Journal
CHEMICAL AND BIOLOGICAL TECHNOLOGIES IN AGRICULTURE
Volume 9, Issue 1, Pages -Publisher
SPRINGER
DOI: 10.1186/s40538-021-00272-1
Keywords
Melatonin; Photosynthetic pigments; Chloroplast ultrastructure; Hormone contents; Maize yield; Drought stress
Categories
Funding
- National Natural Science Foundation of China [31760354]
- Natural Science Foundation of Guangxi Province [2019GXNSFAA185028]
- China Postdoctoral Science Foundation Project [2020M683618XB]
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This study optimized the concentration of melatonin to alleviate the detrimental effects of drought stress in maize. The results showed that melatonin treatment significantly improved the growth attributes, chlorophyll contents, photosynthetic rate, and grain yield of maize.
Background: Melatonin played an essential role in numerous vital life processes of animals and captured the interests of plant biologists because of its potent role in plants as well. As far as its possible contribution to photoperiodic processes, melatonin is believed to act as a growth regulator and a direct free radical scavenger/indirect antioxidant. The objective of this study to identify a precise melatonin concentration for a particular application method to improve plant growth requires identification and clarification. Methods: This work establishes unique findings by optimizing melatonin concentration in alleviating the detrimental effects of drought stress in maize. Maize plants were subjected to drought stress (40-45% FC) after treatments of melatonin soil drenching at different concentrations (50, 100, and 150 mu M) to consider the changes of growth attribute, chlorophyll contents, photosynthetic rate, relative water content (RWC), chloroplast ultrastructure, endogenous hormonal mechanism, and grain yield. Results: Our results showed that the application of melatonin treatments remarkably improved the plant growth attributes, chlorophyll contents, photosynthetic rate, RWC, hormonal mechanism, and grain yield plant(-1) under drought conditions at a variable rate. Conclusion: Our current findings hereby confirmed the mitigating potential of melatonin application 100 mu M for drought stress by maintaining plant growth, hormone content, and grain yield of maize. We conclude that the application of melatonin to maize is effective in reducing drought stress tolerance.
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