Regulating the proton budget of higher plant photosynthesis
Regulating the proton budget of higher plant photosynthesis
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DOI：
10.1073/pnas.0503952102
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发表时间：
2005-07-05
影响因子：
11.1
通讯作者：
Kramer, DM
中科院分区：
文献类型：
--
作者：
Avenson, TJ;Cruz, JA;Kramer, DM
在高等植物叶绿体中，类囊体外质子动力既驱动ATP的合成，又通过光合天线调节光捕获以防止光损伤。对野生型和突变株拟南芥质子回路的体内探测表明，光捕获的调节主要通过改变类囊体腔中质子外排的阻力来调节，而通过光系统I周围的循环电子流来调节质子内流，可能在调节光反应的ATP/NADPH输出比中发挥作用。
In higher plant chloroplasts, transthylakoid proton motive force serves both to drive the synthesis of ATP and to regulate light capture by the photosynthetic antenna to prevent photodamage. In vivo probes of the proton circuit in wild-type and a mutant strain of Arabidopsis thaliana show that regulation of light capture is modulated primarily by altering the resistance of proton efflux from the thylakoid lumen, whereas modulation of proton influx through cyclic electron flow around photosystem I is suggested to play a role in regulating the ATP/NADPH output ratio of the light reactions.