Photosynthetica, 2018 (vol. 56), issue 4

Photosynthetica 2018, 56(4):1154-1160 | DOI: 10.1007/s11099-018-0806-8

H2O2-induced acclimation of photosystem II to excess light is mediated by alternative respiratory pathway and salicylic acid

Q. Z. Hou1, Y. P. Wang2, J. Y. Liang1, L. Y. Jia1, H. Q. Feng1,*, J. Wen1, N. Ehmet1, J. Y. Bai1
1 College of Life Science, Northwest Normal University, Lanzhou, Gansu Province, China
2 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China

Acclimation to excess light is required for optimizing plant performance under natural environment. The present work showed that the treatment of Arabidopsis leaves with exogenous H2O2 can increase the acclimation of PSII to excess light. Treatments with H2O2 also enhanced the capacity of the mitochondrial alternative respiratory pathway and salicylic acid (SA) content. Our work also showed that the lack in alternative oxidase (AOX1a) in AtAOX1a antisense line and the SA deficiency in NahG (salicylate hydroxylase gene) transgenic mutant attenuated the H2O2-induced acclimation of PSII to excess light. It indicates that the H2O2-induced acclimation of PSII to excess light could be mediated by the alternative respiratory pathway and SA.

Keywords: excess light; hydrogen peroxide; photosystem II; salicylic acid

Received: March 15, 2017; Accepted: August 18, 2017; Prepublished online: December 1, 2018; Published: November 1, 2018Show citation

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Hou, Q.Z., Wang, Y.P., Liang, J.Y., Jia, L.Y., Feng, H.Q., Wen, J., Ehmet, N., & Bai, J.Y. (2018). H2O2-induced acclimation of photosystem II to excess light is mediated by alternative respiratory pathway and salicylic acid. Photosynthetica, 56(4), 1154-1160. doi: 10.1007/s11099-018-0806-8.
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