数字农科院2.0

Overexpression of ZlMYB1 and ZlMYB2 increases flavonoid contents and antioxidant capacity and enhances the inhibition of α-glucosidase and tyrosinase activity in rice seeds

文献类型： 外文期刊

作者： Wanhong Li;Yali Li;Bintao Zhang;Qing Ma;Hehe Hu;Anming Ding;Lianguang Shang;Zhaohui Zong;Weicai Zhao;Hao Chen;Hongbo Zhang;Zhongfeng Zhang;Ning Yan

作者机构：

关键词： （3-0-3）Anthocyanins;Antioxidant capacity;Flavonoids;MYB transcription factor;Rice

期刊名称： Food Chemistry

ISSN： 0308-8146

年卷期： 2024 年 460 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Anthocyanins are natural flavonoids with a high antioxidant power and many associated health benefits, but most rice produce little amounts of these compounds. In this study, 141 MYB transcription factors in 15 chromosomes, including the nucleus-localised ZlMYB1 (Zla03G003370) and ZlMYB2 (Zla15G015220), were discovered in Zizania latifolia. Overexpression of ZlMYB1 or ZlMYB2 in rice seeds induced black pericarps, and flavonoid content, antioxidant capacity, and α-glucosidase and tyrosinase inhibition effects significantly increased compared to those in the control seeds. ZlMYB1 and ZlMYB2 overexpression induced the upregulation of 764 and 279 genes, respectively, and the upregulation of 162 and 157 flavonoids, respectively, linked to a black pericarp phenotype. The expression of flavonoid 3′-hydroxylase and UDP-glycose flavonoid glycosyltransferase, as well as the activities of these enzymes, increased significantly in response to ZlMYB1 or ZlMYB2 overexpression. This study systematically confirmed that the overexpression of ZlMYB1 and ZlMYB2 promotes flavonoid biosynthesis (especially of anthocyanins) in rice.

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