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Characterization of the Bax Inhibitor-1 Family in Cauliflower and Functional Analysis of BobBIL4

文献类型： 外文期刊

作者： Liu, Xin 1 ; Guo, Ning 2 ; Li, Shasha 1 ; Duan, Mengmeng 2 ; Wang, Guixiang 2 ; Zong, Mei 2 ; Han, Shuo 2 ; Wu, Zihan 2 ; Liu, Fan 2 ; Zhang, Junjie 1 ;

作者机构： 1.Sichuan Agr Univ, Coll Life Sci, 46 Xinkang Rd, Yaan 625014, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Beijing Vegetable Res Ctr, Key Lab Biol & Genet Improvement Hort Crops North, State Key Lab Vegetable Biobreeding,Natl Engn Res, Beijing 100097, Peoples R China

关键词： cauliflower; Bax inhibitor-1; expression pattern; BobBIL4; abiotic stress

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：4.9； 五年影响因子：5.7 ）

ISSN： 1661-6596

年卷期： 2024 年 25 卷 17 期

页码：

收录情况： SCI

摘要： The Bax inhibitor-1 (BI-1) gene family, which is important for plant growth, development, and stress tolerance, remains largely unexplored in cauliflower. In this study, we identified and characterized cauliflower BI-1 family genes. Based on aligned homologous sequences and collinearity with Arabidopsis genes, we identified nine cauliflower BI-1 genes, which encode proteins that varied in length, molecular weight, isoelectric point, and predicted subcellular localization, including the Golgi apparatus, plasma membrane, and various compartments within the chloroplast. Phylogenetic analyses detected evolutionary conservation and divergence among these genes. Ten structural motifs were identified, with Motif 5 found to be crucial for inhibiting apoptosis. According to the cis-regulatory elements in their promoters, these genes likely influence hormone signaling and stress responses. Expression profiles among tissues highlighted the functional diversity of these genes, with particularly high expression levels observed in the silique and root. Focusing on BobBIL4, we investigated its role in brassinosteroid (BR)-mediated root development and salt stress tolerance. BobBIL4 expression levels increased in response to BR and salt treatments. The functional characterization of this gene in Arabidopsis revealed that it enhances root growth and salinity tolerance. These findings provide insights into BI-1 gene functions in cauliflower while also highlighting the potential utility of BobBIL4 for improving crop stress resistance.

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