微小重力下における電界印加による根茎の伸長抑制
| Autor: | Wolverton, Chris, Mullen, Jack L., Evans, Michael L., Aizawa, Sachiko, Yoshizaki, Izumi, Kamigaichi, Shigeki, Mukai, Chiaki, Shimazu, Toru, Fukui, Keiji, Ishikawa, Hideo |
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| Jazyk: | angličtina |
| Rok vydání: | 2000 |
| Předmět: | |
| Zdroj: | 宇宙開発事業団技術報告 = NASDA Technical Memorandum. :12-17 |
| ISSN: | 1345-7888 |
| Popis: | 電界印加条件下で根茎は2方向へ屈曲伸長する。この反応特性および特異的な生長制御機構解明の目的で、微小重力下で生育するマメ根茎に電界を印加した。微小重力下における根茎の成長率は地上対照実験を上回った。電界を印加した直後に根茎の伸長は抑制された。結果は重力刺激がない場合に電界印加に対する根茎の感受性が増加することを示唆する。実験結果を重力刺激と根茎における特異的な細胞伸長制御との関連で議論する。 Roots grown in an applied electric field demonstrate a bidirectional curvature. To further understand the nature of this response and its implications for the regulation of differential growth, an electric field was applied to roots growing in microgravity. It was found that growth rates of roots in microgravity were higher than growth rates of ground controls. Immediately upon application of the electric field, root elongation was inhibited. This result is interpreted as an indication that, in the absence of a gravity stimulus, the sensitivity of the root to an applied electric stimulus is increased. Further space experiments are required to determine the extent to which this sensitivity is shifted. The implications of this result are discussed in relation to gravitropic signaling and the regulation of differential cell elongation in the root. 資料番号: AA0003840002 レポート番号: NASDA-TMR-000004E |
| Databáze: | OpenAIRE |
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