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Position: Home > Articles > Current research and future directions of melatonin's role in seed germination Stress Biology 2023,3 (1)

Current research and future directions of melatonin's role in seed germination

作  者：
Ze Liu;Haibin Dai;Hao Jiang;Rongrong Li;Xiaojun Pu;Miao Guan;Qi Che
单  位：
Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Chin;Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China
关键词：
ABA;GA;Melatonin;Metabolism;Normal conditions;ROS;Seed germination;Stressful condition
摘  要：
Seed germination is a complex process regulated by internal and external factors. Melatonin (N-acetyl-5-methoxytryptamine) is a ubiquitous signaling molecule, playing an important role in regulating seed germination under normal and stressful conditions. In this review, we aim to provide a comprehensive overview on melatonin's effects on seed germination on the basis of existing literature. Under normal conditions, exogenous high levels of melatonin can suppress or delay seed germination, suggesting that melatonin may play a role in maintaining seed dormancy and preventing premature germination. Conversely, under stressful conditions (e.g., high salinity, drought, and extreme temperatures), melatonin has been found to accelerate seed germination. Melatonin can modulate the expression of genes involved in ABA and GA metabolism, thereby influencing the balance of these hormones and affecting the ABA/GA ratio. Melatonin has been shown to modulate ROS accumulation and nutrient mobilization, which can impact the germination process. In conclusion, melatonin can inhibit germination under normal conditions while promoting germination under stressful conditions via regulating the ABA/GA ratios, ROS levels, and metabolic enzyme activity. Further research in this area will deepen our understanding of melatonin's intricate role in seed germination and may contribute to the development of improved seed treatments and agricultural practices.

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