茶树单体和聚合态儿茶素生物合成的研究进展

Abstract

Abstract: Catechin compounds, mainly including monomeric catechins and polymericcatechins, are the main components of tea polyphenols in Camellia sinensis and the decisive components of the "taste" of green tea. The synthesis and accumulation of tea catechin compounds have remarkable tissue- and organ- specificity. The leaves mainly biosynthesize monomeric catechins, and roots mainly accumulate polymeric catechins. The downstream enzymes of flavonoid metabolism pathway, leucoanthocyanidin reductase (LAR) and anthocyanin reductase (ANR) are the key enzymes determining the types of catechins. This paper mainly reviewed the research progress on the biosynthesis, accumulation, and transcriptional regulation of catechins in Camellia sinensis, with emphasis on the latest research progress in the function and transcriptional regulation of LAR, ANR and leucoanthocyanidin dioxygenase (LODX). Our views on the unsolved problems in catechin synthetic pathway were also proposed.

Key words: catechins, proanthocyanidins, leucoanthocyanidin reductase, anthocyanin reductase, leucoanthocyanidin dioxygenase

CLC Number:

S571.1

LIU Yajun, WANG Peiqiang, JIANG Xiaolan, ZHUANG Juhua, GAO Liping, XIA Tao. Research Progress on the Biosynthesis of Monomeric and Polymeric Catechins in Camellia sinensis[J]. Journal of Tea Science, 2022, 42(1): 1-17.

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Research Progress on the Biosynthesis of Monomeric and Polymeric Catechins in Camellia sinensis

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