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

  • Q. Z. Hou
  • Y. P. Wang
  • J. Y. Liang
  • L. Y. Jia
  • H. Q. Feng
  • J. Wen
  • N. Ehmet
  • J. Y. Bai
Article
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Abstract

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.

Additional key words

excess light hydrogen peroxide photosystem II salicylic acid 

Abbreviations

AOX

alternative oxidase

Chl

chlorophyll

EL

excess light

HEPES

4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid

LL

low light

NahG

salicylate hydroxylase gene

SA

salicylic acid

SHAM

salicylhydroxamic acid

TES

N-tris-hydroxymethyl-methyl-2-aminoethanesulphonic acid

Valt

capacity of the mitochondrial alternative respiratory pathway.

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Copyright information

© The Institute of Experimental Botany 2018

Authors and Affiliations

  • Q. Z. Hou
    • 1
  • Y. P. Wang
    • 2
  • J. Y. Liang
    • 1
  • L. Y. Jia
    • 1
  • H. Q. Feng
    • 1
  • J. Wen
    • 1
  • N. Ehmet
    • 1
  • J. Y. Bai
    • 1
  1. 1.College of Life ScienceNorthwest Normal UniversityLanzhou, Gansu ProvinceChina
  2. 2.Institute of Modern PhysicsChinese Academy of SciencesLanzhouChina

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