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Roles of melatonin in abiotic stress resistance in plants

2014; Oxford University Press; Volume: 66; Issue: 3 Linguagem: Inglês

10.1093/jxb/eru336

1460-2431

Na Zhang, Qianqian Sun, Haijun Zhang, Yunyun Cao, Sarah Weeda, Shuxin Ren, Yang‐Dong Guo,

Photosynthetic Processes and Mechanisms

In recent years melatonin has emerged as a research highlight in plant studies. Melatonin has different functions in many aspects of plant growth and development. The most frequently mentioned functions of melatonin are related to abiotic stresses such as drought, radiation, extreme temperature, and chemical stresses. This review mainly focuses on the regulatory effects of melatonin when plants face harsh environmental conditions. Evidence indicates that environmental stress can increase the level of endogenous melatonin in plants. Overexpression of the melatonin biosynthetic genes elevates melatonin levels in transgenic plants. The transgenic plants show enhanced tolerance to abiotic stresses. Exogenously applied melatonin can also improve the ability of plants to tolerate abiotic stresses. The mechanisms by which melatonin alleviates abiotic stresses are discussed.