Integrated transcriptomic and phytochemical analyses provide insights into characteristic metabolites variation in leaves of 1-year-old grafted tea (Camellia sinensis)

Autor: Mengqian Lu, Xiaochun Wan, Biying Zhu, Wei-Wei Deng, Zhengzhu Zhang, Jieyun Han, Rangjian Wang
Rok vydání: 2019
Předmět:
Zdroj: Tree Genetics & Genomes. 15
ISSN: 1614-2950
1614-2942
DOI: 10.1007/s11295-019-1363-4
Popis: Tea is a natural nonalcoholic beverage consumed worldwide. And grafting technique has been widely used to improve tea quality and quantity. Camellia sinensis cv. Xianghongdian 1 is an excellent variety of Lu’an guapian tea in China, because of its clones, early sprouting, high yielding, superior quality, and strong stress resistance characters. In this study, we grafted shoots from Xianghongdian 1 onto the rootstocks of low-yielding indigenous tea plants cv. Qimenzhong to improve their varietal characteristics. In order to investigate the variations of metabolites and transcription patterns in the grafted tea plants, the leaves were collected from 1-year-old grafted tea plants, whereas the leaves from scions and rootstocks were served as controls. The metabolic profiles and the gene expression patterns in the target pathways were determined and correlated. The contents of caffeine and total catechins were both higher in the grafting leaf compared with those in scion leaf and rootstock leaf, while the total free amino acid content was lower. All these metabolic changes were correlated to the variations in the transcripts expression patterns. It indicated a feasibility of enhancing the agronomic and economic traits in the short-term grafting tea plants through asexual propagation. And the long-term effects should undergo further investigation.
Databáze: OpenAIRE
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