甜菜抗丛根病信号转导机制的研究--着重于SA、CA2信号分子的研究

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1、内蒙古农业大学博士学位论文甜菜抗丛根病信号转导机制的研究——着重于SA、Ca<'2+>信号分子的研究姓名：陈贵华申请学位级别：博士专业：植物学指导教师：张少英20090601量，增强代谢，提高甜菜对丛根病的抗性，Ca2+．CaM系统在甜菜抗丛根病信号转导过程中起重要作用。本课题其它信号分子的研究工作正在进行中。关键词：甜菜；丛根病；信号转导；SA；H202；Ca-CaMStudiesonSignalTransductionM￡chanismsoftheResistancetoRhizomaniawithEmphasisonS

2、ignalingofSalicylicAcidandC一十inSugarBee．tAbstractSugarbeet(Betavutgaris三．)is锄importantsugarcropintheworld,butitsyieldandqualityareattackedseverelybymanydiseases．Sugarbeetrhizomaniadiseaseisthebestseveriousinthesugarbeet．ItcausedbyBeetnecroticyellowveinvirusandtrans

3、mittedbythesoil-borneparasitePolymyxabeta．Forsolutingrhizomaniadisease，ThemechanismofresistancetoRhizomaniawasinvestigatedinsugarbeet．ThesignalfunctionofthesignaltransductionintroductionofSA、H202andCa2+assignalmoleculeandsignaltransductionprocesswereattractedmoreat

4、tentionalsostudied．Theresultsshowedasfollows：．1．EffectofRhizomaniaonantioxidantsystem(Superoxidedismutase．SOD；PeroxidasePOD)andHydrogenperoxide(H202)、hyp、ligninofsugarbeetcellwallwerestudied．111eresultshowedthatthecontentH202washigherthanthatofthenormalgrowthcondit

5、ion；UndertheinfectedofRhizomania,SODactivity、PODactivity、thecontentofligninandhypofresistantvarietieswerehigherthansusceptiblevarieties．TKsresultshowed：thereexistacloserelationshipbetweenresistancetoRhizomaniaandthecontentH202ofcellwallonshgarbeet．2．nlesalicylicaci

6、dplaysailimportantroleinplantsdiseaseresistance．EffectsofrhizomaniaOffthecontentofsalicylicacid，pathogenesis-relatedprotein，H202，lig血andCatalase(CAT)activity,Phenyllalanineammonialyase(PAL)activityofsugarbeetwerestudied．mresultshowedthatthecontentsalicylicacid，H202

7、，pathogenesis—relatedprotein,ligninwerehigherthanthatofthenormalgrowtheondition；Undertheinfectedofrhiaomania,Catalase(CAT)activity,Phenyllalanineammonialyase(PAL)activityofresistantvarietieswerehigherthansusceptiblevarieties．Catalase(CAT)activity,Phenyllalanineammo

8、nialyase(PAL)activity．Thisresultshowed：salicylicacidistheoneofsisaltransduction．3．Effectsof3inhibitorsofCa2+(EGTA，LaClsandW7)onthecontentoCalmomd