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Melatonin seed priming improves early establishment and water stress tolerance of peanut.
- Source :
-
Plant physiology and biochemistry : PPB [Plant Physiol Biochem] 2024 Jun; Vol. 211, pp. 108664. Date of Electronic Publication: 2024 Apr 29. - Publication Year :
- 2024
-
Abstract
- Water stress is a major cause of yield loss in peanut cultivation. Melatonin seed priming has been used to enhance stress tolerance in several crops, but not in peanut. We investigated the impact of seed priming with melatonin on the growth, development, and drought tolerance of two peanut cultivars, TUFRunner™ '511', a drought tolerant cultivar, and New Mexico Valencia A, a drought sensitive cultivar. Peanut seed priming tests using variable rates of melatonin (0-200 μM), indicated that 50 μM of melatonin resulted in more uniform seed germination and improved seedling growth in both cultivars under non stress conditions. Seed priming with melatonin also promoted vegetative growth, as evidenced by higher whole-plant transpiration, net CO <subscript>2</subscript> assimilation, and root water uptake under both well-watered and water stress conditions in both cultivars. Higher antioxidant activity and protective osmolyte accumulation, lower reactive oxygen species accumulation and membrane damage were observed in primed compared with non-primed plants. Seed priming with melatonin induced a growth promoting effect that was more evident under well-watered conditions for TUFRunnner™ '511', whereas for New Mexico Valencia A, major differences in physiological responses were observed under water stress conditions. New Mexico Valencia A primed plants exhibited a more sensitized stress response, with faster down-regulation of photosynthesis and transpiration compared with non-primed plants. The results demonstrate that melatonin seed priming has significant potential to improve early establishment and promote growth of peanut under optimal conditions, while also improve stress tolerance during water stress.<br />Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2024 Elsevier Masson SAS. All rights reserved.)
- Subjects :
- Water metabolism
Germination drug effects
Antioxidants metabolism
Droughts
Photosynthesis drug effects
Stress, Physiological drug effects
Seedlings drug effects
Seedlings growth & development
Melatonin pharmacology
Melatonin metabolism
Arachis drug effects
Arachis growth & development
Arachis metabolism
Arachis physiology
Seeds drug effects
Seeds growth & development
Dehydration
Subjects
Details
- Language :
- English
- ISSN :
- 1873-2690
- Volume :
- 211
- Database :
- MEDLINE
- Journal :
- Plant physiology and biochemistry : PPB
- Publication Type :
- Academic Journal
- Accession number :
- 38703498
- Full Text :
- https://doi.org/10.1016/j.plaphy.2024.108664