数字农科院2.0

Heterologous expression of the Di19 gene from the B subgenome in Brassica napus enhances plant resistance to multiple abiotic and biotic stressors

文献类型： 外文期刊

作者： Nian Liu; Xingchao Sun; Yanqi Yang; Hongfang Liu; Jinglin Liu; Jing Liu; Ming Zheng; Wei Hua

关键词： Di19; Brassica napus; B subgenome; drought; waterlogging; Sclerotinia sclerotiorum

期刊名称： Plant Communications

ISSN： 2590-3462

年卷期： 2025 年

页码：

收录情况： SCIE（2025版） ; ; CSCD（2025-2026年度）

摘要： Gene duplication and loss are prevalent to plant kingdom, and contribute to phenotypic diversification and adaptation for plants. But plenty of resistant genes were lost during allopolyploidization and domestication in Brassica napus. Here, we innovatively investigated gene loss events that happened in B. napus compared to stress resistant species like B. carinata and B. juncea in Brasscia, and found that a crucial resistant gene Di19 was lost in A and C subgenomes in B. napus. Our study showed that heterologous expression of Di19 in rapeseed could confer multiple resistances to abiotic stresses (including drought and waterlogging) as well as biotic stress (Sclerotinia sclerotiorum), and stabilized the seed oil contents, showing the huge potential of Di19 in genetic improvement of B. napus with multi-resistance for riceoilseed rape rotation system along Yangtze River. We found that Di19 could promote the transcriptional activity of BnaPR genes in stress responses. Thus, our research enlarges the understanding of polyploidy domestication and gene regulation in Brassica, provides a promising Di19 gene for B. napus genetic improvement, and develops a new approach for stress resistance improvement in Brassica.

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