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《进境棉籽中棉花枯萎病菌的检疫鉴定和监控策略-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、上海农业学报2014,30(3):20—25ActaAgriculturaeShanghai文章编号:1000.3924(2014)03—020.06进境棉籽中棉花枯萎病菌的检疫鉴定和监控策略孙娟,陈舜胜,乔艳艳,于子翔,于翠,杨翠云。(上海海洋大学,上海201306;江西省棉花研究所,九江332105;上海出入境检验检疫局,上海200135)摘要:对从澳大利亚进境的多批棉籽进行了病原菌分离,纯化培养后得到3株疑似棉花枯萎病菌的菌株FOV.093、FOV.130和FOV.245。形态学观察表明:菌株FOV一093、FOV
2、一130和FOV.245均产生典型的棉花枯萎病菌大型分生孢子和小型分生孢子,前者呈镰状或椭圆形弯曲,后者呈假头状着生,多数为单孢,卵圆形;用通用引物ITS4/ITS5和特异引物FOV-F/R扩增,分别获得518bp和354bp的DNA片段,测序后通过BLAST比对表明,其与GenBank中Fusariumoxysporumf.sp.vasinfectum序列同源性为100%;致病性测定表明:3个菌株均可侵染棉花并致其萎蔫死亡。根据上述试验结果,将分离获得的菌株FOV.093、FOV.130和FOV.245鉴定为棉花枯萎病
3、菌Fusariumoxysporumf.sp.vasinfectum。加强进境棉籽的检疫和病害监控,是防止该真菌扩散和传播的有效方法。关键词:进境棉籽;棉花枯萎病菌;分离;鉴定;监控策略中图分类号:$435.621文献标识码:AIdentificationandmonitoringstrategyofFusariumoxysporumf.sp.vasinfectumfromimportedcottonseedsSUNJuan,CHENShun-sheng,QIAOYan—yan,YUZi—xiang。,YUCui。,YA
4、NGCui.yun。(CollegeofFoodScienceandTechnology,SnghaiOceanUniversity,Shanghai201306,China;CottonResearchInstituteofJiangxiProvince,Jiujiang332105,China;。ShanghaiEntry—ExitInspectionandQuarantineBureau,Shanghai200135,China)Abstract:F0V‘093,FOV-130andFOV一245wereisola
5、tedfromimportedcottonseedsofAustraliabyusingtraditionalPDAisolationmethod.TheseisolatesproducedtypicalmacroconidiaandmicroconidiaofFusariumoxysporumf.sp.vasinfectum.Macroconidiawerefalciform,oval;microconidiagatheredtoheadshape,singlecell,spawn.ThegeneralprimerIT
6、S4/ITS5andthespecificprimerFOV-F/RyieldedPCRproductsofapproximately518bpand354bp,respectively.ComparedwiththeidentityofrDNAsequenceofFusariumoxysporumf.sp.vasinfectumfromNCBIGanBankdatabasesbyBLASTmethod,theresultsshowedthatitshomologywasupto100%.Pathogenicitytes
7、tsshowedthatcottonseedlingswereinfected,wiltedtodeathbvFoV.093,FOV.130andFOV一245.Basedonm0rpho1Ogicalcharacteristics,molecularandpathogenicitytestresults,FOV一093,FOV一130andFOV-245wereidentifiedasFusariumOXysporumf.sp.vasinfectum(Atk.)Snyder&Hansen.Itwasaneffectiv
8、ewaytopreventthisfungusfromproliferatingandspreadingbystrengtheningcottonseedspestmonitoring,inspectionandquarantine.Keywords:Importedcottonseeds;Fusariumoxysp
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