Growth regulation mechanisms in higher plants under microgravity conditions: Changes in cell wall metabolism

• Material Type: 文書・図像類
• Title: Growth regulation mechanisms in higher plants under microgravity conditions: Changes in cell wall metabolism
• Author/Editor: 保尊, 隆享; 神阪, 盛一郎; 若林, 和幸; 曽我, 康一; 田渕, 彰; 徳本, 勇人; 岡村, 久仁子; 中村, 由紀子; 森, 竜志; 谷本, 英一; Hoson, Takayuki; Kamisaka, Seiichiro; Wakabayashi, Kazuyuki; Soga, Koichi; Tabuchi, Akira; Tokumoto, Hayato; Okamura, Kuniko; Nakamura, Yukiko; Mori, Ryuji; Tanimoto, Eiichi
• Author Heading: 保尊, 隆享; 神阪, 盛一郎; 若林, 和幸; 曽我, 康一; 田渕, 彰; 徳本, 勇人; 岡村, 久仁子; 中村, 由紀子; 森, 竜志; 谷本, 英一; Hoson, Takayuki; Kamisaka, Seiichiro; Wakabayashi, Kazuyuki; Soga, Koichi; Tabuchi, Akira; Tokumoto, Hayato; Okamura, Kuniko; Nakamura, Yukiko; Mori, Ryuji; Tanimoto, Eiichi
• Publication, Distribution, etc.: 宇宙開発事業団
• Publication Date: 2000-07-14
• Publication Date (W3CDTF): 2000-07-14
• Alternative Title: 微小重力下での高等植物の生長制御機構:細胞壁代謝の変化
• Periodical title: 宇宙開発事業団技術報告 = NASDA Technical Memorandum
• Pages: 29-50
• ISSN (Periodical Title): ISSN : 1345-7888
• Text Language Code: eng
• Subject Heading: STS-95; 微小重力; Oryza sativa L.; Arabidopsis thaliana L.; 伸長生長; 屈曲; 形態形成; 細胞壁伸展; 細胞壁多糖類; 細胞壁酵素; 代謝; 背腹性; ジベレリン; エチレン; 宇宙輸送システム; STS 95; microgravity; elongation growth; curvature; morphogenesis; cell wall extensibility; cell wall polysaccharide; cell wall enzyme; metabolism; dorsiventrality; gibberellin; ethylene; Space Transportation System
• Target Audience: 一般
• Note (General): スペースシャトルによるSTS-95(宇宙輸送システム)実験において、宇宙の微小重力下でイネ属植物2種(Oryza sativa L. cv. Koshihikariとcv. Tan-ginbozu)および十字花科Arabidopsis属植物2種(Arabidopsis thaliana L. Cv. Columbiaとcv. etr1-1)の苗条を68.5、91.5、および136hr生育した後、細胞壁の性質、生長状態および形態形成の変化を解析した。宇宙空間では、イネ子葉鞘とArabidopsis胚軸の伸長生長が影響を受け、特に細胞壁の非可逆的な伸展性が増加した。細胞壁構成要素の量、構造および物理化学的性質の解析から、細胞壁多糖類の濃度と分子量の減少が誘導されたことが示され、この結果、細胞壁の伸展性が増加した可能性がある。宇宙空間においては、細胞壁多糖類の代謝に反応する特定の細胞壁酵素活性が増大した。また微小重力条件下では自発的な形態形成がおこった。すなわち、イネ子葉鞘は向軸屈曲を示したが、一方、Arabidopsis胚軸は無秩序に伸張した。さらに、宇宙におけるイネの自発的な屈曲は、細胞壁凹凸部間の性質の非均質的変容が導いたことを示した。; During Space Shuttle STS (Space Transportation System)-95 mission, seedlings of rice (Oryza sativa L. cv. Koshihikari and cv. Tan-ginbozu) and Arabidopsis (Arabidopsis thaliana L. Cv. Columbia and cv. etr1-1) were cultivated for 68.5, 91.5, and 136 hr on board, and then analyzed changes in the nature of their cell walls, growth, and morphogenesis under microgravity conditions. In space, elongation growth of both rice coleoptiles and Arabidopsis hypocotyls was stimulated. Also, the increase in the cell wall extensibility, especially that in the irreversible extensibility, was observed for such materials. The analyses of the amounts, the structure, and the physicochemical properties of the cell wall constituents indicated that the decreases in levels and molecular masses of cell wall polysaccharides were induced under microgravity conditions, which appeared to contribute to the increase in the wall extensibility. The activity of certain wall enzymes responsible for the metabolic turnover of the wall polysaccharides was increased in space. By the space flight, the occurrence of automorphogenesis of both seedlings was also confirmed under microgravity conditions; rice coleoptiles showed an adaxial bending, whereas Arabidopsis hypocotyls elongated in random directions. Furthermore, it was shown that spontaneous curvatures of rice coleoptiles in space were brought about uneven modifications of cell wall properties between the convex and the concave sides.; 資料番号: AA0003840004; レポート番号: NASDA-TMR-000004E
• Access Restrictions: 限定公開
• Periodical Title (NCID): AN00364784; https://ci.nii.ac.jp/ncid/AN00364784
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ