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[1]项丽慧,陈林,余文权,等.茶树GH1基因家族鉴定及其在茶鲜叶萎凋过程的表达[J].应用与环境生物学报,2020,26(04):878-885.
　XIANG Lihui,CHEN Lin,YU Wenquan & ZHANG Yinggen.Identification of the GH1 gene family in Camellia sinensis and expression analysis during the withering process of fresh tea leaves[J].Chinese Journal of Applied & Environmental Biology,2020,26(04):878-885.
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茶树GH1基因家族鉴定及其在茶鲜叶萎凋过程的表达()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
26卷
期数:
2020年04期
页码:
878-885
栏目:
研究论文
出版日期:
2020-08-25

文章信息/Info

Title:
Identification of the GH1 gene family in Camellia sinensis and expression analysis during the withering process of fresh tea leaves
作者:
项丽慧; 陈林; 余文权; 张应根
1福建省农业科学院茶叶研究所 福州 350011 2福建省农业科学院 福州 350002
Author(s):
XIANG Lihui1;  CHEN Lin1?;  YU Wenquan2 & ZHANG Yinggen1
1Tea Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350011, China 2 Fujian Academy of Agricultural Sciences, Fuzhou 350002, China
关键词:
茶树; 糖苷水解酶第1家族; 萎凋; 表达分析
Keywords:
Camellia sinensis;  glycoside hydrolase family 1;  withering;  expression analysis
摘要:
糖苷水解酶第1家族基因（GH1）在茶叶香气形成中发挥着重要作用. 为了解茶树GH1家族成员的进化特性及其在茶鲜叶萎凋过程的表达规律，基于茶树基因组数据库，对GH1基因家族进行全基因组鉴定，并对其编码蛋白的理化性质、亚细胞定位、保守基序及其在不同组织和茶鲜叶萎凋过程的表达模式进行分析. 结果显示，茶树GH1基因家族共31个成员，分为5个亚家族，同一亚家族的GH1具有类似的保守基序，保守性较高. GH1基因编码142-871个氨基酸，GH1在细胞中分布很广，包括分泌通路、细胞核、胞浆等. GH1基因表达量从高到低依次为幼嫩茎段、幼根、幼果、成熟叶、嫩叶、顶芽、老叶和花. 在茶鲜叶萎凋过程中，大部分GH1基因在鲜叶和萎凋减重10%阶段优势表达，而CsGH1BG6、CsGH1BG7和CsGH1BG26在茶鲜叶萎凋减重20%至60%之间上调表达，这是GH1基因参与白茶加工品质调控的关键时期. 本研究表明上调表达的GH1基因对茶鲜叶的失水胁迫调控和萎凋过程香气的形成起到积极的作用，可作为进一步开展茶鲜叶萎凋过程品质形成研究的候选基因；结果可为茶叶加工品质调控奠定基础. （图5 表2 参30）
Abstract:
The glycoside hydrolase family 1 genes (GH1) play a vital role in the formation of tea aroma. This study aimed to understand the evolutionary characteristics of the GH1 family members and their expression during fresh tea leaf withering. The GH1 gene family members were identified from the tea genome database, and physicochemical properties, subcellular localization, and conserved motifs of their encoded proteins and the expression patterns in different tissues during the withering process were analyzed. Thirty-one GH1 gene family members were identified in 5 subgroups, and the subfamily genes had similar conservative motifs and were highly conserved. These GH1 genes encoded proteins containing 142-871 amino acids, and GH1 were widely distributed in secretory pathway, nucleus, cytoskeleton and so on. The GH1 expression levels from high to low were the immature stems, tender roots, young fruits, mature leaves, young leaves, apical buds, old leaves, and flowers. Most of the GH1 genes were expressed in the fresh leaves and when the leaf weight was reduced by 10 %, while CsGH1BG6, CsGH1BG7, and CsGH1BG26 were up-regulated at 20% to 60% weight loss, which is a key period for the GH1 genes to regulate white tea quality. Up-regulated GH1 genes play a positive role in the regulation of water-deficient stress and the formation of aroma during fresh tea leaf withering. Thus, they may be candidate genes for further research into the quality formation of the withering process. Identification of the GH1 gene family and expression analysis in different tissues and during the withering process laid the foundation for tea quality control.

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更新日期/Last Update: 2020-08-25