Transcript-Wide Identification and Characterization of the BBX Gene Family in Trichosanthes kirilowii and Its Potential Roles in Development and Abiotic Stress

文献类型： 外文期刊

第一作者： Li, Weiwen

作者： Li, Weiwen;Xiong, Rui;Chu, Zhuannan;Peng, Xingxing;Cui, Guangsheng;Dong, Ling;Li, Weiwen;Xiong, Rui;Chu, Zhuannan;Peng, Xingxing;Cui, Guangsheng;Dong, Ling

作者机构：

关键词： phylogenetic analysis; expression patterns; salt stress; drought stress

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2025 年 14 卷 6 期

页码：

收录情况： SCI

摘要： The B-box (BBX) protein has an impact on flowering physiology, photomorphogenesis, shade effects, and responses to both biotic and abiotic stresses. Although recent research described the BBX gene family in numerous plants, knowledge of the BBX gene in Trichosanthes kirilowii was sparse. In this study, we identified a total of 25 TkBBX genes, and phylogenetic analysis showed that these genes were divided into five subfamilies. Analyses of gene structure and motifs for each group found relative conservation. Ka/Ks values showed that most TkBBX genes have undergone negative selection. qRT-PCR analyses revealed that TkBBX1, TkBB4, TkBBX5, TkBBX7, TkBBX15, TkBBX16, TkBBX17, TkBBX19, and TkBBX21 genes respond to salt and drought treatment. Furthermore, we cloned TkBBX7 and TkBBX17 genes and performed a subcellular localization experiment, which revealed that these two genes were both located in the nucleus. Transgenic yeast experiments demonstrated that TkBBX7 and TkBBX17 enhanced yeast tolerance to both salt and drought stresses. These findings provide a theoretical foundation for further investigation on the functions of TkBBX genes in Trichosanthes kirilowii.

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