Unraveling the regulatory network of flower coloration in soybean:Insights into roles of GmMYBA3 and GmMYBR1  

作　　者：Ruifang Gao Yueqing Li Yanan Wang Xiaotong Shan Siqi Yang Ye Zhang Saiyu Ma Chunbao Zhang Jianchun Qin Li Wang Xiang Gao 

机构地区：[1]College of Plant Science,Jilin University,Changchun 130062,Jilin,China [2]Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics&Cytology,Northeast Normal University,Changchun 130024,Jilin,China [3]Soybean Research Institute,National Engineering Research Center for Soybean,Jilin Academy of Agricultural Sciences,Changchun 130033,Jilin,China

出　　处：《The Crop Journal》2024年第2期443-455,共13页作物学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(32201781,32100211);the Department of Science and Technology of Jilin Province(20220508112RC,20210101005JC);the Fundamental Research Fund for the Central Universities(2412023YQ005);China Agriculture Research System(CARS04)。

摘　　要：Anthocyanins play crucial roles in pollen protection and pollinator attraction in flowering plants.However,the mechanisms underlying flower color determination and whether floral anthocyanin regulators participate in other processes remain largely unresolved in soybeans(Glycine max).In this study,we investigated the genetic components and mechanisms governing anthocyanin biosynthesis in soybean flowers.Molecular and genetic studies have characterized two antagonistic regulators,the positive activator GmMYBA3 and the negative repressor GmMYBR1,that modulate the gene expression of anthocyanin biosynthesis in soybean flowers.Further findings revealed a regulatory interplay between GmMYBA3 and GmMYBR1 bridged by GmTT8a,highlighting the complexity of anthocyanin regulation in different soybean organs.Exploration of additional soybean cultivars demonstrated the universality of GmMYBA3 and GmMYBR1 in regulating floral anthocyanin biosynthesis-related genes,with GmF3’5’H identified as a crucial determinant of white flower color.This study provides a molecular mechanism underlying soybean flower color determination,paving the way for the molecular modification of soybean flowers to probably enhance their resistance to abiotic stresses and attractiveness to pollinators.

关 键 词：ANTHOCYANIN Flower color determination MBW complex MYB repressor Pleiotropic regulator 

分 类 号：S565.1[农业科学—作物学]