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GA Metabolism-related Gene Family SlGA2ox is Regulated by Ethylene and ABA During Tomato (Solanum lycopersicum) Fruit Ripening |
CHEN Xi-Tong, YANG Jun, HE Zhuo-Yuan, ZENG Wen-Jing, ZHOU Jia-Yan, WANG Qian, ZOU Jian* |
Key Laboratory of Southwest Wildlife Resources Protection (Ministry of Education), China West Normal University, Nanchong 637009, China |
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Abstract Fruit ripening is regulated by a variety of plant hormones, such as ethylene, abscisic acid (ABA) and gibberellin (GA), and ripening-related genes. SlGA2ox (SlGA2-oxidase) family are key genes for regulating GA metabolism and play significant role in regulating tomato (Solanum lycopersicum) fruit ripening. Nevertheless, the specific role of SlGA2ox in maturation-related GA metabolism and its interaction with ethylene and ABA remain unclear. In this study, 15 SlGA2ox genes were screened based on the tomato genome database, and the role of SlGA2ox during maturation process was explored through promoter element prediction, gene expression analysis, and the response analysis to GA, ethylene and ABA. The results showed that 12 SlGA2ox genes were closely related to tomato fruit ripening. Among them, SlGA2ox2, SlGA2ox5, SlGA2ox6 and SlGA2ox8 might be regulated by ethylene in the process of mediating GA metabolism, while SlGA2ox4 and SlGA2ox5 might be regulated by ABA at the same time. In addition, SlGA2ox5 was regulated by both ABA and ethylene signals, so it might be a key gene in the fruit ripening which was regulated jointly by the 3 hormones. The present study provides basic material for in-depth exploration of the genes related to tomato fruit ripening regulation, and provides important clues for exploring the molecular mechanism of tomato fruit ripening regulation.
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Received: 10 May 2022
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Corresponding Authors:
*zoujian@cwnu.edu.cn
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