The metabolomic and transcriptomic analysis reveals that Brassica juncea responds to cadmium stress by enhancing pectin and lignin synthesis in roots

文献类型： 外文期刊

第一作者： Peng, Tingyu

作者： Peng, Tingyu;Huang, Zhihao;Yao, Yi;Yang, Zhen;Sun, Zhenzhen;Dong, Xujie;Peng, Jiqing;Zeng, Chaozhen;Liu, Zhixiang;Liu, Lili;Yan, Mingli

作者机构：

关键词： Brassica juncea; Cell wall; Cadmium stress; Lignin; Pectin

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.9； 五年影响因子：4.3 ）

ISSN： 0304-4238

年卷期： 2024 年 337 卷

页码：

收录情况： SCI

摘要： Brassica juncea possesses the capacity to tolerate and accumulate various heavy metals. The cell wall is the first barrier to inhibit heavy metals into the plant cytoplasm. In this work, we investigated the effects of cadmium (Cd) exposure on lignin and pectin synthesis in B. juncea roots by integrated metabolomic and transcriptomic analyses. The findings showed that the contents of lignin and pectin, the activities of phenylalanine ammonialyase, laccase, superoxide dismutase, and peroxidase significantly increased following Cd stress, while the activity of pectinesterase decreased. Transcriptome analysis revealed 94 (20 upregulated and 74 downregulated) and 10 (7 upregulated and 3 downregulated) differentially expressed genes in the phenylpropane metabolic pathway and galactose metabolic pathway, respectively. Additionally, metabolomic analyses revealed differentially expressed metabolites related to lignin and pectin synthesis, including N-acetyl-D-phenylalanine, sinapyl alcohol, eugenol, galactosylglycerol, 2-keto-3-deoxy-D-gluconic acid, sucrose, and lactose 6-phosphate, implying lignin and pectin in cell wall play vital roles in Cd detoxification. Our results offer a molecular-scale perspective for further exploring the adaptability in Cd-exposed plants.

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