光合作用过程中光诱导的快速吸收变化

Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects Pub Date : 1964-09-25 DOI:10.1016/0926-6577(64)90185-8

Bacon Ke

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引用次数: 16

摘要

新鲜叶绿体经适量洋地黄苷处理后，在紫外波段和远红色区域产生光诱导吸收变化。抗坏血酸增强吸收变化，铁氰化物消除吸收变化。洋地黄苷处理的叶绿体的光-暗差谱与Kok报道的色素复合物p700的光-暗差谱非常一致。二氯酚似乎不介导抗坏血酸和光氧化叶绿素复合物之间的电子传递，而吩那嗪甲硫代硫酸盐，取决于其浓度，极大地改变了抗坏血酸还原色素复合物的动力学。

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Light-induced rapid absorption changes during photosynthesis

Fresh chloroplasts treated with appropriate amounts of digitonin give light-induced absorption changes in the Soret-band and far-red regions. The absorption changes are enhanced by ascorbate and eliminated by ferricyanide. The light-minus-dark difference spectrum of digitonin-treated chloroplasts agrees closely with that of the pigment complex P 700 reported by Kok. Dichlorophenolindophenol does not appear to mediate in the electron transfer between ascorbate and the photooxidized chlorophyll complex, whereas phenazine methosulfate, depending on its concentration, greately modifies the kinetics of the re-duction of the pigment complex by ascorbate.

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Biochimica et Biophysica Acta (BBA) - Specialized Section on Biophysical Subjects

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