山茶
类黄酮
生物合成
生物化学
生物
类黄酮生物合成
新陈代谢
次生代谢
代谢途径
花青素
酶
植物
化学
基因
转录组
基因表达
抗氧化剂
作者
Jieren Liao,Qiang Shen,Ruiyang Li,Yu Cao,Yue Li,Zhongwei Zou,Taiyu Ren,Fang Li,Wanping Fang,Xujun Zhu
标识
DOI:10.1016/j.plaphy.2021.06.042
摘要
γ-Aminobutyric acid (GABA), a signal molecule, is regarded as the intersection node of carbon and nitrogen metabolism, and its contributions to flavonoid metabolism in tea plant growth and development remain unclear. The correlation between the GABA shunt and flavonoid metabolism in tea plants is worth to explore. Secondary metabolites and their correlations with the taste of tea soup made from tea plants (Camellia sinensis) during different seasons were investigated. Related secondary metabolites and transcript profiles of genes encoding enzymes in the GABA shunt, flavonoid pathway and polyamine biosynthesis were measured throughout the tea plant growth seasons and after exogenous GABA applications. In addition, the abundance of differentially expressed proteins was quantified after treatments with or without exogenous GABA. The tea leaves showed the highest metabolite concentrations in spring season. CsGAD, CsGABAT, CsSPMS, CsODC, CsF3H and CsCHS were found to be important genes in the GABA and anthocyanin biosynthesis pathways. GABA and anthocyanin concentrations showed a positive correlation, to some extent, CsF3H and CsCHS played important roles in the GABA and anthocyanin biosynthesis.
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