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.
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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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Acknowledgements: This work was funded by the National Natural Science Foundation of China (31560070, 31360044, and 31260059), the Fundamental Research Funds for the Gansu Universities of Gansu Provincial Department of Finance, Science Research Funds for the Gansu Universities (2015A-007), Characteristic Discipline Construction Project of Gansu Province, and Innovation Team Fund of Northwest Normal University (Nwnu-lkqn-14-5).
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Hou, Q.Z., Wang, Y.P., Liang, J.Y. et al. H2O2-induced acclimation of photosystem II to excess light is mediated by alternative respiratory pathway and salicylic acid. Photosynthetica 56, 1154–1160 (2018). https://doi.org/10.1007/s11099-018-0806-8
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DOI: https://doi.org/10.1007/s11099-018-0806-8