Inhibition of photosystem II photochemistry by Cr is caused by the alteration of both D1 protein and oxygen evolving complex

被引：61

作者：

Ali, Nadia Ait ^{[1
]}

Dewez, David ^{[1
]}

Didur, Olivier ^{[1
]}

Popovic, Radovan ^{[1
]}

机构：

[1] Univ Quebec, Dept Chim, Environm Toxicol Res Ctr, TOXEN, Montreal, PQ H2X 2J6, Canada

来源：

PHOTOSYNTHESIS RESEARCH | 2006年 / 89卷 / 2-3期

基金：

加拿大自然科学与工程研究理事会;

关键词：

photosystem II electron transport; D1; protein; oxygen-evolving complex; chromium; PEA fluorometry;

D O I：

10.1007/s11120-006-9085-5

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The effect of chromium (Cr) on photosystem II (PSII) electron transport and the change of proteins content within PSII complex were investigated. When Lemna gibba was exposed to Cr during 96 h, growth inhibition was found to be associated with an alteration of the PSII electron transport at both PSII oxidizing and reducing sides. Investigation of fluorescence yields at transients K, J, I, and P suggested for Cr inhibitory effect to be located at the oxygen-evolving complex and Q(A) reduction. Those Cr-inhibitory effects were related to the change of the turnover of PSII D1 protein and the alteration of 24 and 33 kDa proteins of the oxygen-evolving complex. The inhibition of the PSII electron transport and the formation of reactive oxygen species induced by Cr were highly correlated with the decrease in the content of D1 protein and the amount of 24 and 33 kDa proteins. Therefore, functional alteration of PSII activity by Cr was closely related with the structural change within PSII complex.

引用

页码：81 / 87

页数：7

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