• 作者： 高景輝
• 中文摘要： 本研究係探討?度與去莢對大豆植株葉片老化之影響。供試之大豆品種?十石。大豆開花後11天（約?莢之充實期，Pod-fill stage)去莢可抑制葉片老化。去莢後可使大豆植株?生新花。因此，大豆植株之葉片老化似乎是由發育中之莢果 而非花所引起。與高?（日?30℃ ，夜?25℃)比較，低?（日?20℃ ，夜?15℃)可延緩帶莢植株之葉片老化。?度處 理不會改變去莢對大豆植株葉片老化之效應。大豆植株去莢後不會使植株由生殖生長轉變?營養生長。高?處理大豆植株 三星期，其種子?量低於低?處理者。種子?量低之可能原因?莢果在未成熟前?落。低?處理使收穫期延後一星期。大 豆植株葉片老化與種子?量間之因果關係在文中有詳細之討論。
• 英文摘要： Leaf senescence is completely prevented by the removal of pods at pod-fill stage, which was 11 days after flowering. Pod removal increases the initiation of new flowers. Thus, leaf senescence is triggered by the developing pods or seeds, but not by flowers. Compared with high temperature (30蚓 for day and 25蚓 for night), low temperature (20蚓 for day and 15蚓 for night) retards leaf senescence of podded plants. Temperature treatments do not alter the effect of pod removal in retarding leaf senescence. The plant does not seem to switch from reproductive to vegetative growth after pod removal. Plants treated with high temperature at pod-fill stage for three weeks have lower seed yield and more pods shed than those with low temperature. The longevity of plants treated with low temperature was increased by one week.
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