CmBES1 is a regulator of boundary formation in chrysanthemum ray florets

作     者：Peilei Cheng Yanan Liu Yiman Yang Hong Chen Hua Cheng Qian Hu Zixin Zhang Jiaojiao Gao Jiaxin Zhang Lian Ding Weimin Fang Sumei Chen Fadi Chen Jiafu Jiang Peilei Cheng;Yanan Liu;Yiman Yang;Hong Chen;Hua Cheng;Qian Hu;Zixin Zhang;Jiaojiao Gao;Jiaxin Zhang;Lian Ding;Weimin Fang;Sumei Chen;Fadi Chen;Jiafu Jiang

作者机构：State Key Laboratory of Crop Genetics and Germplasm EnhancementKey Laboratory of LandscapingMinistry of Agriculture and Rural AffairsCollege of HorticultureNanjing Agricultural University210095 NanjingChina 

出 版 物：《Horticulture Research》 (园艺研究（英文）)

年 卷 期：2020年第7卷第1期

页      面：1097-1108页

核心收录：

学科分类：0710[理学-生物学] 0831[工学-生物医学工程（可授工学、理学、医学学位）] 090706[农学-园林植物与观赏园艺] 0907[农学-林学] 1001[医学-基础医学(可授医学、理学学位)] 09[农学] 0901[农学-作物学] 0703[理学-化学] 0836[工学-生物工程] 0902[农学-园艺学] 0834[工学-风景园林学（可授工学、农学学位）] 

基　　金：supported by the National Natural Science Foundation of China(31930100) the National Natural Science Foundation of China(31701959) the Natural Science Fund of Jiangsu Province(BK20170717) the Fundamental Research Funds for the Central Universities(KJQN201815). 

主　　题：genes boundary expressing 

摘      要：Chrysanthemum(Chrysanthemum morifolium)is an ideal model species for studying petal morphogenesis because of the diversity in the flower form across varieties;however,the molecular mechanisms underlying petal development are poorly understood.Here,we show that the brassinosteroid transcription factor BRI1-EMS-SUPPRESSOR 1(CmBES1)in chrysanthemum(C.morifolium cv.Jinba)is important for organ boundary formation because it represses organ boundary identity genes.Chrysanthemum plants overexpressing CmBES1 displayed increased fusion of the outermost ray florets due to the loss of differentiation of the two dorsal petals,which developed simultaneously with the ventral petals.RNA-seq analysis of the overexpression lines revealed potential genes and pathways involved in petal development,such as CUP-SHAPED COTYLEDON(CUC2),CYCLOIDEA 4(CYC4),genes encoding MADS-box transcription factors and homeodomain-leucine zippers(HD-Zips)and auxin pathway-related genes.This study characterizes the role of CmBES1 in ray floret development by its modulation of flower development and boundary identity genes in chrysanthemum.