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1、EuropeanJournalofPlantPathology108:4149,2002.?2002KluwerAcademicPublishers.PrintedintheNetherlands.Inductionofsystemicacquiredresistanceinpepperplantsbyacibenzolar-S-methylagainstbacterialspotdisease12133RobertoBuonaurio,LucianoScarponi,MeryFerrara,PaolaSidotiandAngeloBe
2、rtona1DipartimentodiArboricolturaeProtezionedellePiante-UniversitadegliStudidiPerugia-BorgoXXGiugno,`74,06121Perugia,Italy(Phone:+39755856461;Fax:+39755856482;E-mail:buonaurio@unipg.it);2CentrodiStudiosullaChimicaeBiochimicadeiFitofarmacidelCNRBorgoXXGiugno,72-06121Perug
3、ia,3Italy;SyngentaProtezionePianteS.p.A.,ViaS.So?a,21,20122Milano,ItalyAccepted3October2001Keywords:acibenzolar-S-methyl,Capsicumannuum,persistence,systemicacquiredresistance,translocation,Xanthomonascampestrispv.vesicatoriaAbstractTheabilityofacibenzolar-S-methyltoinduc
4、eresistanceinpepperplantsagainstXanthomonascampestrispv.vesicatoriawasinvestigatedinbothgrowthchamberandopen?eldconditions.Growthchamberexperimentsshowedthatacibenzolar-S-methyl(300μM)treatmentprotectspepperplantssystemicallyandlocallyagainstX.campestrispv.vesicatoria.Ev
5、idenceforthiswasareductioninthenumberanddiameterofbacterialspotsandbacterialgrowthinplanta.Systemicprotectionwasalsoexertedbytheacibenzolar-S-methylacidderivative,CGA210007,whichmaybeproducedbyhydrolysisintheplant.Theef?cacyofacibenzolar-S-methylwasalsofoundinopen?eldcon
6、ditions,wherebothleavesandfruitwereprotectedfromthedisease.Thehighestef?cacy(about67%)wasobtainedbysprayingtheplants67timesevery812dayswithamixtureofacibenzolar-S-methylandcopper?1hydroxide(2.5+40ghlactiveingredient).Persistenceandtranslocationdataobtainedfromthegrowthch
7、amberexperimentsrevealedapersistenceofacibenzolar-S-methyllasting?vedaysaftertreatmentwithrapidtranslocationandnegligiblelevelsofacidderivativeformation.Sincetheprotectionexertedbyacibenzolar-S-methylagainstbacterialspotdiseasewasobservedwhentheinducerwascompletelydegrad
8、ed,itwouldappeartobeduetoSARactivation.IntroductiongenesBs1,Bs2andBs3,couldtriggertheappearanceofnewbac
