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相關文獻
- Mechanism of Seedling Establishment of Direct-Seeded Rice (Oryza sativa L.) Under Lowland Conditions
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- 植物在缺氧逆境下之適應調節
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題名 | Mechanism of Seedling Establishment of Direct-Seeded Rice (Oryza sativa L.) Under Lowland Conditions=低地狀況下直播水稻(Oryza sativa L.)幼苗建立的機制 |
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作者 | Biswas,J. K.; Yamauchi,M.; | 書刊名 | Botanical Bulletin of Academia Sinica |
卷期 | 38:1 1997.01[民86.01] |
頁次 | 頁29-32 |
分類號 | 434.111 |
關鍵詞 | 缺氧逆境; 芽鞘; 直接播種水稻; 低地水稻; 中胚軸; 幼苗建立; Anaerobic stress; Coleoptile; Direct seeded rice; Lowland rice; Mesocotyl; Seedling establishment; |
語文 | 英文(English) |
英文摘要 | 改良低地狀況下,對直播水稻的栽培而言,水稻幼苗的建立機制是一項重要因素 。 為了研究此一機制,發芽 36 小時之下列各基因型水稻幼苗:ASD 1, IR41996-50-2-1-3 , Mahsuri 以及 IR72, 在國際水稻研究所 (IRRI) 的人工控制氣侯室 (最高 / 最低溫 :29/21 ℃ ), 分別在低地和排水良好的土壤環境下栽植 10 天。 在栽植 4 天後,基因型 ASD1, IR41996-50-2-1-3 兩型水稻的芽鞘尖端能穿透減薄過的土壤層,到達通氧水層, 使 得氧氣的輸送系統建立。 隨後,中胚軸和初生葉隨著生長;但根的生長在栽植 6 天後仍受 到抑制。雖然,此二型水稻的生長有著相同之次序,但二者組織對缺氧逆境的耐度則有明顯 差異。Mahsuri 和 IR72 兩基因型水稻因無法將芽鞘伸長至通氧水層,而無法在低地的缺氧 逆境下,確立幼苗的持續生長。 inhibited up to 6 days after seeding. ASDl and IR41996-50-2-1-3 essentially followed the same sequence of growth, but there was an apparent difference in the tolerance of their tissue to oxygen deficit. Mahsuri and IR72 could not elongate their coleoptiles up to the oxygenated water and thus failed to establish prolonged seeding growth under lowland conditions. |
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