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Genomic Organization and Expression Profiling of GOLDEN2-like Transcription Factor Genes in Eggplant and Their Role in Heat Stresses

文献类型： 外文期刊

作者： Yu, Chuying 1 ; Xiang, Rui 1 ; Jiang, Yaqin 1 ; Li, Weiliu 1 ; Yang, Qihong 1 ; Gan, Guiyun 1 ; Cai, Liangyu 1 ; Wang, Peng 1 ; Li, Wenjia 1 ; Wang, Yikui 1 ;

作者机构： 1.Guangxi Acad Agr Sci, Inst Vegetable Res, Nanning 530007, Peoples R China

关键词： eggplant; GOLDEN2-LIKE; abiotic stress; expression profiles

期刊名称：HORTICULTURAE （ 影响因子：3.0； 五年影响因子：3.2 ）

ISSN：

年卷期： 2024 年 10 卷 9 期

页码：

收录情况： SCI

摘要： GOLDEN2-like (GLK) transcription factor genes are involved in chloroplast biogenesis during all stages of plant growth and development, as well as in the response to biotic and abiotic stresses. However, little is known about this transcription factor family in eggplant. In this study, we identified 54 GLK genes in the eggplant genome (S. melongena L.) and classified them into seven groups (G1-G7). Structural analysis illustrated that the SmGLK proteins of specific groups are relatively conserved. Cis-acting elements indicated that these genes are likely to be involved in multiple responses stimulated by light, phytohormones, and abiotic stress. Collinear analysis indicated that expansion of the SmGLK gene family primarily occurred through segmental duplication. Tissue-specific expression analysis revealed that SmGLKs were preferentially expressed in leaves, fruits, and seeds. Further screening of SmGLK genes revealed their differential expression under various treatments. Notably, SmGLK18 was significantly responsive to multiple phytohormones and stress treatments, whereas SmGLK3 and SmGLK12 were highly induced by ABA, IAA, SA, and drought treatments. Our study provides new information on the eggplant GLK family systematically and comprehensively. For the first time, we propose that SmGLK18 may play a key role in improving heat resistance. This study provides valuable candidate gene resources for further functional research and will benefit eggplant molecular breeding.

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