SDF5 Encoding P450 Protein Is Required for Internode Elongation in Rice  

作　　者：Yang Yachun Li Juan Li Hao Xu Zuntao Qin Ruiying Wu Wenge Wei Pengcheng Ding Yong YANG Jianbo 

机构地区：[1]Agricultural College,Anhui Agricultural University,Hefei 230036,China [2]Rice Research Institute,Anhui Academy of Agricultural Sciences,Hefei 230031,China [3]School of Life Sciences,University of Science and Technology of China,Hefei 230026,China

出　　处：《Rice science》2021年第4期313-316,I0002-I0007,共10页水稻科学（英文版）

基　　金：supported by the Natural Science Foundation of Anhui Province in China(Grant No.1808085MC66);the Program of Rice Genetic Breeding Key Laboratory of Anhui Province(Grant No.SDKF-2020-02);University Synergy Innovation Program of Anhui Province(Grant No.GXXT-2019-033)in China.

摘　　要：Plant height is a critical trait for yield in rice(Oryza sativa),and gibberellic acid(GA)is involved in modulating rice height.Here,we identified the semi-dwarf 5(sdf5)mutant by screening a rice T-DNA insertion mutant library using genome-resequencing.sdf5 contains a T-DNA insertion that causes the ectopic expression of LOC_Os05g34325,which encodes a 14-α-demethylase cytochrome P450(CYP51)protein.Levels of the active GA species GA1 and GA4 were reduced in the sdf5 mutant,and the semi-dwarf phenotype of the sdf5 mutant was rescued by exogenous GA4.In addition to its semi-dwarf height,the sdf5 mutant exhibited compact plant architecture,dark green leaves and low 1000-grain weight.Together,these results suggest that SDF5 is involved in GA biosynthesis pathway and modulates rice height and plant development.

关 键 词：SATIVA DWARF ORYZA 

分 类 号：S511[农业科学—作物学]