Effects of drought on photosynthetic characteristics of flag leaves of a newly-developed super-high-yield rice hybrid

被引：41

作者：

Chen, GX ^{[1
]}

Liu, SH

Zhang, CJ

Lu, CG

机构：

[1] Nanjing Normal Univ, Coll Life Sci, Nanjing 210097, Peoples R China

[2] Jiangsu Acad Agr Sci, Nanjing 210014, Peoples R China

来源：

PHOTOSYNTHETICA | 2004年 / 42卷 / 04期

基金：

中国国家自然科学基金;

关键词：

chloroplast ultrastructure; hill-reaction; Oryza sativa; photophosphorylation; photosynthetic O-2 evolution; membrane lipids; water stress;

D O I：

10.1007/S11099-005-0015-0

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

We investigated responses of chloroplasts from flag leaves of a newly-developed super-high-yield rice (Oryza sativa L.) hybrid LiangYouPeiJiu (LYPJ) to water stress (withholding irrigation) during the grain-filling period. In the early stage of water stress (0-6 d) only the activity of Hill reaction was inhibited, whereas activities of photophosphorylation and Ca2+-ATPase, and ATP content were increased and peaked in the day 6 of withholding irrigation. In the late stage of water stress (6-12 d), the activities of photosynthetic 02 evolution, Hill reaction, photophosphorylation, and Ca2+-ATPase, and ATP content were significantly reduced. The membrane lipid content was sharply decreased, especially of sulfoquinovosyl-diacylglycerol (SQDG) and phosphatidylglycerol (PG). The changes in the ultrastructure of chloroplasts included mainly a decrease in number of grana and increase in number of osmiophilic granules.

引用

页码：573 / 578

页数：6

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