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Melatonin delays leaf senescence and enhances salt stress tolerance in rice
- Source :
- Journal of Pineal Research. 59:91-101
- Publication Year :
- 2015
- Publisher :
- Wiley, 2015.
-
Abstract
- Melatonin, an antioxidant in both animals and plants, has been reported to have beneficial effects on the aging process. It was also suggested to play a role in extending longevity and enhancing abiotic stress resistance in plant. In this study, we demonstrate that melatonin acts as a potent agent to delay leaf senescence and cell death in rice. Treatments with melatonin significantly reduced chlorophyll degradation, suppressed the transcripts of senescence-associated genes, delayed the leaf senescence, and enhanced salt stress tolerance. Genome-wide expression profiling by RNA sequencing reveals that melatonin is a potent free radical scavenger, and its exogenous application results in enhanced antioxidant protection. Leaf cell death in noe1, a mutant with over-produced H2O2, can be relieved by exogenous application of melatonin. These data demonstrate that melatonin delays the leaf senescence and cell death and also enhances abiotic stress tolerance via directly or indirectly counteracting the cellular accumulation of H2O2.
- Subjects :
- Senescence
Aging
Programmed cell death
Antioxidant
medicine.medical_treatment
Molecular Sequence Data
Mutant
Sodium Chloride
Biology
Transcriptome
Melatonin
Endocrinology
Gene Expression Regulation, Plant
medicine
Abiotic stress
fungi
food and beverages
Oryza
Hydrogen Peroxide
Free radical scavenger
Cell biology
Plant Leaves
Biochemistry
hormones, hormone substitutes, and hormone antagonists
medicine.drug
Subjects
Details
- ISSN :
- 07423098
- Volume :
- 59
- Database :
- OpenAIRE
- Journal :
- Journal of Pineal Research
- Accession number :
- edsair.doi.dedup.....3f2acf8d6c705bd0bcd9d90b045eba8e