Apical meristem transcriptome analysis identifies a role for the blue light receptor gene GhFKF1 in cotton architecture development  

作　　者：Xiao Li Yuanlong Wu Zhenping Liu Hengling Wei Hantao Wang Shuxun Yu 

机构地区：[1]National Key Laboratory of Crop Genetic Improvement,Hubei Hongshan Laboratory,Huazhong Agricultural University,Wuhan 430070,Hubei,China [2]State Key Laboratory of Cotton Biology,Institute of Cotton Research of the Chinese Academy of Agricultural Sciences,Anyang 455000,Henan,China [3]State Key Laboratory of Subtropical Silviculture,Zhejiang A&F University,Lin’an 311300,Zhejiang,China [4]Xianghu Laboratory,Hangzhou 311200,Zhejiang,China

出　　处：《The Crop Journal》2024年第4期1126-1136,共11页作物学报（英文版）

基　　金：funded by the National Key Research and Development Program of China(2020YFD1001004);the China Agricultural Research System(CARS-15-06).

摘　　要：Cotton architecture is determined by the differentiation fate transition of axillary meristem(AM),and influences cotton yield and the efficiency of mechanized harvesting.We observed that the initiation of flowering primordium was earlier in early-maturing than that in late-maturing cultivars during the differentiation and development of AM.The RNA-Seq and expression level analyses showed that genes FLAVIN BINDING,KELCH REPEAT,F-BOX1(GhFKF1),and GIGANTEA(GhGI)were in response to circadian rhythms,and involved in the regulation of cotton flowering.The gene structure,predicted protein structure,and motif content analyses showed that in Arabidopsis,cotton,rapseed,and soybean,proteins GhFKF1 and GhGI were functionally conserved and share evolutionary origins.Compared to the wild type,in GhFKF1 mutants that were created by the CRISPR/Cas9 system,the initiation of branch primordium was inhibited.Conversely,the knocking out of GhGI increased the number of AM differentiating into flower primordium,and there were much more lateral branch differentiation and development.Besides,we investigated that proteins GhFKF1 and GhGI can interact with each other.These results suggest that GhFKF1 and GhGI are key regulators of cotton architecture development,and may collaborate to regulate the differentiation fate transition of AM,ultimately influencing plant architecture.We describe a strategy for using the CRISPR/Cas9 system to increase cotton adaptation and productivity by optimizing plant architecture.

关 键 词：COTTON Axillary meristem GhFKF1 GhGI Plant architecture 

分 类 号：S562[农业科学—作物学]