Wound-Induced Shoot-to-Root Relocation of JA-Ile Precursors Coordinates Arabidopsis Growth

作     者：Adina Schulze Marlene Zimmer Stefan Mielke Hagen Stellmach Charles WMelnyk Bettina Hause Debora Gasperini 

作者机构：Department of Molecular Signal ProcessingLeibniz Institute of Plant BiochemistryWeinberg 306120 Halle(Saale)Germany Department of Cell and Metabolic BiologyLeibniz Institute of Plant Biochemistry06120 Halle(Saale)Germany Department of Plant Biology.Swedish University of Agricultural Sciences75651 UppsalaSweden 

出 版 物：《Molecular Plant》 (分子植物（英文版）)

年 卷 期：2019年第12卷第10期

页      面：1383-1394页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：supported by the Deutsche Forschungsgemeinschaft by a Wallenberg Academy Fellowship from the Knut and Alice Wallenberg Foundation 

主　　题：grafting jasmonate OPDA phloem phytohormone 

摘      要：Multicellular organisms rely on the movement of signaling molecules across cells,tissues,and organs to communicate among distal *** plants,localized leaf damage activates jasmonic acid(JA)-dependent transcriptional reprogramming in both harmed and unharmed *** it has been indicated that JA species can translocate from damaged into distal sites,the identity of the mobile compound(s),the tissues through which they translocate,and the effect of their relocation remain ***,we found that following shoot wounding,the relocation of endogenous jasmonates through the phloem is essential to initiate JA signaling and stunt growth in unharmed roots of Arabidopsis *** employing grafting experiments and hormone profiling,we uncovered that the hormone precursor cis-12-oxo-phytodienoic acid(OPDA)and its derivatives,but not the bioactive JA-Ile conjugate,translocate from wounded shoots into undamaged *** root relocation,the mobile precursors cooperatively regulated JA responses through their conversion into JA-Ile and JA signaling ***,our findings demonstrate the existence of long-distance translocation of endogenous OPDA and its derivatives,which serve as mobile molecules to coordinate shoot-to-root responses,and highlight the importance of a controlled redistribution of hormone precursors among organs during plant stress acclimation.