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

文献类型: 外文期刊

第一作者: Chen, GX

作者: Chen, GX;Liu, SH;Zhang, CJ;Lu, CG

作者机构:

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

期刊名称:PHOTOSYNTHETICA ( 影响因子:3.189; 五年影响因子:3.38 )

ISSN: 0300-3604

年卷期: 2004 年 42 卷 4 期

页码:

收录情况: SCI

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.

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