Construction of a Yeast Hybrid Library and Identification of Proteins Regulating CaABI3/VP1-1 Expression in Capsicum annuum var.conoides  

作　　者：Huiru Deng Huan Tian Liuyan Yang Siyang Ou Hui Wang Guangdong Geng Suqin Zhang 

机构地区：[1]College of Agriculture,Guizhou University,Guiyang,550025,China

出　　处：《Phyton-International Journal of Experimental Botany》2024年第12期3273-3291,共19页国际实验植物学杂志（英文）

基　　金：funded by the National Natural Science Foundation of China(grant no.32260760);the Science and Technology Program of Guizhou Province(grant no.20201Z002);the Platform Construction Project of Engineering Research Center for Protected Vegetable Crops in Higher Learning Institutions of Guizhou Province(Qianjiaoji[2022]No.040).

摘　　要：Hot pepper(Capsicum annuum var.conoides)is a significant vegetable that is widely cultivated around the world.Currently,global climate change has caused frequent severe weather events,and waterlogging stress harms the pepper industry by affecting the planting period,growth conditions,and disease susceptibility.The gene CaABI3/VP1-1 could improve pepper waterlogging tolerance.In order to explore the upstream regulatory mechanism of CaABI3/VP1-1,a high-quality standardized yeast hybrid library was successfully constructed for yeast one-,two-,and threehybrid screening using pepper‘ZHC2’as the experimental material,with a library recombinant efficiency of up to 100%.The length of inserted fragments varied from 650 to 5000 bp,the library titer was 5.18×10^(6)colony-forming units(CFU)·mL-1,and the library capacity was 1.04×10^(7)CFU of cDNA inserts.The recombinant bait plasmid was used to successfully identify 78 different proteins through the yeast one-hybrid system,including one transcription factor within the ethylene-responsive factor family and the other within the growth-regulating factor family.The interaction happened between LOC124895848 and CaABI3/VP1-1 promoter by point-to-point yeast one-hybrid experiment.The expression level of the 12 selected protein-coding genes was then evaluated by quantitative real-time polymerase chain reaction.Results indicated the protein coding genes showed different responses to waterlogging stress and that the activity of the CaABI3/VP1-1 promoter could be inhibited or activated by up-regulating or down-regulating gene expression,respectively.The identification of these proteins interacting with the promoter provides a new perspective for understanding the gene regulatory network of hot pepper operating under waterlogging stress and provides theoretical support for further analysis of the complex regulatory relationship between transcription factors and promoters.

关 键 词：Capsicum annuum var.conoides CaABI3/VP1-1 PROMOTER yeast one-hybrid interacting protein waterlogging stress 

分 类 号：S641.3[农业科学—蔬菜学]