Overexpression of IbPAL1 promotes chlorogenic acid biosynthesis in sweetpotato

文献类型： 外文期刊

第一作者： Yu, Yang

作者： Yu, Yang;Ma, Peiyong;Jia, Zhaodong;Guo, Xiaoding;Xie, Yizhi;Bian, Xiaofeng;Wang, Yingjie;Yu, Yue

作者机构：

关键词： Chlorogenic acid; Phenylalanine ammonia-lyase (PAL); Secondary metabolism; Sweetpotato

期刊名称：CROP JOURNAL （ 影响因子：4.407； 五年影响因子：5.687 ）

ISSN： 2095-5421

年卷期： 2021 年 9 卷 1 期

页码：

收录情况： SCI

摘要： Sweetpotato [Ipomoea batatas (L.) Lam.], a food crop with both nutritional and medicinal uses, plays essential roles in food security and health-promoting. Chlorogenic acid (CGA), a polyphenol displaying several bioactivities, is distributed in all edible parts of sweetpotato. However, little is known about the specific metabolism of CGA in sweetpotato. In this study, IbPAL1, which encodes an endoplasmic reticulum-localized phenylalanine ammonia lyase (PAL), was isolated and characterized in sweetpotato. CGA accumulation was positively associated with the expression pattern of IbPAL1 in a tissue-specific manner, as further demonstrated by overexpression of IbPAL1. Overexpression of IbPAL1 promoted CGA accumulation and biosynthetic pathway genes expression in leaves, stimulated secondary xylem cell expansion in stems, and inhibited storage root formation. Our results support a potential role for IbPAL1 in sweetpotato CGA biosynthesis and establish a theoretical foundation for detailed mechanism research and nutrient improvement in sweetpotato breeding programs. (C) 2020 Crop Science Society of China and Institute of Crop Science, CAAS. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd.

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