数字农科院2.0

Integrated metabolic phenotypes and gene expression profiles reveal enzymatic browning mechanism in postharvest chrysanthemum

文献类型： 外文期刊

作者： Dan Yang;Shanshan Liu;Yuyun Zhu;Weihong Feng;Sha Chen;Yongxin Zhang;Wei Wang;Mei Zhang;Chen Kang;Zhongqi Cai;Shouhui Wei;Jingjing Zhu

作者机构：

关键词： Browning product;Chrysanthemum morifolium;Enzymatic browning;Metabolomics;Molecular mechanism;Transcriptomics

期刊名称： Industrial Crops and Products

ISSN： 0926-6690

年卷期： 2024 年 211 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Chrysanthemum (Chrysanthemum morifolium Ramat) is a valuable crop mainly used for medicine, beverages and ornament. Enzymatic browning causes serious postharvest flower deterioration of chrysanthemum, but the mechanism remains unclear. To clarify the mechanism involved, the cellular ultrastructure, metabolites, browning products, and differentially expressed genes of chrysanthemum were studied systematically. During the browning process, cellular compartmentalization was severely disrupted and the contents of chlorogenic acid derivatives and flavonoid glycosides decreased significantly. A browning product with a dihydrobenzofuran skeleton was purified and identified for the first time from a simulated browning reaction of chlorogenic acid catalyzed by peroxidase. Moreover, six differentially expressed genes were for the first time identified to be involved in the regulation of oxidase by transcriptome and qPCR, and one of which (c76073_g1) was validated using in vitro enzyme activity determination. This research elucidates the inherent mechanism of enzymatic browning, provides a scientific explanation for the steam-treated processing of chrysanthemums and lays the foundation for the molecular breeding of anti-browning chrysanthemum varieties.

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