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Comprehensive analysis of MAPK cascade genes in sorghum (Sorghum bicolor L.) reveals SbMPK14 as a potential target for drought sensitivity regulation

文献类型： 外文期刊

作者： Zhou, Miaoyi 1 ; Zhao, Bingbing 2 ; Li, Hanshuai 1 ; Ren, Wen 1 ; Zhang, Qian 1 ; Liu, Ya 1 ; Zhao, Jiuran 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Maize Res Inst, Beijing Key Lab Maize DNA Fingerprinting & Mol Br, Beijing 100097, Peoples R China

2.Jiangxi Agr Univ, Coll Agron, Nanchang 330046, Jiangxi, Peoples R China

3.Yangtze Univ, Coll Life Sci, Jingzhou 434025, Hubei, Peoples R China

关键词： Drought tolerance; MAPK; Sorghum bicolor L

期刊名称：GENOMICS （ 影响因子：4.31； 五年影响因子：4.38 ）

ISSN： 0888-7543

年卷期： 2022 年 114 卷 2 期

页码：

收录情况： SCI

摘要： The mitogen-activated protein kinase (MAPK) cascade plays a crucial role in regulating many important biological processes in plants. Here, we identified and characterized eight MAPKK and 49 MAPKKK genes in sorghum and analyzed their differential expression under drought treatment; we also characterized 16 sorghum MAPK genes. RNA-seq analysis revealed that 10 MAPK cascade genes were involved in drought stress response at the transcriptome level in sorghum. Overexpression of SbMPK14 in Arabidopsis and maize resulted in hypersensitivity to drought by promoting water loss, indicating that SbMPK14 functions as a negative regulator of the drought response. Subsequent transcriptome analysis and qRT-PCR verification of maize SbMPK14 over expression lines revealed that SbMPK14 likely increases plant drought sensitivity by suppressing the activity of specific ERF and WRKY transcription factors. This comprehensive study provides valuable insight into the mechanistic basis of MAPK cascade gene function and their responses to drought in sorghum.

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