Abstract
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 O2 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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This revised version was published online in March 2005 with corrections to the page numbers.
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Chen, GX., Liu, SH., Zhang, CJ. et al. Effects of drought on photosynthetic characteristics of flag leaves of a newly-developed super-high-yield rice hybrid. Photosynthetica 42, 573–578 (2004). https://doi.org/10.1007/S11099-005-0015-0
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DOI: https://doi.org/10.1007/S11099-005-0015-0