensis increased with moss height. The number of germinated seedlings decreased with shading only in P. jezoensis. Consequently, it is suggested that germination of P. jezoensis is limited to fresh, recently fallen logs. The survival rate of A. sachalinensis under low-light conditions (< 5% of relative photosynthetic photon flux density) was higher than that of P. jezoensis. Abies sachalinensis had a higher leaf mass ratio (total leaf mass/total mass) and leaf area ratio (total leaf area/total mass) than P. jezoensis. In conclusion, earlier establishment of P. jezoensis on fallen logs and higher shade tolerance of A. sachalinensis are suggested to contribute to the coexistence of these 2 species.
  • Motoshi Tomita, Hideyuki Saito, Yoshihisa Suyama
    FOREST ECOLOGY AND MANAGEMENT 256 (6) 1350 - 1355 0378-1127 2008/09 [Refereed][Not invited]
     
    The effect of local pollen donor density (conspecific) and local total tree density (all species) on pollen pool diversity, outcrossing rate, and filled seed ratio were examined in a natural stand of the sub-boreal conifer Picea jezoensis Carr. Seed cones were collected from 17 mother trees, and the percentage of filled seed were calculated for five cones per tree. In addition, local stand density of pollen donors and total trees were investigated within r < 30m from the focal mother trees. Using four polymorphic microsatellite markers, the average pairwise kinship coefficient F-s and multilocus outcrossing rate t(m) were estimated on germinated seedlings sampled from 14 mother trees. F-s showed significant positive correlation to local total tree density (r = 0.541, p = 0.046). Since F-s is inversely proportional to the effective number of pollen donors N-ep, genetic diversity of pollen pool was decreased in mother trees with higher local total tree density. Applying a generalized linear mixed model to filled seed ratio and local stand density of pollen donors and total trees, a negative impact of local pollen donors on filled seed ratio was found. We conclude that both local stand density as well as global stand density are important in the management of a natural stand of P. jezoensis. (C) 2008 Elsevier B.V. All rights reserved.
  • Hayato Iijima, Masato Shibuya, Hideyuki Saito
    JOURNAL OF FOREST RESEARCH 12 (4) 262 - 269 1341-6979 2007/08 [Refereed][Not invited]
     
    We surveyed the germination number (Ncs) of 2-year and a 1-year survival of Abies sachalinensis and Picea jezoensis seedlings and saplings on 29 fallen logs from 2004 to 2005 in a natural coniferous forest in Hokkaido, northern Japan, in relation to the surface and light conditions of fallen logs. Moss height ( H-moss), log hardness (Hardness), and the area of fallen log (Area) were measured as the surface conditions by each 1-m block from bottom to top of all fallen logs. The relative photosynthetic photon flux density (rPPFD) 10 cm above the tallest seedling in each block was measured as the light condition. In addition, the height of the tallest seedling or sapling in each block (H-max), the difference between a height of each seedling and sapling and the Hmax (Shading), and a height of seedlings and saplings in 2004 (H-ini) were considered. Ncs of A. sachalinensis was affected by Hardness and Area, whereas Ncs of P. jezoensis was affected by Hmoss, Hardness, Area, Hmax, and rPPFD. The survival of seedlings (height < 5 cm) and saplings (5 cm <= height < 50 cm) were affected by Hini, rPPFD, and shading for both species. However, the survival of P. jezoensis saplings was more sensitive to decrease in rPPFD and increase of shading than that of A. sachalinensis. Therefore, seedling emergence was influenced by surface conditions, whereas survival was affected by light conditions. Furthermore, P. jezoensis emergence and survival were more sensitive to surface and light conditions than that of A. sachalinensis.
  • M. Aizawa, H. Yoshimaruth, H. Saito, T. Katsuki, T. Kawahara, K. Kitamura, F. Shi, M. Kaji
    MOLECULAR ECOLOGY 16 (16) 3393 - 3405 0962-1083 2007/08 [Refereed][Not invited]
     
    Range-wide genetic variation of the widespread cold-temperate spruce Picea jezoensis was studied throughout northeast Asia using maternally inherited mitochondrial DNA and paternally inherited chloroplast DNA markers. This study assessed 13 natural populations including three varieties of the species in Japan, Russia, China, and South Korea. We depicted sharp suture zones in straits around Japan in the geographical distribution pattern of mitochondrial haplotypes (G(ST) = 0-901; N(ST) = 0.934). In contrast, we detected possible extensive pollen flow without seed flow across the straits around Japan during the past population history in the distribution pattern of chloroplast haplotypes (G(ST) = 0.233; N(ST) = 0.333). The analysis of isolation by distance of the species implied that by acting as a barrier for the movement of seeds and pollen, the sharp suture zones contributed considerably to the level of genetic differentiation between populations. Constructed networks of mitochondrial haplotypes allowed inference of the phylogeographical history of the species. We deduced that the disjunction with Kamchatka populations reflects range expansion and contraction to the north of the current distribution. Within Japan, we detected phylogeographically different types of P. jezoensis between Hokkaido and Honshu islands; P. jezoensis in Honshu Island may have colonized this region from the Asian continent via the Korean peninsula and the species in Hokkaido Island is likely to have spread from the Asian continent via Sakhalin through land bridges. Japanese endemism of mitochondrial haplotypes in Hokkaido and Honshu islands might have been promoted by separation of these islands from each other and from the Asian continent by the straits during the late Quaternary.
  • M. L. C. Lopez, H. Saito, Y. Kobayashi, T. Shirota, G. Iwahana, T. C. Maximov, M. Fukuda
    JOURNAL OF HYDROLOGY 338 (3-4) 251 - 260 0022-1694 2007/05 [Not refereed][Not invited]
     
    Sapflow measurements were carried out in a larch forest in eastern Siberia, an area of wide permafrost distribution. Canopy transpiration and canopy conductance were scaled up from these values. The objective was to analyze the relationship between environmental variables, mainly vapour pressure deficit (D), soil moisture and soil, thawing rate with canopy transpiration and canopy conductance. Maximum sapflow rate was 42.4 kg d(-1) tree(-1) with bigger trees showing a more accentuated response to environmental changes. Canopy transpiration (E-c) showed inter-annual variability, with a maximum value of 1.7 mm d(-1) in 2003 and 1.2 mm d(-1) in 2004. Soil moisture was higher in 2003 because of higher precipitation (230 mm in 2003 compared to 110 mm in 2004 for the total growing season). Maximum soil thawing rate in 2003 and 2004 was 140 cm and 120 cm, respectively, because of different air temperature, soil water content and precipitation regime among other factors. Canopy conductance (g(c)) was positively correlated with D during fine weather and well-watered days in both years. On the other hand, canopy conductance was well correlated with soil moisture (R-2 = 0.83) in the upper layers (20-30 cm depth) during 2003 (wet year) but not in 2004 (dry year), representing its strong but limited control over water fluxes from the forest. By comparison with other studies in this region, canopy transpiration is estimated to contribute to almost 50% of the total forest evaporation, highlighting the important role of understorey transpiration in permafrost regions. Our results show that it is not only the impermeability of permafrost with the property of keeping soil moisture in the thin active layer but it is also the slow soil thawing rate that plays the important role of controlling the amount of water available for trees roots in the upper soil layers during dry years. (C) 2007 Elsevier B.V. All rights reserved.
  • Inada H, Fujikawa S, Saito H, Arakawa K
    Environmental sciences : an international journal of environmental physiology and toxicology 14 Suppl 53 - 71 0915-955X 2007 [Refereed][Not invited]
  • Yamada Tadayasu, Hayashi Toshiro, Saito Hideyuki, Shibuya Masato
    The Japanese Forest Society Congress 日本森林学会 118 109 - 109 2007
  • Iwahana Go, Saito Hideyuki, Shirota Tetsuou, Lopez Larry, Fukuda Masami
    Proceeding of Annual Conference 水文・水資源学会 20 50 - 50 2007 
    永久凍土帯における森林生態系の土壌水分変化に対する応答特性を把握するために，東シベリア・ヤクーツク近郊に位置する観測サイト（スパスカヤパッド）のカラマツ林において潅水実験を実施している．各10m四方の潅水区（Iサイト）及び対照区（Cサイト）を設定し，2003年の融解期に予備調査を行った後，2004，2005，2006年の融解期にIサイトにおいてそれぞれ合計120，130，100mmの潅水を7月・8月の間に6から13回に分けて行った．本発表では，2003年6月から2006年9月にかけて実施したこの比較実験中の地温及び土壌水分量，地中熱流量の観測結果を述べる．
  • H Iijima, M Shibuya, H Saito, K Takahashi
    CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE 36 (3) 664 - 670 0045-5067 2006/03 [Refereed][Not invited]
     
    We examined whether fallen logs without moss (FLB) are more drought-stressful sites for Picea jezoensis Carr. seedlings than are logs with moss (FLM) and whether drought affects the mortality of seedlings on logs. We measured the water potential of the log humus layer (Psi(H)) and needles of seedlings on the logs (Psi(N)) in a natural forest and a greenhouse under various drought conditions. We also determined the critical Psi(N) from the relationship between seedling mortality, Psi(N), and chlorophyll fluorescence, Fv/Fm. The Psi(H) on both moss-covered and bare logs in the forest was 0 MPa, regardless of the number of days without precipitation. In the forest, the mean predawn Psi(N) of FLB and FLM measured 11 days after a rainfall was -0.8 and -0.7 MPa, respectively, in the driest season. The Psi(N) for P. jezoensis seedlings of FLB reached the critical value earlier than those of FLM in the greenhouse, but this occurred after a long period (> 30 days) with no irrigation. We conclude that drought does not cause mortality of P. jezoensis seedlings on fallen logs in natural forests.
  • 花田 尚子, 渋谷 正人, 斎藤 秀之, 高橋 邦秀
    日本森林学会誌 88 (1) 1 - 7 1349-8509 2006 [Refereed][Not invited]
  • Initial screening of fast-growing tree species that can tolerate dry tropical peatlands in Central Kalimantan, Indonesia.
    Saito H, Shibuya M, Tuah SJ, Turjaman M, Takahashi K, Jamal Y, Segah H, Putir PE, Limin SH
    Journal of Forestry Research 2 107 - 115 2005 [Refereed][Not invited]
  • K Ozaki, H Saito, K Yamamuro
    ECOLOGICAL RESEARCH 19 (2) 225 - 231 0912-3814 2004/03 [Refereed][Not invited]
     
    The effects of partial debudding on photosynthesis, stomatal conductance and nitrogen contents of 1-year-old needles and newly grown needles were studied in Picea jezoensis (Sieb. et Zucc.). Seventy-five percent of the buds of P. jezoensis seedlings were removed soon after bud break. Gas exchange was measured three times for 1-year-old needles and twice for current-year needles. The photosynthetic rates of 1-year-old needles were greater in debudded seedlings than in control seedlings, and the difference increased as the growing season progressed. This greater photosynthetic rate in debudded seedlings was accompanied by greater stomatal conductance. However, neither the photosynthetic rates nor the stomatal conductance of current-year needles differed between debudded and control seedlings after the needles had fully expanded. Debudding also had no effect on mass-based nitrogen contents in either the 1-year-old or the current-year needles. Area-based nitrogen in the 1-year-old needles did not differ between debudded and control seedlings, but was greater in debudded seedlings than in control seedlings in current-year needles. These results suggest that the enhanced photosynthetic rate is more likely a result of an increased root/leaf ratio that reduces the stomatal limitation of photosynthetic rate than a result of altered sink-source relationships or increased leaf nitrogen content.
  • SAITO HIDEYUKI, SUTO HIROSHI, KAKUBARI YOSHITAKA
    日本緑化工学会誌 日本緑化工学会 26 (3) 178-187 - 187 0916-7439 2001/02 [Refereed][Not invited]
     
    The influence of air water vapor pressure deficit (VPD) on CO_2 assimilation rate (A) within a standing beech (Fagus crenata) tree crown on Mt. Fuji in Japan was examined by integrating the actual VPD during a growing season and the measurements of A and transpiration rate (E) under different VPD conditions in gas-exchange chamber by detached method. From 21 April to 31 October 1997,the maximum of VPD in sun and shade crown (20m and 12m height above the forest floor) was 32.8 Pa kPa^<-1> and 24.2 Pa kPa^<-1>, respectively. The number of days in which the daily maximum of VPD exceeded 10 Pa kPa^<-1> was 101 and 80 in sun and shade crown, respectively. The frequency of the measurements at half hour intervals in day time in which VPD was over 10 Pa kPa^<-1> was approximately 10% in both sun and shade crown. When the VPD in gas-exchange chamber changed from 3 to 15 Pa kPa^<-1>, the difference between VPD and leaf-to-air water vapor pressure deficit (ΔW) was less than 1Pa kPa^<-1> for sun and shade leaves. The A decreased to below 90% level of maximum with increasing of ΔW over 9Pa kPa^<-1> for sun and shade leaves. The stomatal conductance, intercellular CO_2 concentration, and mesophyll conductance also decreased with increasing of ΔW over 6Pa kPa^<-1>. The E increased with increasing of ΔW, thus the water use efficiency of CO_2 assimilation (A/E) decreased. We conclude that (1) VPD is an important factor that decreses the A and A/E and increases E within a beech tree crown, (2) the decreasing of A is accompanied by the decreases of stomatal conductance, intercellular CO_2 concentration, and mesophyll conductance.
  • Chronosequential analysis of aboveground biomass and the carbon and nitrogen contents in natural Larix stands in eastern Siberia
    Shibuya M, Tsuno Y, Saito H, Takahashi K, Sawamoto T, Hatano R, Isaev AP, Maximov TC
    Bulletin of Research Center for North Eurasia and North Pacific Regions, Hokkaido, University 1 57 - 66 2001 [Not refereed][Not invited]
  • Aboveground biomass, nitrogen and carbon contents in Larix stands in eastern Siberia
    Tsuno Y, Shibuya M, Saito H, Takahashi K, Sawamoto T, Hatano R, Isaev AP, Maximov TC
    Proceedings of the ninthe symposium on the joint Siberian permafrost studies between Japan and Russia in 2000 68 - 74 2001 [Not refereed][Not invited]
  • Characteristics of Nitrogen cycling in permafrost regional ecosystems in Yakutsk, Russia
    Hatano R, Sawamoto T, Shibuya M, Saito H, Tuno Y, Takahashi K, Kobayashi Y, Iwahana G, Desyatkin RV, Isaev AP
    Proceedings of the ninthe symposium on the joint Siberian permafrost studies between Japan and Russia in 2000 99 - 103 2001 [Not refereed][Not invited]
  • Effect of forest fire on NEP in Taiga soil ecosystems, near Yakutsk, Russia
    Sawamoto T, Hatano R, Shibuya M, Saito H, Tuno Y, Takahashi K, Isaev AP, Desyatkin RV, Maximov TC
    Proceedings of the ninthe symposium on the joint Siberian permafrost studies between Japan and Russia in 2000 120 - 127 2001 [Not refereed][Not invited]
  • ブナ樹冠の光合成特性と光合成に関連する遺伝子群の発現に関する研究.
    斎藤 秀之
    静岡大学演習林報告 24 1 - 54 2000 [Refereed][Not invited]
  • SAITO H, KAKUBARI Y
    Journal of Forest Research Japanese Forestry Society 4 (1) 27 - 34 1341-6979 1999 [Refereed][Not invited]
     
    The light response curve and the intercellular CO_2 concentration response curve of CO_2 assimilation rate were investigated together with the light conditions at the four different heights within the beech crown from 1995 to 1997 on Mt. Fuji in Japan. On the seasonal fiuctuation, the CO_2 assimilation rate at light saturated condition increased rapidly in May, and attained to the maximum between the end of June and July, thereafter, slightly decreased until the middle of August and rapidly decreased in September and October. The daily sum of photosynthetic photon flux density attenuated with deeping within the crown, and particularly, the relative value on 2nd position dropped to only 30%. The A_ decreased from 10 to 5 μmol m^<-2> s-1>, approximately, with deeping within the crown. The light saturation point, quantum yield, light compensation point and dark respiration rate also varied with deeping. These results suggest that the photosynthetic properties vary gradually from sun to shade leaves along the light attenuation within a beech crown. At light saturated condition, the stomatal conductance and mesophyll conductance were strongly correlat-ed with A_ among the four different heights (r > 0.96, respectively). The C_i/C_a ratio was around 0.8, and there were no remarkable differences among the four different heights. These results suggest that the vertical gradient of A_ depends on the variation of mesophyll conductance. The stomatal conductance may be also one of the major factor in the vertical gradient of A_. However the intercellular CO_2 concentration doesn't influence the vertical gradient of A_ within the crown.
  • Molecular cloning of a cDNA (Accession No. AB006080) encoding the small subunit of ribulose-1,5-bisphosphate carboxylase/oxygenase from the Japanese beech (Fagus crenata Blume)
    Saito H, Futamura N, Mukai Y, Kakubari Y, Shinohara K
    Plant Physiology 115 863  1997 [Refereed][Not invited]
  • Isolation and characterization of a cDNA (Accession No. AB006081) encoding the light-harvesting chlorophyll a/b-binding protein of photosystem II from the Japanese beech (Fagus crenata Blume)
    Saito H, Futamura N, Mukai Y, Kakubari Y, Shinohara K
    Plant Physiology 115 1729  [Refereed][Not invited]

MISC

Books etc

  • Tropical peatland ecosystem
    SAITO Hideyuki (Joint workTropical Peatland Forestry: Toward Forest Restoration and Sustainable Use of Wood Resources in Degraded Peatland)
    Springer 2016
  • Symptom of environmental change in Siberian permafrost region
    Hokkaido University Press 2006
  • 森林の科学<（中村太士・小池孝良編）>
    朝倉書店 2005

Presentations

  • 遺伝子ネットワーク解析によるブナ衰退現象の因果推論  [Not invited]
    斎藤秀之, 小林壱德久, 和田尚之, 小倉淳, 瀬々潤
    第128回日本森林学会  2017/03
  • ブナ花成のエピジェネティック制御 ―DNAメチル化の決定時期と養分の影響―  [Not invited]
    和田尚之, 斎藤秀之, 小林壱德久, 星野洋一郎
    第128回日本森林学会  2017/03
  • 只見ブナ林の大気汚染環境とブナのストレス診断  [Not invited]
    斎藤 秀之
    平成28年度「自然首都・只見」学術調査研究助成事業研究成果発表会  2017/01
  • 細胞分裂から見たブナ花成の制御時期  [Not invited]
    和田尚之, 斎藤秀之, 小林壱徳久, 星野洋一郎
    北方森林学会  2016/11
  • RNA-seqに基づくブナ衰退木の葉の発現変動遺伝子解析  [Not invited]
    小林壱德久, 斎藤秀之, 齋藤央嗣, 谷脇徹, 相原敬次, 小倉淳, 瀬々潤, 渋谷正人, 小池孝良
    2016/11
  • 発現遺伝子のオミックス解析によるブナ成木の衰退度の評価法～トランスクリプトーム VS.プロテオーム～  [Not invited]
    斎藤秀之, 高須賀太一, 堀千明, 神村章子, 小林壱徳久, 和田尚之, 齋藤央嗣, 谷脇徹, 相原敬次, 小倉淳, 瀬々潤
    北方森林学会  2016/11
  • Nuclear genome size of Abies sachalinensis in Hokkaido Island, Japan  [Not invited]
    Saito H, Wada H, Kobayashi I, Hoshino Y, Shibuya M
    Abies 2016 Ecology and silviculture of fir.  2016/09
  • Epigenetic regulation of floral initiation induced by nitrogen in a mast-flowering tree Siebold’s beech (Fagus crenata).  [Not invited]
    Hisayuki Wada, Hideyuki Saito
    International Conference on Agricultural Biodiversity and Sustainability 2016  2016/08
  • Field Data Transmission System, SESAME-II, by Universal Mobile Telecommunication Network.  [Not invited]
    Yukihisa Shigenaga, YoheiHamada, Hideyuki Saito, Mitsuru Osaki, Hidenori Takahashi, Wisnu Kenkana, Rony Teguh, Adi Jaya, Bambang Setiadi
    The 15th International Peat Congress (IPC)  2016/08
  • ゲノムを基盤にした森林樹木の生理生態学  [Invited]
    斎藤 秀之
    第127回日本森林学会大会  2016/03
  • ブナ花成のエピジェネティック制御－開葉時の養分とDNAメチル化の関係－  [Not invited]
    和田尚之, 斎藤秀之, 渋谷正人, 小池孝良
    第127回日本森林学会大会  2016/03
  • ゲノム網羅的な発現遺伝子を用いたブナ林の環境影響評価－トランスクリプトーム解析とプロテオーム解析による衰退指標の探索－  [Invited]
    斎藤秀之, 神村章子, 小林壱徳久, 高須賀太一, 堀千明, 杉村逸郎, 和田尚之, 山田宰靖, 瀬々 潤, 小倉淳, 清水健太郎, 齋藤央嗣, 谷脇徹, 相原敬次
    山地森林域の生物・環境モニタリング第10回ワークショップ  2016/03
  • 酸性および酸化性ストレスがブナの葉の遺伝子発現パターンに与える影響  [Not invited]
    斎藤秀之, 神村章子, 瀬々 潤, 小倉淳
    第126回日本森林学会大会  2015/03

Association Memberships

  • 北方森林学会   ヨーロッパ地球科学連合 (European Geosciences Union)   日本森林学会   日本森林技術協会   日本林学会北海道支部   日本緑化工学会   北海道の林木育種編集委員   European Geosciences Union   

Works

  • 学会発表（ポスター）Larix cajanderi林冠におけるシュート数動態
    2008
  • 学会発表（ポスター）ブナ樹冠の葉で発現する遺伝子の完全長cDNAクローンの網羅的な収集とカタログ化
    2008
  • 学会発表（ポスター）熱帯泥炭湿地樹木4種の当年生時における土壌の湛水と乾燥ストレスに対する耐性評価
    2008
  • 学会発表（ポスター）ブナ樹冠の葉の量的RT-PCRを用いた遺伝子発現解析のためのリファレンス・ジーンの選抜
    2008
  • 国際学術会議発表（ポスター）Ground-fire is not a significant event reducing shoot photosynthesis and stomatal conductance in the canopy of mature larch stand in eastern Siberia: A field manipulation experiment.
    2007
  • 国際学術会議発表（ポスター）Changing precipitation regimes and photosynthetic performance of the East-Siberian taiga.
    2007
  • 学会発表（口頭）東シベリアのカラマツ成熟林における葉，枝，幹の現存量と表面積
    2007
  • 学会発表（口頭）ポプラ葉の細胞分裂に関連する遺伝子群の発現と植物ホルモンの関わり合い
    2007
  • 学会発表（口頭）倒木上のエゾマツおよびトドマツ実生の生残・成長に環境条件が与える影響
    2007
  • 学会発表（口頭）遺伝子の発現情報を利用した樹木のストレス診断技術の提案にむけて
    2007
  • 学会発表（口頭）ブナ樹冠の葉における遺伝子発現の季節変化とストレス応答－光合成・活性酸素消去・老化誘導に関連する遺伝子群に注目して
    2007
  • 学会発表（口頭）樹勢により落葉時期が異なるブナの葉の光合成と遺伝子発現－光合成と老化誘導に関連する遺伝子に着目して
    2007
  • 黒松内ブナセンター賞講演会（口頭）遺伝子の発現でブナの声は聞けないか？
    2007
  • 学会発表（ポスター）東シベリアのカラマツ老齢個体における短枝の長枝化現象
    2007
  • 学会発表（口頭）ミズナラのカンバ類へのアレロパシー作用の検討
    2006
  • 学会発表（口頭）行列を用いた北海道の落葉広葉樹林の動態解析
    2006
  • 国際シンポジューム発表（ポスター）Effect of soil moisture on growth of Shorea balangeran seedlings on peat soil.
    2006
  • 国際シンポジューム発表（ポスター）Eco-physiology of Shorea balangeran seedlings for rehabilitation on burnt peat soil land in Central Kalimantan. A mini-review of UNPAR nursery and Kalanpangan projects.
    2006
  • 学会発表（口頭）東シベリアカラマツ成熟林における土壌水分が林冠部の光合成能力と葉面積指数に与える影響
    2006
  • 学会発表（口頭）ポプラの開葉期における個葉の細胞分裂と細胞分裂に関連する遺伝子群の発現特性
    2006
  • 学会発表（ポスター）ヤマグワの性表現とサイズ・環境依存性
    2006
  • 学会発表（ポスター）推移行列を用いた50 年間の落葉広葉樹林の動態解析
    2006
  • 学会発表（口頭）東シベリアカラマツ成熟林のエイジ-空間構造の解析
    2006
  • 学会発表（ポスター）エゾマツ・トドマツ稚樹群の動態に環境条件が与える影響
    2006
  • 学会発表（ポスター）北海道の亜高山性針葉樹林におけるエゾマツの花粉動態および繁殖構造
    2006
  • 国際シンポジューム発表（口頭）Comparison of structure among five mature larch forests in eastern Siberia.
    2005
  • 国際シンポジューム発表（ポスター）Changing precipitation regimes and leaf area in a canopy of mature larch forest in eastern Siberia.
    2005
  • 国際シンポジューム発表（ポスター）Analysis of spatial-size-age structure and fire history of matured larch forest in eastern Siberia.
    2005
  • 国際シンポジューム発表（ポスター）Changing precipitation regimes and photosynthetic performance of the East-Siberian taiga.
    2005
  • 国際シンポジューム発表（ポスター）Ecosystem carbon loss by clear-cutting in a mature larch forest in eastern Siberia.
    2005
  • 国際シンポジューム発表（口頭）Variety in forest structure of matured larch forest in eastern Siberia.
    2005
  • 国際シンポジューム発表（ポスター）Shoot morphology and photosynthetic properties in response to irrigation in a mature larch stand in eastern Siberia.
    2005
  • 学会発表（口頭）ヤマグワの性表現とサイズ・環境依存性
    2005
  • 学会発表（口頭）85年生トドマツ・エゾマツ人工林における間伐履歴と広葉樹の動態
    2005
  • 学会発表（口頭）地表火が東シベリアカラマツ成熟林の光合成速度と葉の形態に与える影響の評価
    2005
  • 国際シンポジューム発表（ポスター）Shoot amount and branching properties in response to irrigation in mature larch forest in eastern Siberia
    2005
  • 学会発表（口頭）様々な光環境で生育するエゾマツとトドマツの個葉の光合成特性
    2005
  • 国際シンポジューム発表（ポスター）Safe site of larch seedlings in the lightly burnt forest in eastern Siberia.
    2005
  • 学会発表（ポスター）北海道の主要な広葉樹の花粉制限と自家不和合性その1 -開花フェノロジーと結果結実
    2005
  • 学会発表（ポスター）イタヤカエデの開花と結実
    2005
  • 学会発表（ポスター）倒木上におけるエゾマツとトドマツの個体群構造と周囲環境の関係
    2005
  • 学会発表（ポスター）東シベリアのカラマツ成熟林における樹冠の光合成速度を制限する環境要因の評価 -日中低下における葉温・葉面飽差・土壌水分の影響-
    2005
  • 学会発表（ポスター）東シベリアのカラマツ成熟林における樹冠の光合成速度を制限する環境要因の評価 -降水の影響について
    2005
  • 学会発表（ポスター）地表火が東シベリアカラマツ成熟林樹冠の光合成速度に与える影響の評価 -火入れ処理直後の変化
    2005
  • 学会発表（ポスター）立地条件がサイシウモミの更新に与える影響
    2005
  • 学会発表（ポスター）風害後50年間の落葉広葉樹林の林分回復過程
    2005
  • 学会発表（ポスター）ブナの葉のサイズ決定機構に関する研究 -細胞分裂か？細胞肥大か？産地の異なるブナの葉の解剖学的解析から
    2005
  • 学会発表（ポスター）北海道の主要な広葉樹の花粉制限と自家不和合性その2 -花粉制限と自家不和合性
    2005
  • 国際シンポジューム発表（ポスター）The effect of moss height on regeneration of Picea jezoensis on fallen logs
    2004
  • 学会発表（口頭）イタヤカエデの開花と結実
    2004
  • 学会発表（口頭）カラマツ人工林内における広葉樹の更新過程
    2004
  • 学会発表（口頭）異なる水ポテンシャル条件下のサイシウモミとトドマツ種子の発芽特性
    2004
  • 国際シンポジューム発表（ポスター）Response of transpiration from Larix gmelinii stands to Irrigation in Eastern Siberia.
    2004
  • 国際シンポジューム発表（ポスター）Estimation of the productive structure of Larix cajanderi forest in Spasskaya Pad.
    2004
  • 国際シンポジューム発表（ポスター）Immediate changes in NEP following clear-cutting in a mature larch stand in eastern Siberia.
    2004
  • 学会発表（ポスター）老齢ダフリアカラマツの樹形づくり
    2004
  • 学会発表（ポスター）低温湿層処理期間の違いによるサイシウモミとトドマツ種子の発芽反応
    2004
  • 学会発表（ポスター）異なるコケの高さの倒木における土壌水分およびエゾマツ実生の葉の水ポテンシャルの関係
    2004
  • 学会発表（ポスター）海抜高度の異なるブナ林の葉の形態に関する解剖学的研究.
    2004

Research Projects

  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2019/06 -2022/03 
    Author : Saito Hideyuki
     
    We showed a delayed reduction of photosynthetic capacity in summer season caused by O3 exposure during bud break period, associated with increased DNA methylation of 16S rRNA gene in chloroplast genome in beech saplings, suggesting epigenomic regulation in photosynthesis. Also in bud break period, we showed lacks of sugars and/or phosphorus in the developing leaves affected DNA methylation level of FT homologous gene in leaves, suggesting the nutrients supplied from carry-over products determined the availability of flower bud differentiation in summer.
  • ゲノム動態解析に基づくブナ林の衰退兆候の評価法
    日本学術振興会：科学研究費助成事業 基盤研究（B)
    Date (from‐to) : 2017/04 -2021/03 
    Author : 斎藤 秀之
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2016/04 -2019/03 
    Author : Ishihara Makoto, Ichihara Yu, Okuda Misaki, Nishi Syuntaro, Nakamura Tomomi
     
    With regard to induction condition of resistance, it has been found that strong resistance is exhibited by the additional irradiation of ultraviolet light. With regard to the physiological mechanism, under strong light condition, the area of hyperplastic tissue and necrotic cells both decreased, and the number of bacteria in the tissue decreased as demonstrating that hypersensitive cell death occurred and the containment of bacteria was succeeded. It was found that by inhibitor treatment, photosynthesis contributes to the development of resistance. We considered that salicylic acid pathway did not work because transcription of salicylic acid biosynthesis genes and some pathogen-related protein genes was not promoted in relation to light irradiation and bacterial inoculation. The development of resistance by jasmonic acid treatment confirmed. It was clarified that the signal pathway by jasmonic acid contributes to the light-induced resistance.
  • 只見ブナ林の大気汚染環境とブナのストレス評価
    只見町：「自然首都・只見」学術調査研究助成金
    Date (from‐to) : 2016/04 -2017/03 
    Author : 斎藤 秀之
  • ブナの外的環境による花成誘導のしくみを紐解く
    日本学術振興会：科学研究費助成事業
    Date (from‐to) : 2014/04 -2017/03 
    Author : 大宮泰徳
  • 非モデル生物の応用ゲノミクス研究の教育基盤の形成ならびに人材育成
    北海道大学：平成27年度包括連携等事業助成金
    Date (from‐to) : 2015/04 -2016/03 
    Author : 斎藤 秀之
  • ゲノム網羅的な発現遺伝子を指標にしたブナ林の環境影響評価
    日本学術振興会：科学研究費助成事業 基盤研究（B)
    Date (from‐to) : 2014/04 -2016/03 
    Author : 斎藤 秀之
  • 丹沢のブナ林衰退域おけるブナの発現遺伝子による環境ストレス診断に関する研究
    神奈川県：
    Date (from‐to) : 2012/04 -2015/03 
    Author : 斎藤 秀之
  • 樹木の機能ゲノム学分野の創出に向けたブナ目のリファレンス・ゲノム構築法
    科学研究費助成事業：挑戦的萌芽研究
    Date (from‐to) : 2014 -2015 
    Author : 斎藤 秀之
  • インドネシア泥炭湿地林の保全と炭素管理に関する国際科学協力プログラム
    科学技術振興機構（JST）／国際協力機構(JICA)：地球規模課題国際協力事業（ＳＡＴＲＥＰＳ）
    Date (from‐to) : 2008 -2013 
    Author : 大崎 満
  • Development of reforestation technique on degraded tropical peat swamp land
    International Collaboration
    Date (from‐to) : 2000 -2013
  • 地域住民の知恵を取り込む生物多様性の保全・修復研究プロジェクトのあり方―インドネシア泥炭湿地林の事例―
    科学技術振興機構（JST）／国際協力機構(JICA)：地球規模課題対応国際科学協力事業（SATREPS) 特定型課題形成調査【若手FS】
    Date (from‐to) : 2011/04 -2012/03 
    Author : 塩寺さとみ
  • ボルネオの環境問題を見て考えるスタディーツアー
    科学技術振興機構（JST）／国際協力機構(JICA)：地球規模課題対応国際科学協力事業（SATREPS)
    Date (from‐to) : 2011/04 -2012/03 
    Author : 山本浩一
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2012 -2012 
    Author : SAITO Hideyuki, SESE Jun
     
    To advance the functional genomics of non-model woody plant, Fagus crenata (Fagaceae), an ecologically important tree species, two studies was conducted as follows; (1) DNA microarray created from a F. crenata cDNA sequence data-set is examined if versatile tool to study transcriptome comparing among intraspecific variations or not, and (2) F. crenata draft genome was generated. The transcriptome analysis by using the F. crenata DNA microarray was available for three populations, Kuromatsunai in Hokkaido Island, Tanzawa and Fuji in Honshu Island, suggesting the method is versatile in F. crenata. A draft genome of F. crenata was generated with 442 Mbp (including gap), allowing 48,618 predicted genes. This genomic information of F. crenata would contribute to accelerate the functional genomics of woody plants in family Fagaceae.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2010 -2012 
    Author : HARADA Ko, KOIKE Takayoshi, SAITO Hideuki, KADOMATSU Akihiko
     
    The Japanese oak (Quercus crispula Blume) broadly distributes on the Japanese archipelago and clear genetic structure, which has been derived from genetic differentiation at the glacial refugia populations, has been revealed by chloroplast DNA analysis. We examined phonological changes for the transplanted materials collected from six populations covering broad area of Japan and tested the operation of natural selection for several candidate genes by molecular population genetic methods.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2010 -2011 
    Author : SAITO Hideyuki
     
    We generated 355, 845, 739 sequence from a full-length enriched cDNA library of beech(Fagus crenata) leaves by using 454 next generation sequencer. The DNA microarray for analysis of gene expression of beech leaves was developed, 12, 446 annotated genes and 31, 357 non-annotated genes. The high temperature-, drought-and acidification(H_2O_2)-specific gene expression patterns were found. The soil-drought intensity-and its history-dependent gene expression pattern related to photosynthetic reduction were found. These results suggested that transcriptome analysis will became promising method that provides useful indicators for diagnosis of health and stress of beech leaves.
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(C))
    Date (from‐to) : 2008 -2010 
    Author : Yasunori OHMIYA, Shinji AKADA, Matsuo UEMURA, Hideyuki SAITO
     
    We have isolated Arabidopsis orthologs, constans (CO) and flowering locus T (FT) genes from Japanese beech tree, which are mainly function in flower transition, and their full sequences were identified. Real-Time PCR analysis revealed that CO transcripts are closely related to flowering initiation with high expression level of CO mRNAs during the period in May, a year before flowering. Transgenic Arabidopsis overexpressing CO product represented early flowering phenotype, this is a result of revealing its flowering enhancement function of CO. Their comparisons of nucleotide sequences were p...
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(A))
    Date (from‐to) : 2007 -2010 
    Author : Takashi INOUE, 大崎 満, 橋床 泰之, 俵谷 圭太郎, 原口 昭, Ryusuke HATANO, Takashi HIRANO, Hiroshi TANI, Hideyuki SAITOU, Yutaka TAMAI, Mitsuru OSAKI, Hiroshi HATA, Yasuyuki HASHIDOKO, Yasumitsu URAKI, Keitaro TAWARAYA, Akira HARAGUCHI, Ryuichiro ABE
     
    Tropical peat land is a huge carbon sink involving an ecosystem that is very fragile but rich in biodiversity. This study deployed on establishment of measures for optimum land use and land management based on the viewpoint of control of carbon flow in tropical peatland. Prevention of peat fire, restoration of devastated land, sustainable bioproduction, and the reduction of environment load are the special interest that is rendered for the approach.
  • 気候変動下における東アジアのミズナラの雑種形成と遺伝的多様性および林分動態
    日本学術振興会：二国間交流事業
    Date (from‐to) : 2007/04 -2009/03 
    Author : 斎藤 秀之
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(若手研究(B))
    Date (from‐to) : 2008 -2009 
    Author : Hideyuki SAITO
     
    We firstly generated a normalized and full-length enriched cDNA library of leaves of beech (Fagus crenata Blume). The 5'end one pass sequence for 5,376 clones was analyzed, and 3,629 non-redundant clones were annotated. Second, we evaluated the stability of candidate reference gene mRNA transcript level to seasonal change and various abiotic stresses ; remove of leaf, dry, heat, chilling, hydrogen peroxide, resulting that ef1α and EIF1A were relatively universally available reference gene of F. crenata leave from the different season and stresses. Third, we found abiotic stress-dependent ex...
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(A))
    Date (from‐to) : 2006 -2008 
    Author : Shuichi HASEGAWA, Ryusuke HATANO, Hideyuki SAITO
     
    東シベリアカラマツ成熟林に対する地表火の影響は年降水量により異なり、平年並みでは地表面からの蒸発速度と土壌の貯水量が地表火の影響を受けず、林床植生の焼失で余剰になった土壌水分がカラマツ成熟木に利用されて林冠の炭素固定能力が向上した。しかし、多雨年が続くと地表火跡地の土壌含水率は飽和へ近づき、林冠木の衰退・枯損を誘発して炭素固定機能は低下した。森林衰退の跡地は湿地化が進み、生態系の遷移が沼地化へと不可逆的に移行して温暖化効果の多大なCH4放出源を作り出すことが懸念された
  • 地球温暖化で隔離縮小する韓国の南限エゾマツ集団の遺伝的多様性と更新動態
    日本学術振興会：二国間交流事業
    Date (from‐to) : 2005/04 -2007/03 
    Author : 斎藤 秀之
  • シベリアタイガ永久凍土地帯における環境変動の兆候の広域評価
    先端研究拠点事業
    Date (from‐to) : 2006 -2007 
    Author : 波多野隆介
  • 陸域生態系モデル作成のためのパラメタリゼーションに関する研究
    文部科学省：ﾘｻｰﾁﾘﾎﾞﾘｭｰｼｮﾝRR2002
    Date (from‐to) : 2002 -2007 
    Author : 安岡善文
  • 文部科学省：科学研究費補助金(若手研究(B))
    Date (from‐to) : 2005 -2006 
    Author : 齋藤 秀之
     
    DNAマイクロアレイ技術の基盤整備として、ブナ林冠に着生する葉で発現するmRNAを対象にノーマライズ化した完全長cDNAライブラリーを作成し、約4000クローンを単離して塩基配列を解読し、遺伝子の相同性検索により機能を推定した。この中には、細胞分裂を司る遺伝子であるサイクリンD2様遺伝子も含まれており、ブナの葉サイズの環境応答解析をDNAマイクロアレイ技術で行うための基盤整備の見通しがついた。野外に生育するポプラを対象に、個葉のサイズ決定に関わる遺伝子の発現と植物ホルモンの関わり合いについて調べた。個葉サイズは冬芽中の胚葉から成熟葉までの個葉サイズの成長には、細胞分裂が重要なはたらきをすることがわかった。細胞分裂が盛んな時期は開葉開始から約1週間の期間に限られ、サイクリン遺伝子群(cycA, cycB, cycD)は細胞分裂が盛んな時期に発現量が多かったため、これら3つの遺伝子の発現が細胞分裂の誘因であることを示唆した。活性型サイトカイニン(CK)の総蛙は細胞分裂を開始する前の胚葉で最も多く、細胞分裂が盛んな時期から成熟期へと減少した。BAP浸透処理実験では、サイクリン遺伝子群のmRNA量を増加させた。このことは、開芽期に蓄積していたCKがサイクリン遺伝子の発現の誘因となることを示唆する。したがって、CKは細胞分裂の必要条件ではあるが誘因ではなかったと考えられた。アブシジン酸...
  • 東南アジア湿地生態系の環境保全と土地利用
    日本学術振興会：拠点大学事業
    Date (from‐to) : 2000 -2006 
    Author : 高橋英紀
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(A))
    Date (from‐to) : 2003 -2005 
    Author : Kunihide TAKAHASHI, 斉藤 秀之, 渋谷 正人, 長谷川 周一
     
    The object of this project is to estimate the effects of surface fires on the fixation of carbon dioxide by eastern Siberian taiga and vegetation recovery after a fire. Artificial surface fire was carried out at a mature larch forest near Yakutsk, the capital city of Sakha Republic. Vegetation recovery was observed in two larch forests which burned severely in 2002. The total amount of organic matters burned by the artificial surface fire was 48% of a control site and was estimated low or middle intensity of surface fire. Maximum soil surface temperature was 485℃. Soil temperature at 5cm de...
  • 文部科学省：科学研究費補助金(若手研究(B))
    Date (from‐to) : 2003 -2004 
    Author : 斎藤 秀之
     
    個葉サイズ決定のメルクマールとなる遺伝子発現情報の収集の一環として、第1に、個葉サイズ決定の過程を細胞分裂と細胞肥大の2つの生理過程に大別して、いずれがサイズ決定の主要因であるかを明らかにした。第2に、細胞分裂の律速要因として知られるサイクリンD遺伝子に着目して、個葉サイズ決定における細胞分裂頻度の指標性遺伝子としての有効性を検討した。(1)地理的に個葉面積が異なることで知られるブナを対象に、細胞分裂と細胞肥大の決定機構に対する依存度を調べた。黒松内の個葉面積は立山の1.35倍大きく、黒松内の柵状細胞の断面積は立山の1.37倍大きかった。よって、黒松内と立山の個葉面積の違いにおける細胞サイズ依存度は平均で105%であった。立山の個葉面積は筑波の2.70倍大きく、立山の柵状細胞の断面積は筑波と比べて有意差が認められなかった。よって、立山と筑波の個葉面積の違いにおける細胞サイズ依存度は平均で-1%であった。以上の結果から、黒松内、立山、筑波の3個体に見られた個葉面積の違いは、黒松内と立山において細胞肥大が個葉サイズの決定要因としてはたらいているが、立山と筑波においては細胞分裂回数が個葉サイズの違いの決定要因としてはたらいていることが示唆された。以上の通り、サイズ決定機構の主要因が細胞分裂と細胞肥大の2つの場合があることを明らかにした。(2)同様に、海抜高度の異なるブナ林冠で個葉サ...
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2001 -2003 
    Author : Toshitaka KAKUBARI, 斉藤 秀之, 千葉 幸弘, 向井 譲
     
    Naeba beech forest located from 550m to 1600m elevations along the Japan Sea side, at the southern part of Niigata Prefecture, Japan. Beech forest is very important system as a regulation of hydrology and biodiversity at Japanese cool temperate forest zone. Photosynthesis rate was measured by detached method, and sample materials were taken at both sites from Spring to Autumn every two week. We used H.Walz instruments to determine photosynthesis and transpiration at single leaf level at the foot of Naeba Mountain. Specific Leaf Area (SLA), Nutrient and carbon was calculated and analyzed. An...
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2000 -2003 
    Author : Masahiko KADOMATSU, 田代 直明, 岡野 哲郎, 斎藤 秀之, 船越 三朗, 松田 彊, 小林 元, 田代 直明
     
    We investigated Quercus crispula in the provenance test sites set in Hokkaido University Forest (Uryu) / Tokyo University Forest (Yamabe) / Kyushu University Forest (Asyoro). Variation among provenances was found for survival rate / diameter / height in the 20th year. The growth of trees of Uryu and Yamaba was fast in both test sites in Uryu and Yamabe. However, the growths of trees of three provenances were equal in Asyoro site. By the examination of the traits of leaf and acorn / leafing time / chloroplast DNA, it was found that Quercus crispula of western Hokkaido was genetically differe...
  • 温暖化効果ガスに関わる永久凍土攪乱の抑制技術
    JST：戦略的創造研究推進事業
    Date (from‐to) : 1999 -2003 
    Author : 福田正己
  • 樹木の伐採が森林の物質循環と温暖化ガス動態にあたえる影響
    アサヒビール財団：アサヒビール財団研究助成金
    Date (from‐to) : 2001 -2002 
    Author : 澁谷正人
  • 黒松内ブナ林の葉はどうして大きいのか
    黒松内町：ブナセンター賞
    Date (from‐to) : 2000 -2001 
    Author : 斎藤秀之
  • 文部科学省：科学研究費補助金(奨励研究(A))
    Date (from‐to) : 2000 -2001 
    Author : 斎藤 秀之
     
    (1)黒松内ブナ二次林の樹冠における光合成特性の季節変化2000年に引き続き、ブナ樹冠の葉の光合成特性の季節変化を調べた。2001年の5月と6月は雨量が例年と比べて少なく、土壌のpFが2.5を超えて乾燥する日が続いた。2001年6月の光合成能力は2000年6月に比べて低くかった。また葉のカーリングが見られたために、光合成能力が低い原因は土壌水分ストレスによるものと考えられた。その後、7月からは2000年と同様の光合成能力の季節変化を示した。(2)光合成速度の光反応時間光合成特性の決定における遺伝子発現調節の環境シグナルの一つとして、光合成に過剰な光エネルギーが予想される。野外では光強度が大きく変化するため、その変化に追従して光合成速度も変化する。しかし、弱光から強光へ変化したときには、気孔開閉のタイムラグにより、吸収して利用できない過剰な光エネルギー由来の電子が生まれる。そこでブナ陽樹冠と陰樹冠および林床に生育する広葉樹11種の光合成速度の光反応時間を調べた。ブナ陰樹冠と林床の広葉樹は反応時間が10分ほどであり、ブナ陽樹冠では20分ほどであった。陽葉と陰葉では光合成に利用できない過剰な光エネルギーを受ける時間が異なるため、この間の過剰電子の行方と、遺伝子発現との関連性を調べる必要があることがわかった。(3)アブラムシの吸汁が葉の光合成能力とRuBisCO含有量に与える影響ブナ...

Social Contribution

  • 文部科学省スーパーサイエンスハイスクール（SSH）講演会
    Date (from-to) : 2016/12
    Role : Lecturer
    Sponser, Organizer, Publisher  : 札幌西高等学校
  • ボルネオの環境問題を見て考えるスタディーツアー
    Date (from-to) : 2012/03/03-2012/03/09
    Role : Lecturer
    Sponser, Organizer, Publisher  : 科学技術振興機構 地球規模課題対応国際科学技術協力プログラムSATREPS
  • Photosynthesis, (I) research and scale, (II) The importance of photosynthetic research in ecosystem ecology, (III) Principle of photosynthesis measurement, especially gas-exchange chamber method.
    Date (from-to) : 2010/03/29
    Role : Lecturer
    Sponser, Organizer, Publisher  : Invited lecture in Department of Forestry, Palangka Raya University
  • Photosynthetic research toward understanding ecosystem behavior. Why and how do we measure leaf photosynthesis?
    Date (from-to) : 2009/08/01-2009/08/08
    Role : Lecturer
    Sponser, Organizer, Publisher  : GCOE Field Science Short Course at Yakutsk, Russia, Taiga forest ecosystem on permafrost -- Role of permafrost zone in a global change
  • シベリア森林大火災
    Date (from-to) : 2003/09/11
    Role : Informant
    Sponser, Organizer, Publisher  : NHK
    Event, Program, Title : 現代の映像
  • 「日本一大きいブナ葉」のなぞに迫る
    Date (from-to) : 2001/05/25
    Role : Advisor
    Sponser, Organizer, Publisher  : 北海道新聞
    Event, Program, Title : 北海道新聞 朝刊

Media Coverage

  • 加速する地球温暖化「シベリアの永久凍土に異変が・・・
    Date : 2009/11/30
    Publisher, broadcasting station: テレビ朝日
    Program, newspaper magazine: 報道ステーション
    Media report
  • シリーズ地球温暖化 森林破壊を食い止めろ
    Date : 2007/12/10
    Publisher, broadcasting station: NHK
    Program, newspaper magazine: クローズアップ現代
    Media report
  • シベリアタイガの森林火災
    Date : 2002/12/02
    Publisher, broadcasting station: NHK
    Program, newspaper magazine: NHK教育テレビETV2002
    Media report

Academic Contribution

  • 北海道発・食と農の未来にむけた意見交換会
    Date (from-to) :2015/08/21
    Organizer, responsible person: 農学研究院連携促進事業
  • 現場主義にもとづく持続可能な農村づくり～農学研究院と道内自治体の連携活動の実績から～
    Date (from-to) :2013/11/01
    Role: Panel chair etc
    Organizer, responsible person: 第一回農学研究院地域連携企画
  • 崩壊する地球生態系を救えるか？生態炭素と生物多様性の鍵－熱帯泥炭・森林－
    Date (from-to) :2010/10/30
    Organizer, responsible person: 北海道大学差す手なビリティー・ウィーク2010 市民講座

Copyright © MEDIA FUSION Co.,Ltd. All rights reserved.