27874.高山離子芥低溫誘導(dǎo)cdna文庫(kù)的構(gòu)建及轉(zhuǎn)錄因子fzf全長(zhǎng)基因的克隆和功能預(yù)測(cè)_第1頁(yè)
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1、蘭州大學(xué)碩士學(xué)位論文高山離子芥低溫誘導(dǎo)cDNA文庫(kù)的構(gòu)建及轉(zhuǎn)錄因子FZF全長(zhǎng)基因的克隆和功能預(yù)測(cè)姓名:金鳴申請(qǐng)學(xué)位級(jí)別:碩士專(zhuān)業(yè):生物學(xué)植物學(xué)指導(dǎo)教師:安黎哲20100501蘭州大學(xué)碩士論文AbstractChori5porabungeana,amemberofmustardfamily,isofleofthetypicalsubnivalplantsthatcangrowwellinthefreezingtemperatureSOth

2、atitcanbestudiedasthesampleplantwhichiSstresstoleranceAftersubjectedtolOWtemperature(4“C)for24h,theprolineconcentrationandthesolublesugarconcentrationinChorisporabungeanacallusarebothincreasedsignificantlyincontrast,ther

3、elativeelectricalconductivity(REC)andthemaIondialdehyde(MDA)concentrationarenot,whichindicatedthatChorisporabungeanacanacclimatizethecoldenvironmentthroughregulateitsownmetabolismeDNAlibrarywereconstructedafterexposureCh

4、orisporabungeanacallusto4℃for24hwiththemethodofsuppressionsubtractivehybridization(SSH)andeDNAarrayThereare274positiveclonesamongl536monocloneinthecDNAlibraryand72geneswiththedifferentfunctionwerescreenedOfthese72geneswh

5、ichareup—regulatedordown—regulatedundercoldstress,25%(aboutl8)aretranscriptionfactor,l53%(about11)aremetabolism—relatedorproteinsynthesisanddegrationrelated,694%(about5)aresignalrelatedandphotosynthesisrelaed,417%(about3

6、)arestressrelatedand556%(about4)aredefenserelatedInaddition,therearestilll39%(about10)areunkownproteinsand694%(about5)arenomatchgenesTheseidentifiedcDNAsencodeproteinsthatmayplayaroleinincreasingcoldresistantthroughCazsi

7、gnalingpathway,ABAdependentsignalingpathwayandABAindependentsignalingpathway,whichcanmaintainthecellmembranesstabletokeepthecellwhole,increasethesolublesubstancetokeepthenormalosmoticpressureandenhancethephotosynthesisto

8、supplytheenergyFZFfull—Ien昏hfromChorisporabungeanaisacquiredwithrapidamplificationofcDNAends(RACE)ThesequenceofnucleotideandaminoacidofFZFgenewerehighlyhomologic(86%identifyand91%similarity)inChori5:porabungeanaandArabid

9、opsisthalianaFurtherbioinformaticsanalysisrevealedthat403aminoacidwereencodedbyl2l2bpnucleotidewiththemolecularweight(MW)457KDandtheisoelectricpoint(p1)582it’ShydrophilicwithtwotypicalC2H2zincfingerdomaininN—side,butther

10、e’SnotransmembranedomainandsignalpeptideItindicatedthatFZFfromChorisporabungeanaworksinthenuclearandregulatesthedownstreamgenestranscriptionasatranscriptionfactortoenhancethecoldresistanceofChorisporabungeanaKeyWord:Chor

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