Effect of cell water amount on photosynthetic yield in the cyanobacterium Nostoc flagelliforme and involvement of NADPH dehydrogenase-mediated cyclic electron transport
Effect of cell water amount on photosynthetic yield in the cyanobacterium Nostoc flagelliforme and involvement of NADPH dehydrogenase-mediated cyclic electron transport
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细胞水量对发菜蓝藻光合产量的影响及 NADPH 脱氢酶介导的循环电子传递的参与
DOI：
10.1007/s10811-008-9348-y
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发表时间：
2009-04
影响因子：
3.3
通讯作者：
Ma Weimin
中科院分区：
文献类型：
--
作者：
Mi Hualing;Wei Lanzhen;Wang Quanxi;Ma Weimin
发菜是一种陆生蓝藻，水分是限制其光合作用的重要因素之一。本研究旨在探讨细胞含水量对光合产量的影响以及NADPH脱氢酶（NDH-1）介导的循环电子传递在这种影响中的作用。NDH-1介导的循环电子传递的作用进行了评估，通过测量NDH-1的表达，几个叶绿素荧光参数，和光合O2的演变后，在几个时间点细胞水已再干燥。结果表明，NDH-1介导的循环电子传递的最高速率，反映在光照后叶绿素荧光和NDH-1量的增加，只有当细胞含有约1.8倍的水相对于干重。这与观察到的光合产量的变化，反映了O2进化是一致的。而在氮胁迫条件下，光系统II的光化学活性（Fv/Fm和qP）保持在最高水平。鞭毛状细胞内水含量范围较广。这表明细胞含水量对光合产量的影响与NDH-1介导的循环电子传递有关。这种影响的可能机制进行了讨论。
Nostoc flagelliforme is a terrestrial cyanobacterium, and water is one of the most important factors limiting its photosynthetic yield. The aims of the present study were to investigate the effect of cell water amount on photosynhetic yield and the role of NADPH dehydrogenase (NDH-1)-mediated cyclic electron transport in this effect. The role of NDH-1-mediated cyclic electron transport was assessed by measuring NDH-1 expression, several chlorophyll fluorescence parameters, and photosynthetic O2 evolution at several time points after cell water had been redried. The results indicated that the highest rate of NDH-1-mediated cyclic electron transport, reflected by post-illumination increase in chlorophyll fluorescence and NDH-1 amount, was only obtained when the cells contained about 1.8 times water relative to dry weight. This was consistent with observed changes in photosynthetic yield, reflected by O2 evolution. However, the highest photochemical activity of photosystem II, reflected by Fv/Fm and qP, could be maintained when N. flagelliforme cells included water in a broad range. This implies that the effect of cell water amount on photosynthetic yield is related to NDH-1-mediated cyclic electron transport. The possible mechanisms of this effect are discussed.
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影响因子：
3.7
作者：
SCHREIBER, U;SCHLIWA, U;BILGER, W
通讯作者：
BILGER, W
DOI：
10.1071/pp9960321
发表时间：
1996-01-01
期刊：
AUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY
影响因子：
--
作者：
Hibino, T;Lee, BH;Takabe, T
通讯作者：
Takabe, T
影响因子：
64.8
作者：
U. Laemmli
通讯作者：
U. Laemmli
影响因子：
6.4
作者：
Ma, WM;Mi, HL
通讯作者：
Mi, HL
影响因子：
3.3
作者：
Gao, KS
通讯作者：
Gao, KS