A Single JAZ Repressor Controls the Jasmonate Pathway in Marchantia polymorpha  

作　　者：Isabel Monte Jose M. Franco-Zorrilla Gloria Garcia-Casado Angel M. Zamarreno Jose M. Garcia-Mina Ryuichi Nishihama Takayuki Kohchi Roberto Solano 

机构地区：[1]Department of Plant Molecular Genetics, Centro Nacional de Biotecnologia, Consejo Superior de Investigaciones Cientificas (CNB-CSIC), 28049 Madrid, Spain [2]Genomics Unit, Centro Nacional de Biotecnologia, Consejo Superior de Investigaciones Cientificas (CNB-CSIC), 28049 Madrid, Spain [3]Environmental Biology Department, University of Navarra, Navarre, Spain [4]Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan

出　　处：《Molecular Plant》2019年第2期185-198,共14页分子植物（英文版）

摘　　要：JAZ proteins are negative regulators of jasm onate responses,acting both as repressors of transcription factors and as co-receptors of JA-lle. The high redundancy of JAZ genes in angiosperms has hindered the characterization of a complete depletion of JAZ function. Moreover, the recent discovery that dn- OPDA is the jasmonate ligand in Marchantia polymorpha demonstrates that JA-lle is not the sole COI1/ JAZ ligand in land plants and highlights the importance of studying JAZ co-receptors in bryophytes? Here, we have exploited the low gene redundancy of the liverwort M. polymorpha to characterize the single MpJ4Z in this early diverging plant lineage. We clarify the phylogenetic history of the TIFY family, demonstrate that MpJAZ is the ortholog of AtJAZ with a conserved function, and characterize its repressor activity of dn-OPDA resp on ses. Our results show that, con sistent with previous findings in Arabidopsis, MpJAZ represses jasmonates biosynthesis, senescence, and plant defenses, and promotes cell growth and reproductive fitness, highlighting the power of studies in Marchantia.

关 键 词：JASMONATE REPRESSORS MARCHANTIA HORMONE signaling evolution gene redundancy 

分 类 号：Q[生物学]