Metabolomics and Transcriptomics Jointly Explore the Mechanism of Pod Color Variation in Purple Pod Pea
文献类型： 外文期刊
作者： Zhong, Xiaojuan 1 ; Yang, Mei 1 ; Zhang, Xiaoyan 2 ; Fan, Yuanfang 1 ; Wang, Xianshu 1 ; Xiang, Chao 1 ;
作者机构： 1.Sichuan Acad Agr Sci, Environm Friendly Crop Germplasm Innovat & Genet I, Crop Res Inst, Chengdu 610066, Peoples R China
2.Qingdao Acad Agr Sci, Qingdao 266100, Peoples R China
关键词：
期刊名称：CURRENT ISSUES IN MOLECULAR BIOLOGY （ 影响因子：3.0； 五年影响因子：3.2 ）
ISSN： 1467-3037
年卷期： 2025 年 47 卷 2 期
页码：
收录情况： SCI
摘要： Although the pod color was one of the seven characteristics Mendel studied in peas, the mechanism of color variation in peas with purple pods has not been reported. This study systemically analyzed the difference between two pea accessions with green pods (GPs) and purple pods (PPs) at two pod developmental stages from the metabolome and transcriptome levels, aiming to preliminarily explore the mechanism and of color variation in PPs and screen out the candidate genes. A total of 180 differentially accumulated metabolites (DAMs) belonged to seven flavonoid subgroups and 23 flavonoid-related differentially expressed genes (DEGs) were identified from the analysis of the KEGG (Kyoto Encyclopedia of Genes and Genomes) pathway enrichment, respectively. Among the 180 flavonoid metabolites, ten anthocyanin compounds, which were the principal pigments in PPs and might be the major reason for the purple color formation, were significantly up-accumulated in both of the different pod development stages of PPs. A transcriptome analysis revealed that eight genes encoding enzymes (C4H, CHI, F3H, F3'H, F3'5'H, DFR, ANS, and FLS) involved in the flavonoid synthesis pathway were significantly upregulated in PPs and finally resulted in the significant accumulation of flavonoid and anthocyanin metabolites. The joint analysis of two omics and a weighted gene co-expression network analysis (WGCNA) also screened out that the WD-40 protein-encoding gene, one WRKY and three MYB transcription factor genes exhibited significant upregulation in PPs, and highly correlated with several structural genes in flavonoid synthesis pathways, indicating that these genes are involved in the regulation of pod color formation in PPs. Overall, the results of this study first explored the mechanism underlying the purple color variation between PPs and GPs, and then preliminarily screened out some candidate genes responsible for the pod color formation in PPs.
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