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Position: Home > Articles > Differential metabolites and their transcriptional regulation in seven major tea cultivars (Camellia sinensis) in China Journal of Integrative Agriculture 2023,22 (11)

Differential metabolites and their transcriptional regulation in seven major tea cultivars (Camellia sinensis) in China

作者：

Gao, Ting;Hou, Bing-hao;Shao, Shu-xian;Xu, Meng-ting;Zheng, Yu-cheng;Jin, Shan;Wang, Peng-jie;Ye, Nai-xing

单位：

Fujian Agr & Forestry Univ, Key Lab Tea Sci Univ Fujian Prov, Coll Hort, Fuzhou 350002, Peoples R China;Northwest A&F Univ, Coll Hort, Shaanxi 712100, Peoples R China

关键词：

Camellia sinensis;transcriptomics;metabolomics;WGCNA

摘要：

Various genetic and biochemical characteristics exist in tea plant cultivars, and they largely determine production suitability and tea quality. Here, we performed transcriptomic and metabolomic analyses of young shoots of seven tea cultivars and identified major regulatory transcription factors (TFs) for the characteristic metabolites in different cultivars based on weighted gene co-expression network analysis (WGCNA). Phenotypically, we found that 'Tieguanyin' (TGY) and 'Fujian Shuixian' (FJSX), which are suitable for oolong tea, had higher catechin contents. The metabolites of 'Jinxuan' (JX) were more prominent, especially the contents of phenolic acids, flavonoids, terpenes, and tannins, which were higher than those of the other six cultivars. Moreover, 'Fudingdabai' (FDDB), which is suitable for white tea, was rich in amino acids, linolenic acid, and saccharides. At the molecular level, hydroxycinnamoyl CoA quinate hydroxycinnamoyl transferase (HCT) (CsTGY12G0001876, and CsTGY06G0003042) led to the accumulation of chlorogenic acid in TGY. The main reason for the higher l-ascorbic acid content in FJSX was the high expression levels of L-galactono-1,4lactone hydrogenase (GalLDH) (CsTGY13G0000389) and Myo-inositol oxygenase (MIOX) (CsTGY14G0001769, and CsTGY14G0001770), which were regulated by WRKY (CsTGY11G0001197). Furthermore, FDDB, 'Longjing 43' (LJ43), 'Shuchazao' (SCZ) and 'Baihaozao' (BHZ) had higher free fatty acid contents, among which MYB (CsTGY14G0002344) may be a hub gene for the regulation of palmitoleic acid accumulation. More importantly, we found that the shoots of TGY were green with purple, mainly due to the accumulation of anthocyanins and the downregulation of the MgThese results will provide a theoretical reference for tea cultivar breeding and suitability.

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Differential metabolites and their transcriptional regulation in seven major tea cultivars (Camellia sinensis) in China

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