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Integrated transcriptome and metabolome analysis provides insights into anthocyanin biosynthesis in Cichorium intybus L.

文献类型： 外文期刊

作者： Zhu, Mingzhao 1 ; Zhao, Ran 2 ; Wu, Hanying 3 ; Zhang, Baohai 1 ; Zhang, Bin 1 ; Han, Xiangyang 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Vegetable Res Ctr, Natl Engn Res Ctr Vegetables,Key Lab Biol & Genet, State Key Lab Vegetable Biobreeding,Beijing Key La, Beijing 100097, Peoples R China

2.Chinese Acad Sci, Inst Bot, State Key Lab Plant Divers & Specialty Crops, Beijing, Peoples R China

3.Chinese Acad Sci, State Key Lab Systemat & Evolutionary Bot, Inst Bot, Beijing 100093, Peoples R China

4.China Natl Bot Garden, Beijing, Peoples R China

关键词： Cichorium intybus L.; Anthocyanin; Transcriptomics; Metabolome

期刊名称：BMC PLANT BIOLOGY （ 影响因子：4.8； 五年影响因子：5.4 ）

ISSN： 1471-2229

年卷期： 2025 年 25 卷 1 期

页码：

收录情况： SCI

摘要： BackgroundChicory is a unique and nutritious vegetable crop. However, the molecular mechanisms underlying anthocyanin biosynthesis in chicory remain poorly understood. We combined transcriptomics and metabolomics analyses to explore the molecular basis of anthocyanin biosynthesis in red-budded (Z1) and yellow-budded (Z7) chicory.ResultsIntegrated transcriptomics and metabolomics analyses were performed to investigate the molecular basis of anthocyanin biosynthesis in chicory. A total of 26 key structural genes, including F3'H, DFR, CHS, and ANS, were identified and enriched in pathways such as flavonoid and anthocyanin biosynthesis. Additionally, 29 transcription factors were identified, including 11 MYB, five bHLH, and two WD40 transcription factors, with seven MYB genes upregulated and four genes downregulated, indicating their roles in regulating anthocyanin biosynthesis. Notably, the MYB transcription factor, CI35997, which is homologous to RLL2A in lettuce, was predicted to positively regulate anthocyanin biosynthesis. Other transcription factors, such as AP2/ERF, bZIP, NAC, and Trihelix, have also been implicated. Metabolomics analysis revealed that cyanidin derivatives were the main contributors to the red coloration of chicory buds, with cyanidin-3-O-(6-O-malonyl)-glucoside being the most abundant. Furthermore, a competitive relationship between lignin and anthocyanin biosynthesis was observed, wherein the downregulation of lignin-related genes enhanced anthocyanin accumulation.ConclusionsThis study identified key structural genes and transcription factors that offer molecular-level insights into anthocyanin biosynthesis in chicory. These findings provide valuable guidance for genetic improvement of chicory and other crops with high anthocyanin content.

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