Genome-Wide Characterization of Gene Family in Identifies Potential Regulatory Components in Pigment Biosynthesis Pathways.

Int J Mol Sci

Jiangxi Provincial Key Laboratory of Oil-Tea Camellia Resource Cultivation and Utilization, Jiangxi Academy of Forestry, Nanchang 330032, China.

Published: May 2025


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Article Abstract

The gene family is essential for controlling a variety of plant physiological functions, yet the involvement of specific members in pigment biosynthesis and accumulation in remains unexplored, particularly in anthocyanins and carotenoids, which play crucial roles in the pigmentation of . This study systematically identified 87 genes across 15 chromosomes in through bioinformatic approaches. Further structural and phylogenetic analyses of these TFs enabled their classification into six different subgroups. family expansion was shown to be mostly driven by tandem duplication. W-box elements, which can be binding sites for WRKY transcription factors, were present in a number of biosynthetic genes in the pigment production pathway. Yeast one-hybrid assay confirmed that five WRKY transcription factors (CchWRKY15/24/33/47/76) directly bind to the promoter regions of two key biosynthetic genes, and . Intriguingly, among the five WRKYs tested, the expression levels of CchWRKY15, CchWRKY33, and CchWRKY47 showed the strongest positive associations with flavonoid accumulation ( < 0.05, Pearson correlation analysis).These findings provide novel insights into the evolutionary patterns, transcriptional regulation, and functional characteristics of CchWRKYs, while elucidating their possible regulatory mechanisms in the fruit coloration of .

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12111399PMC
http://dx.doi.org/10.3390/ijms26104622DOI Listing

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