Short-term High Temperature Effects on Stomatal Behaviors of Rice Plants. Ⅱ. Occurring at the Grain-filling Stage

短期高溫處理對水稻氣孔表現之效應Ⅱ．穀粒充實期

楊純明(Chwen-Ming Yang) ； James L. Heilman

《中華農業研究》 40卷2期 (1991/06) Pp. 243-247

https://doi.org/10.29951/JARC.199106.0013

摘要

本試驗在控制環境下，觀測水稻(Oryza sativa L.)穀粒充實期間短期高溫處理（35℃，8天）對於氣孔運動之影響，並探究溫度處理後氣孔之表現。結果顯示，高溫提高處理期間之氣孔傳導度，但不影響其每日週期性之行為，此一溫度處理間（25℃及35℃）之差異呈現平行趨勢，而以光期中段相差最大。短期高溫亦造成處理後氣孔傳導度之降低，直至收穫為止。該現象對碳素平衡與穀粒充實，乃至產量，產生深遠影響。本試驗同時發現，穀粒充實期間水稻葉片在控制環境下經溫度處理後仍具有氣孔運動。

關鍵字

高溫處理 ； 氣孔行為 ； 水稻 ； Oryza sativa L. ； 穀粒充實期 ； 控制環境

並列摘要

Effects of a short period (8 days) of high temperature (35 C) relative to 25 C, occurring at the grain-filling stage (from the 8th to 15th day from heading) on stomatal behaviors of rice plants (Oryza sativa L.) were studied under controlled environment. The results showed that high temperature stimulated the opening of stomata yet preserved the diurnal pattern of stomatal variations during the course of treatment. A near parallel fashion between the curves of temperature treatments was observed and the difference was most distinguished in the middle part of photoperiod, After treatments, heat-treated plants had lower stomatal conductances until harvest. This phenomenon may affect carbon balance and grain-filling processes and hence yield production.

並列關鍵字

high temperature effect ； stomatal behavior ； conductance ； rice ； oryza sativa L. ； grain-filling stage