文献类型： 外文期刊

作者： Liu, Mei ¹ ; Kang, Baoshan ¹ ; Wu, Huijie ¹ ; Peng, Bin ¹ ; Liu, Liming ¹ ; Hong, Ni ² ; Gu, Qinsheng ¹ ;

作者机构： 1.Chinese Acad Agr Sci, Zhengzhou Fruit Res Inst, Henan Key Lab Fruit & Cucurbit Biol, Zhengzhou, Henan, Peoples R China

2.Huazhong Agr Univ, Coll Plant Sci & Technol, Key Lab Plant Pathol Hubei Prov, Wuhan, Peoples R China

3.Chinese Acad Agr Sci, Zhongyuan Res Ctr, Xinxiang, Henan, Peoples R China

4.Xinjiang Acad Agr Sci, Inst Plant Protect, Urumqi, Xinjiang, Peoples R China

关键词： ethylene; ClACO5; cucumber green mottle mosaic virus; ClWRKY70 regulation; watermelon

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.6； 五年影响因子：6.8 ）

ISSN： 1664-462X

年卷期： 2024 年 14 卷

页码：

收录情况： SCI

摘要： Introduction: Ethylene (ET) is involved in plant responses to viral infection. However, its molecular mechanisms and regulatory network remain largely unknown.Methods and results: In the present study, we report that cucumber green mottle mosaic virus (CGMMV) in watermelon (Citrullus lanatus) triggers ET production by inducing the expression of ClACO5, a key gene of the ET biosynthesis pathway through transcriptome data analysis and gene function validation. The knock-down of ClACO5 expression through virus-induced gene silencing in watermelon and overexpressing ClACO5 in transgenic Nicotiana benthamiana indicated that ClACO5 positively regulates CGMMV resistance and ET biosynthesis. The salicylic acid-responsive transcription factor gene ClWRKY70 shares a similar expression pattern with ClACO5. We demonstrate that ClWRKY70 directly binds to the W-box cis-element in the ClACO5 promoter and enhances its transcription. In addition, ClWRKY70 enhances plant responses to CGMMV infection by regulating ClACO5 expression in watermelon.Discussion: Our results demonstrate that the ClWRKY70-ClACO5 module positively regulates resistance to CGMMV infection in watermelon, shedding new light on the molecular basis of ET accumulation in watermelon in response to CGMMV infection.