茉莉酸甲酯浸种对水稻幼苗白叶枯病抗性及抗氧化酶活性的影响.doc

茉莉酸甲酯浸种对水稻幼苗白叶枯病抗性及抗氧化酶活性的 影响 向妙莲１　付永琦１　何永明１　黄友明１,２　曾晓春１,２, (１江西农业大学作物生理生态与遗传育种教育部重点实验室,南昌３３００４５;２宜春学院生命科学与资源环境学院,江西宜春 ３３６０００;通讯联系人,EＧmail:xchzeng２０１３＠１６３．com) EffectsofSeedSoakingwithMethylJasmonateonResistancetoBacterialLeaf BlightandAntioxidantEnzymeActivitiesofRiceSeedlings XIANGMiaoＧlian１,FUYongＧqi１,HEYongＧming１,HUANGYouＧming１,２,ZENGXiaoＧchun１,２, (１KeyLaboratoryofCropPhysiology,EcologyandGeneticBreeding,MinistryofEducation,JiangxiAgriculturalUniversity, Nanchang３３００４５,China;２DepartmentofLifeScienceandEnvironmentalResources,YichunUniversity,Yichun３３６０００,China, Correspondingauthor,EＧmail:xchzeng２０１３＠１６３．com) XIANGMiaolian,FUYongqi,HEYongming,etal．Effectsofseedsoakingwithmethyljasmonateonresistanceto bacterialleafblightandantioxidantenzymeactivitiesofriceseedlings．ChinJRiceSci,２０１４,２８(４):４１９Ｇ４２６． Abstract:Thisexperimentwascarriedouttostudytheeffectsofseedsoakingwithexogenousmethyljasmonate(MeＧ JA)onresistancetobacterialleafblightandantioxidantenzymeactivitiesofriceseedlingswithWen２２９(susceptibleto ricebacterialleafblight)andJiazao３１２(resistant)asexperimentalmaterials．TheresultsshowedthatMeJAsoaking significantlydecreasedthediseaseindexesofbacterialleafblightinriceseedlings,especiallyfortheresistantcultivar． WithrisingMeJAsolutionconcentration,theactivitiesofsuperoxidedismutase,peroridase,catalaseandascorbateperＧ oxidaseinleavesofriceseedlingsincreasedfirstlyandthendecreased,whilethemalondialdehyde(MDA)content raisedatfirstanddroppedafterwards．Ataconcentrationof０．５mmol/L,MeJAsoakingcauseddamagetoriceseedＧ ings．TheresponsesofantioxidantenzymeactivitiesandlipidperoxidationcontenttoMeJAsoakingvariedwithvariety． TheaboveresultsindicatedthatMeJAsoakingcouldeffectivelyrelievethebacterialleafblightofriceseedlings．TheinＧ creaseoftheantioxidantenzymeactivitiesandthedecreaseoftheMDAcontentarerelatedtoitsresistantreactionsto bacterialleafblight． Keywords:Methyljasmonate;riceseedlings;bacterialleafblight;antioxidantenzyme;lipidperoxidation 向妙莲,付永琦,何永明,等．茉莉酸甲酯浸种对水稻幼苗白叶枯病抗性及抗氧化酶