生防芽孢菌對辣椒疫病的控病及機理研究.pdf

1、西南農(nóng)業(yè)大學(xué)碩士學(xué)位論文生防芽孢菌對辣椒疫病的控病及機理研究姓名：嚴占勇申請學(xué)位級別：碩士專業(yè)：植物病理學(xué)指導(dǎo)教師：肖崇剛20050501西南農(nóng)業(yè)大學(xué)碩士學(xué)位論文英文摘要曼i——I—■———■■■■■審●■■■■_DiseaseControlandMechanismfortheSporeBacteriaagainstPepperPhytophthoraBlightSupervisor：ProfXiaoChunggang(Collegeo

2、fPlantProtection，SouthwestAgriculturalUniversity。Chongqing400716，China)AbstractPepperPhytophthorablightcausedbyPhytophthoracapsieiisanimportantfongaldiseaseonthecropworldwideCurrentlychemicalcontrolisthemajormeasureforco

3、ntrollingthediseaseHowevertheuseofpesticidesisrestrictedbecausethismayinduceproblemsaschemicalresiduesOUthecrop，fungicideresistanceandenvironmentpollutionInaddition，thediseasearisesandspreadsatcapsicumrootthegoodeffectiv

4、enessofusingpesticidescouldnotbeachievedafterappearanceofthesymptomInordertoadoptthedevelopmentsofgreenagriculture。biocontrolmaybeallalternativetoavoidtheseproblemsincapsicumdiseasecontr01Inthepresentstudyantagonisticspo

5、rebacteriaagainstPhytophthoracapMciwerescreenedfiomrhizospheresoilsofcapsicumtomatoandtobaccoandthebiocontrolefficiencyandmechanismsoftheantagonisticbacteriaagainstthepathogenWasinvestigated1Atotalnumberof459bacterialiso

6、lateswereobtainedfromrhizospheresoilsofcapsicum，tomatoandtobaccoFromthese17sporebacteriashowedgoodantagonisticeffectsagainstPhytophthoracopgicibydyeingsporeandpairingcultureonCAAIngreenhousediseasecontrolexperiments，thes

7、poreisolateBn130WasfoundmosteffectiveinPepperPhytophthorablightcontr01Sprayingwiththebacteriumcultures。thediseasecontroleffectsagainstPepperPhytophthorablightWas647％after1d2SporebacteriaBn130obviouslysuppressmyceliumgrow

8、thof只capsicibyantagonismtestonCAAplatesThedivaricatorofmyceliumismanifold，vesiclaroccurredanditsprotoplastaggregatedthroughmicropahotographyTheresultfromculturefiltrateshowedthatBn一130isolateWasefficientforinhibitingmyce