Transcriptomics and metabolomics profiling reveals involvement of flavonoids in early nodulation of Caucasian clover (Trifolium ambiguum)

文献类型： 外文期刊

第一作者： Liu, Jiawei

作者： Liu, Jiawei;Wang, Mingjiu;Zhao, Yan;Cao, Kefan;Hao, Xinyan;Suo, Rongzhen;Zhang, Huimin;Liu, Jiawei;Wang, Mingjiu;Zhao, Yan;Cao, Kefan;Hao, Xinyan;Suo, Rongzhen;Zhang, Huimin;He, Lijun;Wang, Xiaolong

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关键词： Caucasian clover; Nodulation; Transcriptomics; Metabolomics; Flavonoid

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：6.5； 五年影响因子：6.4 ）

ISSN： 0981-9428

年卷期： 2023 年 203 卷

页码：

收录情况： SCI

摘要： Caucasian clover (Trifolium ambiguum) is a perennial rooted and tillering leguminous forage with strong adaptability, outstanding stress tolerance and other preferable traits. However, the specificity with rhizobia limits the extended application of Caucasian clover. Therefore, it is important to study the changes of genes and metabolites in the early process of nodulation in Caucasian clover to improve its nodulation and nitrogen fixation ability. In this study, we used Caucasian clover as the experimental material to investigate its nodulation mechanism using transcriptomic and metabolomic approaches, such that to break the nitrogen fixation barrier for the promotion of Caucasian clover. Metabolomic and transcriptomic profiling revealed that both DAMs and DEGs were significantly enriched in the phenylpropanoid and flavonoid biosynthetic pathways, with DEGs showing up-regulation at 3 days and 6 days post inoculation (dpi) with rhizobia, and some DEGs showing downregulation at 9 dpi. Accumulation of flavonoids was significantly increased at both 3 dpi and 6 dpi, and some compounds were significantly decreased at 9 dpi. A total of 35 DEGs were involved in flavonoid synthesis by WGCNA analysis, among which HCT, CCR, COMT and F3H played an important role. This study provides insights in understanding the molecular mechanism of nodulation and nitrogen fixation in Caucasian clover.

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