文献类型： 外文期刊
作者： Li, Xinlei 1 ; Lei, Wenlong 2 ; You, Xiaomei 1 ; Kong, Xiangrui 1 ; Chen, Zhihui 1 ; Shan, Ruiyang 1 ; Zhang, Yazhen 1 ; Yu, Youben 2 ; Wang, Pengjie 2 ; Chen, Changsong 1 ;
作者机构： 1.Fujian Acad Agr Sci, Tea Res Inst, Fuzhou 350013, Peoples R China
2.Northwest A&F Univ, Coll Hort, Yangling 712100, Peoples R China
3.Natl Ctr Tea Improvement, Fujian Branch, Fuzhou 350013, Peoples R China
关键词： Camellia sinensis; Chromatin accessibility; Methylation; Jasmine; Aroma
期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.5； 五年影响因子：8.7 ）
ISSN： 0141-8130
年卷期： 2024 年 281 卷
页码：
收录情况： SCI
摘要： 'Chungui' is a newly promoted tea cultivar in China, renowned for producing oolong tea with a distinctive jasmine-like aroma. However, the genetic basis of this unique aroma remains unclear. In this study, the 'Chungui' genome, one of the most complete and well-annotated tea genomes, was assembled using PacBio HiFi reads and Hi-C sequencing. Through comparative analysis with typical jasmine flower volatiles, eight core compounds responsible for this aroma were identified. Further research revealed that the jasmine-like aroma in 'Chungui' is regulated by a coordinated mechanism involving a significant increase in chromatin accessibility and the demethylation of CHH and CHG in the promoter regions of key aroma-related genes during oolong tea processing. The study proposes that the formation of this unique aroma is driven by the synergistic effect of enhanced chromatin accessibility and reduced methylation, which together lead to the robust upregulation of genes involved in the biosynthesis of these core aroma components. These results provide a molecular foundation for understanding the unique jasmine-like aroma of 'Chungui' tea and sets the stage for future studies to explore the roles of these regulatory mechanisms in aroma formation.
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