Journal
PHOTOSYNTHETICA
Volume 56, Issue 3, Pages 884-892Publisher
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.1007/s11099-017-0748-6
Keywords
abiotic stress; chemical priming; chlorophyll fluorescence; photoinhibition
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Funding
- National Key Research Program of China [2016YFD0201004]
- National Natural Science Foundation of China [31301813]
- China Agriculture Research System [CARS-25]
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Melatonin has different functions in plant growth and development, especially in the protection of plants suffering from various forms of abiotic stress. We explored the effect of melatonin priming on photosynthetic activity of tomato (Lycopersicon esculentum L.) leaves. Our results showed that 100 A mu M is the optimal concentration used for alleviation of the damage to photosynthetic apparatus. Melatonin priming both in the form of leaf spray and direct root application was found to reduce the damage to photosynthetic apparatus, and increase the electron transfer rate and quantum yield of PSI and PSII photochemistry, to protect the thylakoid membrane from damage caused by low-temperature stress. Our study provides fundamental information for further research on the molecular mechanism of melatonin function in regulating photosynthesis.
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