Effect of exogenous methanol on glycolate oxidase and photorespiratory intermediates in cotton

Application of methanol (MeOH) inhibits photorespiration and enhances growth and yield in C 3 plants. However, the underlying cellular and molecular mechanisms are not clear. In this study, we investigated the effects of foliar application of MeOH (30%, v/v) on glycolate oxidase (GO) activity and ph...

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Bibliographic Details
Published in:Journal of experimental botany 2014-10, Vol.65 (18), p.5331-5338
Main Authors: Bai, Yan-Ru, Yang, Ping, Su, Yuan-Yuan, He, Zong-Ling, Ti, Xiao-Nan
Format: Article
Language:English
Subjects:
Alcohol Oxidoreductases - metabolism
Cotton
Glycolates
Glyoxylates
Gossypium - drug effects
Gossypium - enzymology
Leaves
Methanol - pharmacology
Oxidases
Oxidation-Reduction - drug effects
Photorespiration
Photosynthesis
Plant physiology
RESEARCH PAPER
Signal Transduction - drug effects
Vascular plants
Weather conditions
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Summary:Application of methanol (MeOH) inhibits photorespiration and enhances growth and yield in C 3 plants. However, the underlying cellular and molecular mechanisms are not clear. In this study, we investigated the effects of foliar application of MeOH (30%, v/v) on glycolate oxidase (GO) activity and photorespiratory intermediates in cotton leaves in a field experiment. MeOH treatment significantly inhibited GO activity (by 30% compared with the controls). We also found that endogenous glyoxylate, a photorespiratory intermediate, increased and glycine decreased significantly in MeOH-treated plants. Serine increased significantly in MeOH-treated plants. These results thus demonstrated that exogenous MeOH can modulate GO activity and the production of photorespiratory intermediates, and sheds new lights on our current understanding of how exogenous MeOH inhibits photorespiration and enhances the growth and yield of C 3 plants such as cotton.
ISSN:0022-0957
1460-2431
DOI:10.1093/jxb/eru294