4.7 Article

R2R3-MYB transcription factor family in tea plant (Camellia sinensis): Genome-wide characterization, phylogeny, chromosome location, structure and expression patterns

期刊

GENOMICS
卷 113, 期 3, 页码 1565-1578

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ygeno.2021.03.033

关键词

Camellia sinensis; Anthocyanin biosynthesis; Abiotic stress; Expression pattern

资金

  1. Earmarked Fund for China Agriculture Research System [CARS-19]
  2. Fujian Agriculture and Forestry University Science and Technology Innovation Special Fund [CXZX2017181]
  3. Special Fund for Science and Technology Innovation of Fujian Zhang Tianfu Tea Development Foundation [FJZTF01]

向作者/读者索取更多资源

This study identified 122 CsR2R3-MYB genes in tea plants and analyzed their structure and function. The results showed that these genes have diverse expression patterns and may play roles in regulating multiple biological processes in tea plants.
MYB transcription factors play essential roles in many biological processes and environmental stimuli. However, the functions of the MYB transcription factor family in tea plants have not been elucidated. Here, a total of 122 CsR2R3-MYB genes were identified from the chromosome level genome of tea plant (Camellia sinensis). The CsR2R3-MYB genes were phylogenetically classified into 25 groups. Results from the structure analysis of the gene, conserved motifs, and chromosomal distribution supported the relative conservation of the R2R3-MYB genes family in the tea plant. Synteny analysis indicated that 122, 34, and 112 CsR2R3-MYB genes were orthologous to Arabidopsis thaliana, Oryza sativa and C. sinensis var. 'huangdan' (HD), respectively. Tissue-specific expression showed that all CsR2R3-MYB genes had different expression patterns in the tea plant tissues, indicating that these genes may perform diverse functions. The expression patterns of representative R2R3-MYB genes and the regulatory network of the main anthocyanin components were analyzed, which suggested that CsMYB17 may played a key role in the regulation of cya-3-O-gal, del-3-O-gal, cya-3-O-glu and pel-3-O-glu. Results from the qRT-PCR validation of selected genes suggested that CsR2R3-MYB genes were induced in response to drought, cold, GA, and ABA treatments. Overall, this study provides comprehensive and systematic information for research on the function of R2R3-MYB genes in tea plants.

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