Photosynthetica 2018, 56(3):884-892 | DOI: 10.1007/s11099-017-0748-6

Effect of melatonin priming on photosynthetic capacity of tomato leaves under low-temperature stress

X. L. Yang1, H. Xu1, D. Li1, X. Gao1, T. L. Li1, R. Wang1,*
1 Key Laboratory of Protected Horticulture of Education Ministry and Liaoning Province, College of Horticulture, Shenyang Agriculture University, Shenyang, China

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 µM 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.

Additional key words: abiotic stress; chemical priming; chlorophyll fluorescence; photoinhibition

Received: December 28, 2016; Accepted: May 10, 2017; Prepublished online: September 1, 2018; Published: August 1, 2018  Show citation

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Yang, X.L., Xu, H., Li, D., Gao, X., Li, T.L., & Wang, R. (2018). Effect of melatonin priming on photosynthetic capacity of tomato leaves under low-temperature stress. Photosynthetica, 56(3), 884-892. doi: 10.1007/s11099-017-0748-6
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