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ORIGINALPAPEREthyleneandrootingofmungbeancuttings.Theroleofauxininducedethylenesynthesisandphase-dependenteffectsGeert-JanDeKlerkÆJanaHanecakovaReceived:1June2006/Accepted:23June2008/Publishedonline:26July2008TheAuthor(s)2008AbstractWehavere-examinedtheroleofethyleneduringrootingofmungbeancuttings.Cuttingsweretreatedfor5dayswithaloworahighconcentrationofNAA(naphthaleneaceticacid).Duringthis5daysperiod,wealsoappliedSTS(silverthiosulfate,aninhibitorofethyleneaction)orACC(1-aminocyclo-propane-l-carboxylicacid,adirectprecursorofethylene).AthighNAAconcentration,STSpro-motedandACCinhibitedrooting,respectively.AtlowNAAconcentration,theeffectswereopposite,STSbeinginhibitoryandACCpromotive.AVG(aminoethoxyvinylglycine,aninhibitorofethylenesynthesis)gavesimilarresultsasSTS.Together,thesedatasuggestsupraoptimalandsuboptimalethylenelevelsinthetissueathighandlowNAAconcentration,respectively.Wealsoexaminedwhethertheeffectofethylenevariedduringthesuccessivephasesoftherootingprocess.Thus,wegave24hpuls...