The roles of cell wall polysaccharides in response to waterlogging stress in Brassica napus L. root

文献类型： 外文期刊

第一作者： Li, Jijun

作者： Li, Jijun;Zhang, Yuting;Chen, Yahui;Wang, Yijing;Zhou, Zhihua;Tu, Jinxing;Guo, Liang;Yao, Xuan;Li, Jijun;Chen, Yahui;Guo, Liang;Guo, Liang;Yao, Xuan

作者机构：

关键词： Brassica napus; Waterlogging stress; Root; Cell wall polysaccharides; BnaPGIP2

期刊名称：BMC BIOLOGY （ 影响因子：4.5； 五年影响因子：5.4 ）

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年卷期： 2024 年 22 卷 1 期

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收录情况： SCI

摘要： Background Brassica napus L. (B. napus) is susceptible to waterlogging stress during different cultivation periods. Therefore, it is crucial to enhance the resistance to waterlogging stress to achieve a high and stable yield of B. napus. Results Here we observed significant differences in the responses of two B. napus varieties in root under waterlogging stress. The sensitive variety (23651) exhibited a more pronounced and rapid reduction in cell wall thickness and root integrity compared with the tolerant variety (Santana) under waterlogging stress. By module clustering analysis based on transcriptome data, we identified that cell wall polysaccharide metabolism responded to waterlogging stress in root. It was found that pectin content was significantly reduced in the sensitive variety compared with the tolerant variety. Furthermore, transcriptome analysis revealed that the expression of two homologous genes encoding polygalacturonase-inhibiting protein 2 (PGIP2), involved in polysaccharide metabolic pathways, was highly upregulated in root of the tolerant variety under waterlogging stress. BnaPGIP2s probably confer waterlogging resistance by inhibiting the activity of polygalacturonases (PGs), which in turn reduces the degradation of the pectin backbone polygalacturonic acid. Conclusions Our findings demonstrate that cell wall polysaccharides in root plays a vital role in response to the waterlogging stress and provide a theoretical foundation for breeding waterlogging resistance in B. napus varieties.

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