Melatonin promotes carotenoid biosynthesis in an ethylene-dependent manner in tomato fruits
文献类型： 外文期刊
作者： Sun, Qianqian 1 ; Liu, Lun 1 ; Zhang, Lei 1 ; Lv, Hongmei 1 ; He, Qing 1 ; Guo, Luqin 1 ; Zhang, Xichun 3 ; He, Hongju 4 ; R 1 ;
作者机构： 1.China Agr Univ, Coll Hort, 2 Yuanmingyuan West Rd, Beijing 100193, Peoples R China
2.Chinese Acad Agr Sci, Inst Food Sci & Technol, Minist Agr, Beijing 100193, Peoples R China
3.Beijing Univ Agr, Coll Plant Sci & Technol, Beijing 102206, Peoples R China
4.Beijing Acad Agr & Forestry Sci, Beijing Vegetable Res Ctr, Beijing, Peoples R China
5.Virginia State Univ, Sch Agr, Petersburg, VA 23806 USA
关键词： Carotenoid; Ethylene; Fruit ripening; Melatonin; Solanum lycopersicum
期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）
ISSN： 0168-9452
年卷期： 2020 年 298 卷
页码：
收录情况： SCI
摘要： In tomato, red color is a key commercial trait and arises from the accumulation of carotenoids. Previous studies have revealed that melatonin promotes lycopene accumulation and ethylene production. However, it is unclear if melatonin similarly increases other carotenoids, and whether any increase of carotenoids in tomato fruit is directly related to ethylene production. In this study, changes in carotenoid profiles during fruit ripening were investigated in control (CK) and in fruits treated with melatonin (M50). The alpha, beta-carotene, and lycopene levels were significantly increased in M50, and there was increased carotenoid biosynthetic gene expression. We also observed up-regulated transcript levels of SlRIN, SlCNR, and SlNOR in M50 compared to CK. To better understand the regulation of carotenoid biosynthesis by melatonin and its potential response to endogenous ethylene, we tested an ethylene-insensitive mutant, Never ripe (Nr). Melatonin-treated Nr failed to accumulate more carotenoids compared to CK, although there was significantly changed ethylene production. Additionally, there was no general upregulation of expression of ripening-related genes in this mutant under melatonin treatment. These results suggest melatonin function might require ethylene to promote carotenoid synthesis in tomato.
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