数字农科院2.0

Comprehensive genome-wide identification of Snf2 gene family and their expression profile under salt stress in six Brassica species of U’s triangle model

文献类型： 外文期刊

作者： Fang Qian;Dan Zuo;Yujun Xue;Wenjie Guan;Naseeb Ullah;Jiarong Zhu;Guangqin Cai;Bin Zhu;Xiaoming Wu

作者机构：

关键词： Brassica species;Gene expression;RNA-seq;Salt stress;Snf2 genes

期刊名称： Planta

ISSN： 0032-0935

年卷期： 2024 年 260 卷 2 期

页码：

收录情况： SCIE（2024版）

摘要： Main conclusion: We comprehensively identified and analyzed the Snf2 gene family. Some Snf2 genes were involved in responding to salt stress based on the RNA-seq and qRT-PCR analysis. Abstract: Sucrose nonfermenting 2 (Snf2) proteins are core components of chromatin remodeling complexes that not only alter DNA accessibility using the energy of ATP hydrolysis, but also play a critical regulatory role in growth, development, and stress response in eukaryotes. However, the comparative study of Snf2 gene family in the six Brassica species in U’s triangle model remains unclear. Here, a total of 405 Snf2 genes were identified, comprising 53, 50, and 46 in the diploid progenitors: Brassica rapa (AA, 2n = 20), Brassica nigra (BB, 2n = 16), and Brassica oleracea (CC, 2n = 18), and 93, 91, and 72 in the allotetraploid: Brassica juncea (AABB, 2n = 36), Brassica napus (AACC, 2n = 38), and Brassica carinata (BBCC, 2n = 34), respectively. These genes were classified into six clades and further divided into 18 subfamilies based on their conserved motifs and domains. Intriguingly, these genes showed highly conserved chromosomal distributions and gene structures, indicating that few dynamic changes occurred during the polyploidization. The duplication modes of the six Brassica species were diverse, and the expansion of most Snf2 in Brassica occurred primarily through dispersed duplication (DSD) events. Additionally, the majority of Snf2 genes were under purifying selection during polyploidization, and some Snf2 genes were associated with various abiotic stresses. Both RNA-seq and qRT-PCR analysis showed that the expression of BnaSnf2 genes was significantly induced under salt stress, implying their involvement in salt tolerance response in Brassica species. The results provide a comprehensive understanding of the Snf2 genes in U’s triangle model species, which will facilitate further functional analysis of the Snf2 genes in Brassica plants.

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