RELATIONSHIP BETWEEN THE QUANTUM EFFICIENCIES OF PHOTOSYSTEM-I AND PHOTOSYSTEM-II IN PEA LEAVES
RELATIONSHIP BETWEEN THE QUANTUM EFFICIENCIES OF PHOTOSYSTEM-I AND PHOTOSYSTEM-II IN PEA LEAVES
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DOI：
10.1104/pp.90.3.1029
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发表时间：
1989-07-01
期刊：
影响因子：
7.4
通讯作者：
BAKER, NR
中科院分区：
文献类型：
--
作者：
HARBINSON, J;GENTY, B;BAKER, NR
测定了两种豌豆（Pisum sativum [L.]）光系统I和II效率对辐照度的依赖性。在寒冷条件下生长的豌豆品种是在温暖条件下生长的豌豆品种。这两个光系统的效率下降，随着辐照度的增加，所有的植物，和光系统I电子传递的量子效率密切相关的光系统II电子传递的量子效率。与光系统效率所表现出的一致模式相反，光系统II的氧化还原状态（从叶绿素荧光的光化学猝灭系数估计）表现出与光照和P-700的减少随生长环境和基因型而变化的关系。这种变化被认为是在光系统II的量子效率的调制的背景下，由光化学和非光化学猝灭的激发能。
The irradiance dependence of the efficiencies of photosystems I and II were measured for two pea (Pisum sativum [L.]) varieties grown under cold conditions of one pea variety grown under warm conditions. The efficiencies of both photosystems declined with increasing irradiance for all plants, and the quantum efficiency of photosystem I electron transport was closely correlated with the quantum efficiency of photosystem II electron transport. In contrast to the consistent pattern shown by efficiency of the photosystems, the redox state of photosystem II (as estimated from the photochemical quenching coefficient of chlorophyll fluorescence) exhibited relationships with both irradiance and the reduction of P-700 that varied with growth environment and genotype. This variability is considered in the context of the modulation of photosystem II quantum efficiency by both photochemical and nonphotochemical quenching of excitation energy.