Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 21, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/ijms21114167
Keywords
Camellia sinensis; leaf coloration; flavonoid biosynthesis; widely targeted metabolomic; transcriptomic; coexpression analysis
Funding
- Fujian Province 2011 Collaborative Innovation Center, Chinese Oolong Tea Industry Innovation Center special project [J2015-75]
- Fujian Agriculture and Forestry University Project for Technological Innovation of Tea Industry Chain and Service System Construction
- Fujian Agriculture and Forestry University Science and Technology Innovation Special Fund [CXZX2017181]
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Purple-leaf tea is a phenotype with unique color because of its high anthocyanin content. The special flavor of purple-leaf tea is highly different from that of green-leaf tea, and its main ingredient is also of economic value. To probe the genetic mechanism of the phenotypic characteristics of tea leaf color, we conducted widely targeted metabolic and transcriptomic profiling. The metabolites in the flavonoid biosynthetic pathway of purple- and green-leaf tea were compared, and results showed that phenolic compounds, including phenolic acids, flavonoids, and tannins, accumulated in purple-leaf tea. The high expression of genes related to flavonoid biosynthesis (e.g., PAL and LAR) exhibits the specific expression of biosynthesis and the accumulation of these metabolites. Our result also shows that two CsUFGTs were positively related to the accumulation of anthocyanin. Moreover, genes encoding transcription factors that regulate flavonoids were identified by coexpression analysis. These results may help to identify the metabolic factors that influence leaf color differentiation and provide reference for future research on leaf color biology and the genetic improvement of tea.
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