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Novel insight into anthocyanin metabolism and molecular characterization of its key regulators in Camellia sasanqua

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Abstract

Flower color is a trait that affects the ornamental value of a plant. Camellia sasanqua is a horticultural plant with rich flower color, but little is known about the regulatory mechanism of color diversity in this plant. Here, the anthocyanin profile of 20 C. sasanqua cultivars revealed and quantified 11 anthocyanin derivatives (five delphinidin-based and six cyanidin-based anthocyanins) for the first time. Cyanidin-3-O-(6-O-(E)-p-coumaroyl)-glucoside was the main contributor to flower base color, and the accumulation of cyanidin and delphinidin derivatives differed in the petals. To further explore the molecular mechanism of color divergence, a transcriptome analysis was performed using C. sasanqua cultivars ‘YingYueYe’, ‘WanXia’, ‘XueYueHua’, and’XiaoMeiGui’. The co-expression network related to differences in delphinidin and cyanidin derivatives accumulation was identified. Eleven candidate genes encoding key enzymes (e.g., F3H, F3′H, and ANS) were involved in anthocyanin biosynthesis. Moreover, 27 transcription factors were screened as regulators of the two types of accumulating anthocyanins. The association was suggested by correlation analysis between the expression levels of the candidate genes and the different camellia cultivars. We concluded that cyanidin and delphinidin derivatives are the major drivers of color diversity in C. sasanqua. This finding provides valuable resources for the study of flower color in C. sasanqua and lays a foundation for genetic modification of anthocyanin biosynthesis.

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Data availability

The datasets generated and/or analyzed during this study are included in this article, its supplementary information files, or the [NCBI] repository with Accession number: PRJNA799897 [https://www.ncbi.nlm.nih.gov/sra/PRJNA799897].

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Acknowledgements

The authors are grateful to the editors and referees.

Funding

This work was supported by National Key R&D Program of China [Grant No. 2020YFD1000500] and Zhejiang Basic and Public Welfare Research Program [Grant No. LGN20C160006].

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Authors and Affiliations

Authors

Contributions

MF conducted the data analysis and wrote the manuscript; XL and HY conceived and designed the experiments; YZ, WL and MY performed the experiments; SW and JL contributed plant material. All authors have read and agreed to the published version of the manuscript.

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Correspondence to XinLei Li.

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The authors declare no conflicts of interest.

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Supplementary Information

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Supplementary file1 (PDF 2694 KB)

Supplementary Fig S1. The co-elution profile with the standard substance (Cy3G).

Supplementary file2 (PDF 1250 KB)

Supplementary Fig S2. The correlation analysis of the sequencing data.

Supplementary file3 (XLSX 13 KB)

Supplementary Table S1. The raw chroma value data.

Supplementary file4 (XLSX 20 KB)

Supplementary Table S2. The LC-MS anthocyanin data.

Supplementary file5 (XLSX 11 KB)

Supplementary Table S3. Summary of sequencing quality.

Supplementary file6 (XLSX 18 KB)

Supplementary Table S4. Identified genes related to the anthocyanin metabolic pathway.

Supplementary file7 (XLSX 266 KB)

Supplementary Table S5. The GO enrichment analysis of the co-expression modules.

Supplementary file8 (XLSX 40 KB)

Supplementary Table S6. The KEGG enrichment analysis of the co-expression modules.

Supplementary file9 (XLSX 15 KB)

Supplementary Table S7. The identified TFs in the co-expression modules.

Supplementary file10 (XLSX 11 KB)

Supplementary Table S8. The RT-qPCR primers.

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Fan, M., Li, X., Zhang, Y. et al. Novel insight into anthocyanin metabolism and molecular characterization of its key regulators in Camellia sasanqua. Plant Mol Biol 111, 249–262 (2023). https://doi.org/10.1007/s11103-022-01324-2

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  • DOI: https://doi.org/10.1007/s11103-022-01324-2

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