抗黄瓜花叶病毒RNAi载体的构建及烟草的转化
发布时间:2021-06-05
发布时间:2021-06-05
AgriculturalScience&Technology,2010,11(5):69-72Copyright2010,InformationInstituteofHAAS.Allrightsreserved.
PlantProtection
ConstructionofRNAiVectorWhichResistCucumberMosaicVirusandTransformationofTobacco
ZHANGYu,ZHENGYinying,ZHAOFengyu,QIAOYahong,CUIBaiming,XIANGBenchun
KeyLaboratoryofAgricultrureBiotechnologyofShiheziUniversity/CollegeofLifeSciences,ShiheziUniversity,Shihezi832003
Abstract [Objective]AimedtoconstructRNAivectorresistanttocucumbermosaicvirusandtransferredthisvectorintotobacco.[Method]RTPCRmethodwasusedtoamplifycucumbermosaicvirusNS04andprocessRNA2genesequenoftomatoisolates.TheanalysisresultsofphylogenetictreedemonstratedthatthesequenceinRNA2encodedCMV2ahad98.0%and96.5%homologywithnucleotideandaminoacidof
,China.ThereplicasefragmentinCMVRAN2genewastakenastargetsequencetoconstructpBi35SCR2eukaryDQ412731isolateofZhejiang
oticexpressionvector,thentheexpressionvectorwasidentified.Throughagrobacteriummediatedmethod,theexpressionvectorwastransferredintotabaccoandPCRmethodwasusedtocheckthetransfer.ThePCRresultsdemonstratedthattheexperimenthadsuccessfullyconstructeukaryoticexpressionvectorofpBi35SCR2andtheexpressionvectorwassuccessfullytransferredintotabacco.[Conclusion]Theobtainedtransgenictobaccocouldbeusedaschallengetestmaterialinfollowingexperimentandprovidedfoundationforstudyingprocessingtomatoresistcucumbermosaicvirus.Keywords Cucumbermosaicvirus;Homology;RNAivector;Tobacco;Transformation
Cucumbermosaicvirus(CMV)isanimportantpathogentocauseyieldreductionandevennoharvestofavarietyofeconomiccrops,butthetraditionalantivirusbreeding,tissuedetoxificationandpesticidepreventionmethodscauseenvi
[1]
ronmentalpollution,andtimeconsuming.Inrecentyears,thediscoveredphenomenonofgenesilencingisacommonphenomenonexistedintheprocessofbiologicallife,whichisanimportantwayoftheregulationofgeneexpression.ThegenesilencingofGMspecificcanbetransmittedbygraftingfromsilentstocktononsilentscion,thenthephenomenonofthetransferringofthiskindofgenesilencingsignalfromonecelloratissuetoanothercellortissueisdefinedassystemic
[2-5]
RNAi(RNAinterference).RNAihassomeadvantageswhicharedeficientinthetraditionalgeneticresearchmethods,ithasprovidedanewwaytostudyplantgenefunctionandgeneexpressionregulation,andthefunctionaldeletantcanbecreatedthroughtheselectivelyinhabitationsoftheex
[6]
pressionofspecificgenes.Combinedwiththespecific,effi
,RNAitechnologyhasacientandsystematicRNAisequence
,ithasbeendemonstrateditsuniqueroleparticularlyspecialrole
inthepreventionandtreatmentofviruses,wormsandharmful
[7-8]
parasites,aswellasgraftingbreeding.
Atpresent,theresistanceresearchesonCMVarefocusedonreplicaseproteinencodedbyRNA1genomeorCPproteinencodedbyRNA3subgenomic.Inthisstudy,basedonthepreclonedCMVRNA2genomesequence,the2areplicaseproteinwhichwasencodedbyRNA2genomewasusedtodesignRNAiantiviralvector,theconstructedRNAivectorwastransformedtotobaccothroughAgrobacteriummediated
,andtheantiviralabilityoftransgenictobaccoplantsmethod
wasobtainedbychallengetesttodeterminewhethertheprocesscanbeappliedtotomatoproduction.
Received:May26,2010 Accepted:June29,2010SupportedbyInternationalScienceandTechnologyCooperationProgram(2008DFA30560);PreliminaryResearchSpecialFoundationof973Program(2008CB117018);ScientificResearchProjectforHighLevelofTalentsofShiheziUniversity(RCZX200732).
orrespondingauthor.Email:xbc@shzu.edu.cnC
MaterialsandMethods
Materials
piRDG12andpBi35SG12weresavedbyKeyLaboratoryofAgricultrureBiotechnologyofShiheziUniversity/CollegeofLifeSciences,ShiheziUniversity;EscherichiacoliTOP10competentcellwaspurchasedfromShanghaiBioengineeringCompany;planttotalRNAextractionkitwaspurchasedfromTiangengBiotechnologyCompany;AMVreversetran
,TNAligase,andPCRproductextractionkitscriptase4D
werepurchasedfromPromegaCorporation.RestrictionenzymeswerepurchasedfromShanghaiBioengineeringCompany.TomatocucumbermosaicvirusisolatesNS04wassavedbyKeyLaboratoryofAgricultrureBiotechnologyofShiheziUniversity/CollegeofLifeSciences,ShiheziUniversity.MethodsTotalRNAextractionoftobaccoplants TotalRNAwasextractedformNicotianaglutinosawhichhadsavedtomatoNS04isolates,andtheextractionmethodwasinaccordancewithRNAsimpleTotalRNAKitmanualoperationfromTiangengBiotechnologyCompany.Primersdesignandsynthesis BasedonthesequencesinGenbank,theVectorNTIwasusedfortheprimersdesignandsynthesis,andtheprimersusedinthisstudyweresynthesizedbyShanghaiBiologicalEngineeringCompany.
Table1 PrimerandsequenceforPCRamplificationPrimernamePrimersequenceCMV2SP1CMV2ASP2CMV2SP3CMV2ASP4CR2BgCR2KpCR2SB
GTTTATTTACAAGAGCGTACGGTTCAATCTCGAAGGCATCTCTGGAAGTATAACCTCCCAGTTCTCACC
GGATGGACAACCCGTTCACC
GGAGATCTGTTTGCTCACTTCATG BglIIGGGTACCGAATGACTCAGTCTT KpnIGGGAGCTCGGATCCCGTTCACCGTGAAAACGT
RNA2genomeamplificationandsequenceanalysisof
CMV TheextractedtotalRNAwasusedforthereversetran