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Coronatine enhances drought tolerance via improving antioxidative capacity to maintaining higher photosynthetic performance in soybean.
- Source :
-
Plant science : an international journal of experimental plant biology [Plant Sci] 2013 Sep; Vol. 210, pp. 1-9. Date of Electronic Publication: 2013 May 17. - Publication Year :
- 2013
-
Abstract
- Coronatine (COR), a structural and functional mimic of jasmonates, is involved in a wide array of effects on plant development and defence responses. This study was conducted to explore the role of exogenously applied COR in alleviating the adversities of drought stress in soybean. COR treatment markedly increased the activities of antioxidant enzymes and proline content, and reduced the accumulation of malondialdehyde and hydrogen peroxide under drought stress. Thus, COR-treated plants had higher leaf relative water content and lower electrolye leakage, which led to higher chlorophyll content, activities of RuBPCase and PEPCase, and net photosynthetic rate compared to control plants exposed to drought. COR also increased maximal efficiency of PS II photochemical reaction and photochemical quenching coefficient, but decreased non-photochemical quenching coefficient. These beneficial effects led to enhanced photosynthetic performance and the translocation of assimilated (14)C which promoted growth and accumulation of dry biomass in COR-treated soybean plants subjected to drought. Interestingly, COR application did not affect the growth and biomass accumulation under well-watered condition. These results suggested the involvement of COR on improving drought tolerance in soybean by modulating antioxidant systems and membrane stability to maintain higher photosynthetic performance.<br /> (Crown Copyright © 2013. Published by Elsevier Ireland Ltd. All rights reserved.)
- Subjects :
- Antioxidants metabolism
Biomass
Carbon Radioisotopes analysis
Catalase metabolism
Chlorophyll metabolism
Droughts
Fluorescence
Hydrogen Peroxide metabolism
Lipid Peroxidation
Malondialdehyde metabolism
Phosphoenolpyruvate Carboxylase drug effects
Phosphoenolpyruvate Carboxylase metabolism
Plant Leaves drug effects
Plant Leaves enzymology
Plant Leaves growth & development
Plant Leaves physiology
Plant Transpiration drug effects
Ribulose-Bisphosphate Carboxylase drug effects
Ribulose-Bisphosphate Carboxylase metabolism
Glycine max enzymology
Glycine max growth & development
Glycine max physiology
Water metabolism
Amino Acids pharmacology
Indenes pharmacology
Photosynthesis drug effects
Glycine max drug effects
Stress, Physiological drug effects
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2259
- Volume :
- 210
- Database :
- MEDLINE
- Journal :
- Plant science : an international journal of experimental plant biology
- Publication Type :
- Academic Journal
- Accession number :
- 23849108
- Full Text :
- https://doi.org/10.1016/j.plantsci.2013.05.006