Ethylene enhances resistance to cucumber green mottle mosaic virus via the ClWRKY70 - ClACO5 module in watermelon plants

Ethylene (ET) is involved in plant responses to viral infection. However, its molecular mechanisms and regulatory network remain largely unknown. In the present study, we report that cucumber green mottle mosaic virus (CGMMV) in watermelon ( ) triggers ET production by inducing the expression of , a...

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Published inFrontiers in plant science Vol. 14; p. 1332037
Main Authors Liu, Mei, Kang, Baoshan, Wu, Huijie, Peng, Bin, Liu, Liming, Hong, Ni, Gu, Qinsheng
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Media S.A 11.01.2024
Subjects
ClACO5
ClWRKY70 regulation
cucumber green mottle mosaic virus
ethylene
Plant Science
watermelon
cucumber green mottle mosaic virus
ClWRKY70 regulation
watermelon
ClACO5
ethylene
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Summary:Ethylene (ET) is involved in plant responses to viral infection. However, its molecular mechanisms and regulatory network remain largely unknown. In the present study, we report that cucumber green mottle mosaic virus (CGMMV) in watermelon ( ) triggers ET production by inducing the expression of , a key gene of the ET biosynthesis pathway through transcriptome data analysis and gene function validation. The knock-down of expression through virus-induced gene silencing in watermelon and overexpressing in transgenic indicated that ClACO5 positively regulates CGMMV resistance and ET biosynthesis. The salicylic acid-responsive transcription factor gene shares a similar expression pattern with . We demonstrate that directly binds to the W-box -element in the promoter and enhances its transcription. In addition, enhances plant responses to CGMMV infection by regulating expression in watermelon. Our results demonstrate that the - 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.
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Edited by: Maite F. S. Vaslin, Federal University of Rio de Janeiro, Brazil
Tong Zhang, South China Agricultural University, China
Reviewed by: Ragunathan Devendran, Martin Luther University of Halle-Wittenberg, Germany
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2023.1332037