Genome-Wide Characterization of Cucumber (Cucumis sativus L.) GRAS Genes and Their Response to Various Abiotic Stresses

文献类型： 外文期刊

第一作者： Li, Caixia

作者： Li, Caixia;Dong, Shaoyun;Liu, Xiaoping;Bo, Kailiang;Miao, Han;Zhang, Shengping;Gu, Xingfang;Beckles, Diane M.

作者机构：

关键词： cucumber; GRAS; gene expression; abiotic stress; phytohormone

期刊名称：HORTICULTURAE （ 影响因子：2.331； 五年影响因子：2.951 ）

ISSN：

年卷期： 2020 年 6 卷 4 期

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收录情况： SCI

摘要： The GRAS (gibberellic acid insensitive, repressor of GAI, and scarecrow) proteins are a family of plant-specific transcription factors that regulate plant growth, development, and stress response. Currently, the role of GRAS transcription factors in various abiotic stress responses has not been systematically studied in cucumber (Cucumis sativus L.), a popular vegetable crop. Here, we provide a comprehensive bioinformatics analysis of the 35 GRAS genes identified in the cucumber genome. In this study, cucumber genotypes, i.e., "CG104", which is stress-tolerant, and genotype "CG37", which is stress-sensitive, were examined to provide insight on potential differences in the GRAS-regulated abiotic stress pathways. Transcriptional analysis by RNA-seq or qRT-PCR of these two genotypes revealed common and divergent functions of CsGRAS genes regulated by low and high temperatures, salinity, and by exposure to the phytohormones gibberellin (GA) and abscisic acid (ABA). Notably, CsGRAS2 (DELLA) and CsGRAS26 (LISCL) were regulated by all abiotic stresses and hormone treatments, suggesting that they may function in the biological cross-talk between multiple signaling pathways. This study provides candidate genes for improving cucumber tolerance to various environmental stresses.

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