ISSN 0371-0874, CN 31-1352/Q

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田间小麦叶片光合效率日变化与光合“午睡”的关系

许大全, 丁勇, 武海

中国科学院上海植物生理研究所;中国科学院西北高原生物研究所

摘要

小麦灌浆初期叶片(旗叶)光合效率的中午下降并非都伴随着光合“午睡”现象。当两者同时发生时, 胞间CO_(2)浓度降低,而光合速率与气孔导度,胞间CO_(2)浓度之间的相关性高于光合速率与光合效率之间的相关性。这些事实表明, 即使光合效率中午下降是光合“午睡”的部分原因, 但较之气孔中午关闭只是一个次要原因。图5参7

关键词: 光合效率; 光合作用; 午睡; 小麦

Relationship between diurnal variations of photosynthetic efficiency and midday depression of photosynthetic rate in wheat leaves under field conditions

Xu Daquan, Ding Yong, Wu Hai

Shanghai Inst. Plant Physiol., Acad. Sin.;NW Plateau Inst. Biol., Acad. Sin.

Abstract

Key words: Midday deptession of photosynthesis;Photosynthetic rate;Photosynthetic efficiency;Stomatal conductance

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引用本文:

许大全, 丁勇, 武海. 田间小麦叶片光合效率日变化与光合“午睡”的关系[J]. 生理学报 1992; 44 (3): .

Xu Daquan, Ding Yong, Wu Hai. Relationship between diurnal variations of photosynthetic efficiency and midday depression of photosynthetic rate in wheat leaves under field conditions. Acta Physiol Sin 1992; 44 (3): (in Chinese with English abstract).