WRKY transcription factor MaWRKY49 positively regulates pectate lyase genes during fruit ripening of Musa acuminata
文献类型： 外文期刊
作者： Liu, Fan 1 ; Dou, Tongxin 1 ; Hu, Chunhua 1 ; Zhong, Qiufeng 1 ; Sheng, Ou 1 ; Yang, Qiaosong 1 ; Deng, Guiming 1 ; He, Weidi 1 ; Gao, Huijun 1 ; Li, Chunyu 1 ; Dong, Tao 1 ; Liu, Siwen 1 ; Yi, Ganjun 1 ; Bi, Fangcheng 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Key Lab South Subtrop Fruit Biol & Genet Resource, Minist Agr & Rural Affairs,Inst Fruit Tree Res, Guangdong Prov Key Lab Trop & Subtrop Fruit Tree, Guangzhou, Peoples R China
2.South China Agr Univ, Coll Life Sci, Guangzhou, Peoples R China
关键词： Banana; Fruit ripening; MaWRKY49; Pectate lyase
期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：6.5； 五年影响因子：6.4 ）
ISSN： 0981-9428
年卷期： 2023 年 194 卷
页码：
收录情况： SCI
摘要： Fruit ripening is the last phase of fruit growth and development. The initiation and progression of fruit ripening are highly modulated by a plethora of key genes, such as transcription factor (TF) genes. The WRKY gene family is a large group of TFs that play important roles in various cellular processes; nevertheless, the role of WRKY TF on fruit ripening remains enigmatic. Here, we report that a banana WRKY TF, MaWRKY49 functions in ethylene-induced fruit ripening by modulating the expression of fruit softening-related genes. We found that the expression of MaWRKY49 is highly induced by ethephon and inhibited by 1-methylcyclopropene, which is synchronous with the ripening process. Moreover, based on transcriptome data on fruit ripening, two pectate lyase (PL) genes that are involved in fruit softening were determined, and their expression pattern is also consistent with the fruit ripening process. Yeast one-hybrid and dual-luciferase assay confirmed that MaWRKY49 activated the transcription of two PL genes. In addition, transient overexpression of MaWRKY49 in banana fruits can apparently accelerate fruit ripening processs. Taken together, our findings indicate that MaWRKY49 acts as a potential modulator of fruit ripening by direct regulation of PL expression. This work contributes to developing the technology for improving the shelf-life of banana fruit.
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