FaAKR23 Modulates Ascorbic Acid and Anthocyanin Accumulation in Strawberry (Fragaria x ananassa) Fruits

文献类型： 外文期刊

第一作者： Wei, Lingzhi

作者： Wei, Lingzhi;Liu, Huabo;Ni, Yang;Dong, Jing;Zhong, Chuanfei;Sun, Rui;Li, Shuangtao;Xiong, Rong;Wang, Guixia;Sun, Jian;Zhang, Yuntao;Chang, Linlin;Gao, Yongshun;Wei, Lingzhi;Liu, Huabo;Ni, Yang;Dong, Jing;Zhong, Chuanfei;Sun, Rui;Li, Shuangtao;Xiong, Rong;Wang, Guixia;Sun, Jian;Zhang, Yuntao;Chang, Linlin;Gao, Yongshun;Wei, Lingzhi;Liu, Huabo;Dong, Jing;Zhong, Chuanfei;Sun, Rui;Li, Shuangtao;Wang, Guixia;Sun, Jian;Zhang, Yuntao;Chang, Linlin;Gao, Yongshun;Ni, Yang;Xiong, Rong

作者机构：

关键词： strawberry; antioxidants; ascorbic acid; anthocyanin; AKR

期刊名称：ANTIOXIDANTS （ 影响因子：7.675； 五年影响因子：7.886 ）

ISSN：

年卷期： 2022 年 11 卷 9 期

页码：

收录情况： SCI

摘要： Strawberry (Fragaria x ananassa) fruits are rich in ascorbic acid (AsA) and anthocyanin, which are essential antioxidants for human health. However, the underlying regulatory mechanism of these antioxidant accumulation, especially AsA accumulation in strawberry fruits, remains largely unknown. In this study, we identified FaAKR23 was a regulator of AsA and anthocyanin accumulation. We transiently expressed FaAKR23 in strawberry fruits and conducted metabolic and molecular analyses to explore the role of FaAKR23 in AsA and anthocyanin accumulation. Transient silencing of FaAKR23 (FaAKR23-RNAi) in strawberry fruits significantly decreased the AsA and anthocyanin contents compared with control (empty vector-RNAi, EV-RNAi). Correspondingly, expression of some structural genes and regulatory factors involved in these two antioxidants' accumulation was dramatically repressed. In addition, transcriptome analysis of EV-RNAi and FaAKR23-RNAi fruits suggested that FaAKR23 was also involved in starch and sucrose metabolism as well as plant-pathogen interaction. Overall, these results not only provide the coordinated regulatory function of FaAKR23 on AsA and anthocyanin accumulation but also offer a promising candidate gene for strawberry breeding with high antioxidants.

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