数字农科院2.0

Metabolite and Gene Expression Analysis Underlying Temporal and Spatial Accumulation of Pentacyclic Triterpenoids in Jujube

文献类型： 外文期刊

作者： Cuiping Wen;Zhong Zhang;Qianqian Shi;Rongrong Yue;Xingang Li

作者机构：

关键词： gene expression;MeJA;metabolic pathway;pentacyclic triterpenoid;Ziziphus jujuba Mill

期刊名称： Genes

ISSN： 2073-4425

年卷期： 2022 年 13 卷 5 期

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摘要： Jujube (Ziziphus jujuba Mill.) has attracted increasing attention because of its fruits’ high nutritional and medicinal value, which produce pentacyclic triterpenoids with valuable pharmaco-logical activities beneficial to human health. However, the dynamic accumulation and metabolism pathway of triterpenoids remain unknown in jujube. Here, we performed metabolite assays of triterpenoids and expression analysis of genes involved in the corresponding metabolic processes on cultivated jujube (Z. jujuba cv. Junzao) and one type of wild jujube (Z. jujuba var. spinosa cv. Qingjiansuanzao). Our results showed that the triterpenoids accumulate predominantly in young leaves, annual stems, buds, and white-mature and beginning red stage fruit. Besides, the total triterpenoid content, ceanothic acid, oleanonic acid, and 3-ketoursolic acid were higher in ‘Qingjiansuanzao’ than in ‘Junzao’. Moreover, we found 23 genes involved in terpenoids metabolism were expressed in all organs, and the ZjSQS1, ZjCYP450/1, ZjCYP450/3, ZjOSC1, ZjFPS, and ZjAACT2 gene expression patterns were consistent with metabolites accumulation during fruit de-velopment. In addition, 100 μM MeJA induced ZjSQS1, ZjFPS, and ZjHMGR3 expression in leaves and enhanced triterpenoids accumulation. These findings will help understand the unique metabolism of terpenoids and will benefit further utilization and breeding of jujube as both edible fruit and functional food.

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