文献类型： 外文期刊
作者： Song, Yunbo 1 ; Liang, Hanzhi 3 ; Peng, Jiechun 3 ; Ding, Shenghua 1 ; Duan, Xuewu 3 ; Shan, Yang 1 ;
作者机构： 1.Hunan Univ, Coll Biol, Longping Branch, Changsha 410125, Peoples R China
2.Hunan Acad Agr Sci, Hunan Agr Prod Proc Inst, Hunan Prov Key Lab Fruits & Vegetables Storage Pro, Changsha 410125, Peoples R China
3.Chinese Acad Sci, South China Bot Garden, Guangzhou 510650, Peoples R China
关键词： tomato; fruit ripening; L-cysteine hydrochloride; redox regulation; transcription regulation
期刊名称：FOODS （ 影响因子：5.2； 五年影响因子：5.5 ）
ISSN：
年卷期： 2024 年 13 卷 6 期
页码：
收录情况： SCI
摘要： Fruit ripening is controlled by internal factors such as hormones and genetic regulators, as well as external environmental factors. However, the impact of redox regulation on fruit ripening remains elusive. Here, we explored the effects of L-cysteine hydrochloride (LCH), an antioxidant, on tomato fruit ripening and elucidated the underlying mechanism. The application of LCH effectively delayed tomato fruit ripening, leading to the suppression of carotenoid and lycopene biosynthesis and chlorophyll degradation, and a delayed respiration peak. Moreover, LCH-treated fruit exhibited reduced hydrogen peroxide (H2O2) accumulation and increased activities of superoxide dismutase (SOD), catalase (CAT), and monodehydroascorbate reductase (MDHAR), compared with control fruit. Furthermore, transcriptome analysis revealed that a substantial number of genes related to ethylene biosynthesis (ACS2, ACS4, ACO1, ACO3), carotenoid biosynthesis (PSY, PDS, ZDS, CRTISO), cell wall degradation (PG1/2, PL, TBG4, XTH4), and ripening-related regulators (RIN, NOR, AP2a, DML2) were downregulated by LCH, resulting in delayed ripening. These findings suggest that the application of LCH delays the ripening of harvested tomato fruit by modulating the redox balance and suppressing the expression of ripening-related genes.
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