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1、中国水稻科学(ChinJRiceSci),２０１４,２８(２):１３２－１４０http://www．ricesci．cn１３２DOI:１０．３９６９/ji．ssn．１００１Ｇ７２１６．２０１４．０２．００４水稻新种质YSBR１抗纹枯病机制的初步研究左示敏∗张玉梅薛芗朱亚军张亚芳陈宗祥陈夕军潘学彪∗(扬州大学江苏省作物遗传生理重点实验室/教育部植物功能基因组学重点实验室,江苏扬州２２５００９;∗通讯联系人,EＧmail:smzuo＠yzu．edu．cn;xbpan＠yzu．edu．cn)PreliminaryStudyonResistanceMechanismoftheNewRiceLin
2、eYSBR１toSheathBlightZUOShiＧmin∗,ZHANGYuＧmei,XUEXiang,ZHUYaＧjun,ZHANGYaＧfang,CHENZongＧxiang,CHENXiＧjun,PANXueＧbiao∗(KeyLaboratoryofCropGeneticsandPhysiologyofJiangsuProvince,CollegeofAgriculture,YangzhouUniversity/KeyLaboratoryofPlantFunctionalGenomicsoftheMinistryofEducation,Yangzhou２２５００９,China;
3、∗Correspondingauthor:smzuo＠yzue．duc．n;xbpan＠yzue．duc．n)ZUOShimin,ZHANGYumei,XUEXiang,etal．PreliminarystudyonresistancemechanismofthenewricelineYSBR１tosheathblight．ChinJRiceSci,２０１４,２８(２):１３２Ｇ１４０．Abstract:ThepreliminarymechanismofthenewricelineYSBR１withhighresistancetosheathblightdisease(SB)wasinv
4、estigatedthroughanalyzingthecontentofwaxandsilicon,thearrangementofsiliconcell,theactivityofthewellＧknowndefenseenzymes,andtheexpressionpatternofsomepathogenesisＧrelated(PR)genesinresponsetoSBfungusinfection．Thewaxcontentsofleavesandleafsheathswerenotsignificantlydifferentamongvarietieswithvariou
5、sresistancelevelstoSBdiseaseincludingYSBR１．Thearrangementofsiliconcellsintheupperandlowersurfacesofleafbladeswassimilaramongvarieties,andnosiliconcellwasfoundintheinnersurfacesofleafsheaths．InresponsetoSBfungusinfection,thecontentsofsiliconinthelowersurfacesofleafbladesandtheinnersurfacesofleafsh
6、eathsinYSBR１weresignificantlyinduced,aswellasininnersurfacesofleafsheathsofJasmine８５withmoderateresistancetoSB．However,itwasnotfoundinalltissuestestedinsusceptibleLemont．InYSBR１,theactivitiesofphenylalanineammonialyase(PAL)andpolyphenoloxidase(PPO)wereinducedfasterandsignificantlyhigherbySBfungus
7、thanthoseinothervarieties．TheexpressionlevelofOsPR４inYSBR１wasupregulatedrapidlyandobviouslyhigherthanthoseinJasmine８５andLemont１２hpostinoculation．TheOsPR１０genewasfoundconstitutivelyexpressedinYSBR１andLemont,butinducedex
