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ID:40728433
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页数:13页
时间:2019-08-06
《The WRKY70 transcription factor of Arabidopsis》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、Planta(2007)226:125–137DOI10.1007/s00425-006-0474-yORIGINALARTICLETheWRKY70transcriptionfactorofArabidopsisinXuencesboththeplantsenescenceanddefensesignalingpathwaysBekirÜlker·M.ShahidMukhtar·ImreE.SomssichReceived:25September2006/Accepted:21December2006/Publishedonline:20February2007©Sprin
2、ger-Verlag2007AbstractRegulatoryproteinsplaycriticalrolesinanddefensesignalingpathways.Thesestudiescouldcontrollingthekineticsofvariouscellularprocessesformthebasisforfurtherunravelingofthesetwocom-duringtheentirelifespanofanorganism.Leafsenes-plexinterlinkedregulatorynetworks.cence,aninteg
3、ralpartoftheplantdevelopmentalprogram,isWne-tunedbyacomplextranscriptionalKeywordsAtwrky70mutants·Dark-inducedregulatorynetworkensuringasuccessfulswitchtothesenescence·Salicylicacid·Signalingcrosstalkterminallifephase.Toexpandourunderstandingonhowtranscriptionalcontrolcoordinatesleafsenes-A
4、bbreviationscence,wecharacterizedAtWRKY70,ageneencodingaETEthyleneWRKYtranscriptionfactorthatfunctionsasanegativeJAJasmonicacidregulatorofdevelopmentalsenescence.TogaininsightSASalicylicacidintotheinterplayofsenescenceandplantdefensesig-nalingpathways,weemployedacollectionofmutants,allowing
5、ustospeciWcallydeWnetheroleofIntroductionAtWRKY70inthesalicylicacid-mediatedsignalingcascadesandtofurtherdissectthecross-talkofsignalLeafsenescence,constitutingtheterminalstageofleaftransductionpathwaysduringtheonsetofsenescencedevelopment,isatypeofprogrammedcelldeathinArabidopsisthaliana.O
6、urresultsprovidestrong(PCD)andismanifestedbyalossofchlorophyllthatevidencethatAtWRKY70inXuencesplantsenescenceoccursduringchloroplastdisassemblytogetherwithothercataboliceventssuchasprotein,lipidandnucleicacidsdegradation(Quirinoetal.2000;Gepstein2004).B.Ülker·M.ShahidMukhtar·I.E.Somssich(&
7、)Leafsenescenceisregulatedbybothintrinsicandenvi-MaxPlanckInstituteforPlantBreedingResearch,ronmentalsignals,withanumberofphytohormonesAbteilungMolekularePhytopathologie,andgrowthregulatorssuchascytokinins,abscisicacid,Carl-von-Linné-Weg10,50829Cologne,G
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