Comprehensive metabolic analyses provide new insights into primary and secondary metabolites in different tissues of Jianghua Kucha tea (Camellia sinensis var. assamica cv. Jianghua)
文献类型: 外文期刊
作者: Wu, Wenliang 1 ; Shi, Jiang 1 ; Jin, Jiqiang 1 ; Liu, Zhen 2 ; Yuan, Yong 3 ; Chen, Zhida 4 ; Zhang, Shuguang 2 ; Dai, Weidong 1 ; Lin, Zhi 1 ;
作者机构: 1.Chinese Acad Agr Sci, Minist Agr & Rural Affairs, Key Lab Biol Genet & Breeding Special Econ Anim &, Key Lab Tea Biol & Resources Utilizat,Minist Agr,T, Hangzhou, Zhejiang, Peoples R China
2.Hunan Acad Agr Sci, Tea Res Inst, Changsha, Hunan, Peoples R China
3.Hunan Tea Grp Co Ltd, Changsha, Hunan, Peoples R China
4.Chenzhou Guyanxiang Tea Co Ltd, Chenzhou, Hunan, Peoples R China
关键词: Jianghua Kucha; leaf position; metabolomics; primary metabolites; secondary metabolites
期刊名称:FRONTIERS IN NUTRITION ( 影响因子:5.0; 五年影响因子:5.7 )
ISSN: 2296-861X
年卷期: 2023 年 10 卷
页码:
收录情况: SCI
摘要: BackgroundJianghua Kucha (JHKC) is a special tea germplasm with enriched specialized secondary metabolites, including theacrine, non-epimeric flavanols and methylated flavanols. Moreover, primary metabolites provide precursors and energy for the production of secondary metabolites. However, the accumulation patterns of primary and secondary metabolites in different tissues of JHKC are unclear. MethodsThe changes of primary and secondary metabolites and related metabolic pathways (primary and secondary metabolism) in different JHKC tissues (the bud, 1st-4th leaves, and new stem) were investigated via metabolomics analysis with ultra-high-performance liquid chromatography quadrupole time-of-flight mass spectrometry (UHPLC-QTOF/MS). ResultsSignificant differences were observed in 68 primary and 51 secondary metabolites mainly related with the pathways of starch and sucrose, amino acids, caffeine, and flavanols metabolism and TCA cycle. The bud exhibited higher levels of glucose-6-phosphate, citric acid, most amino acids, theobromine, catechin-gallate, epicatechin-gallate, procyanidins, and theasinensins; the 1st leaf showed higher levels of caffeine and epigallocatechin-3-gallate; and the 4th leaf contained higher levels of most monosaccharides, theacrine, and epigallocatechin-3-O-(3"-O-methyl)-gallate. In addition, primary metabolites and important secondary metabolites had certain correlations. ConclusionThis study provides comprehensive insight into primary and secondary metabolites in JHKC and offers guidelines for efficiently utilizing specialized metabolites of JHKC in the future.
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