GhIQD10 interacts with GhCaM7 to control cotton fiber elongation via calcium signaling  

作　　者：Fan Xu Li Wang Jun Xu Qian Chen Caixia Ma Li Huang Guiming Li Ming Luo 

机构地区：[1]Key Laboratory of Biotechnology and Crop Quality Improvement of the Ministry of Agriculture,Biotechnology Research Center,Southwest University,Chongqing 400715,China [2]Zhengzhou Research Base,State Key Laboratory of Cotton Biology,Zhengzhou University,Zhengzhou 450001,Henan,China [3]Academy of Agricultural Sciences of Southwest University,State Cultivation Base of Crop Stress Biology for Southern Mountainous Land of Southwest University,Chongqing 400715,China

出　　处：《The Crop Journal》2023年第2期447-456,共10页作物学报（英文版）

基　　金：funded by the National Natural Science Foundation of China(31571722 and 31971984).

摘　　要：IQ67-domain(IQD)proteins function in plant defense and in organ development.The mechanisms by which they influence cotton fiber development are unknown.In the present study,GhIQD10 was expressed mainly in the transition period of cotton fiber development,and GhIQD10-overexpression lines showed shorter fibers.GhIQD10 interacted with GhCaM7 and the interaction was inhibited by Ca^(2+).In in vitro ovule culture,Ca^(2+)rescued the shorter-fiber phenotype of GhIQD10-overexpression lines,which were insensitive to the Ca^(2+)channel inhibitor verapamil and the Ca^(2+)pool release channel blocker 2-aminoethoxydiphenyl borate.We conclude that GhIQD10 affects cotton fiber elongation via Ca^(2+)signaling by interacting with GhCaM7.Brassinosteroid(BR)biosynthesis and signaling genes were up-regulated in GhIQD10-overexpression lines.Fiber development in these lines was not affected by epibrassinolide or the BR biosynthesis inhibitor brassinozole,indicating that the influence of GhIQD10 on fiber elongation was not associated with BR.

关 键 词：Cotton Fiber elongation IQ67-domian protein CA^(2+) BRASSINOSTEROID 

分 类 号：S562[农业科学—作物学]