Making Use of Plant uORFs to Control Transgene Translation in Response to Pathogen Attack  

作　　者：Gan Ai Jin Liu Xiaowei Fu Tianli Li Hai Zhu Ying Zhai Chuyan Xia Weiye Pan Jialu Li Maofeng Jing Danyu Shen Ai Xia Daolong Dou 

机构地区：[1]College of Plant Protection,Academy for Advanced Interdisciplinary Studies,Nanjing Agricultural University,Nanjing 210095,China [2]Department of Plant Pathology,Washington State University,Pullman,WA 99164,USA

出　　处：《BioDesign Research》2022年第1期381-394,共14页生物设计研究（英文）

基　　金：the National Natural Science Foundation of China(31625023,31721004,and 32072507);the Fundamental Research Funds for the Central Universities(KYT202001).

摘　　要：Reducing crop loss to diseases is urgently needed to meet increasing food production challenges caused by the expanding world population and the negative impact of climate change on crop productivity.Disease-resistant crops can be created by expressing endogenous or exogenous genes of interest through transgenic technology.Nevertheless,enhanced resistance by overexpressing resistance-produced genes often results in adverse developmental affects.Upstream open reading frames(uORFs)are translational control elements located in the 5′untranslated region(UTR)of eukaryotic mRNAs and may repress the translation of downstream genes.To investigate the function of three uORFs from the 5′-UTR of ACCELERATED CELL 11(uORFsACD11),we develop a fluorescent reporter system and find uORFsACD11 function in repressing downstream gene translation.Individual or simultaneous mutations of the three uORFsACD11 lead to repression of downstream translation efficiency at different levels.Importantly,uORFsACD11-mediated translational inhibition is impaired upon recognition of pathogen attack of plant leaves.When coupled with the PATHOGENESIS-RELATED GENE 1(PR1)promoter,the uORFsACD11 cassettes can upregulate accumulation of Arabidopsis thaliana LECTIN RECEPTOR KINASE-VI.2(AtLecRKVI.2)during pathogen attack and enhance plant resistance to Phytophthora capsici.These findings indicate that the uORFsACD11 cassettes can be a useful toolkit that enables a high level of protein expression during pathogen attack,while for ensuring lower levels of protein expression at normal conditions.

关 键 词：EXPRESSING CROPS IMPAIRED 

分 类 号：Q78[生物学—分子生物学]