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1、Onlinesystem:http://www.jabiotech.org農(nóng)業(yè)生物技術(shù)學(xué)報JournalofAgriculturalBiotechnology2014,22(1):47~54DOI:10.3969/j.issn.1674-7968.2014.01.006洋蔥花青素合成相關(guān)基因(AcPAL1)的克隆和表達(dá)分析121*1梁毅劉小義張洪偉譚武平1北京市農(nóng)林科學(xué)院蔬菜研究中心,農(nóng)業(yè)部華北地區(qū)園藝作物生物學(xué)與種質(zhì)創(chuàng)制重點實驗室,北京京研益農(nóng)科技發(fā)展中心,北京100097;2中國質(zhì)量認(rèn)證中心,北京100070通訊作者,zhwwawzjcx@163.com摘要苯丙氨
2、酸解氨酶(PAL)作為植物苯丙烷類代謝途徑中的關(guān)鍵酶,在其生長發(fā)育、抗病抗逆等多種生命進(jìn)程中起重要作用,是花青素生物合成途徑中的第一個酶。為了研究洋蔥(AlliumcepaL.)PAL基因的生物學(xué)功能及其與花青素合成之間的關(guān)系,利用不同植物PAL基因設(shè)計簡并引物,通過RT-PCR和RACE技術(shù)克隆洋蔥PAL基因全長cDNA序列(GenBank登錄號:KF421110),并對該基因進(jìn)行序列分析和Real-timePCR表達(dá)分析。結(jié)果表明,該序列全長2363bp,編碼包含708個氨基酸殘基的蛋白質(zhì)多肽;Blast分析和系統(tǒng)進(jìn)化分析表明,該多肽與大蒜(Allium.sati
3、vum)、石蒜(Lycorisradiate)PAL蛋白相似性很高,因此被命名為AcPAL1。Real-timePCR表達(dá)分析結(jié)果表明,AcPAL1基因在白皮、黃皮和紅皮洋蔥中表達(dá)量依次增加;而隨著鱗莖的不斷膨大,其表達(dá)量卻不斷降低。本實驗初步證實了所克隆的洋蔥AcPAL1基因與花青素合成相關(guān)聯(lián),為研究洋蔥PAL基因同花青素合成積累之間的關(guān)系提供了依據(jù)。關(guān)鍵詞洋蔥,花青素,AcPAL1CloningandExpressionAnalysisofanAnthocyaninBio-synthesis-relatedGene(AcPAL1)inOnion(Alliumcep
4、aL.)121*1LIANGYiLIUXiao-YiZHANGHong-WeiTANWu-Ping1BeijingVegetableResearchCenter,BeijingAcademyofAgricultureandForestrySciences,KeyLaboratoryofBiologyandGeneticImprovementofHorticulturalCropsinNorthChina,MinistryofAgriculture,BeijingJingyanyinongSci-TechDevelopmentCenter,Beijing100097,C
5、hina;2ChinaQualityCertificationCenter,Beijing100070,ChinaCorrespondingauthor,zhwwawzjcx@163.comAbstractAsakeyenzymeoftheplantphenylpropanoidpathway,phenylalanineammonia-lyase(PAL),whichplaysanimportantroleinthelifeprocessessuchasgrowthanddevelopment,anddiseaseresistance,isthefirstenzyme
6、intheanthocyaninsynthesispathway.InordertostudythebiologicalfunctionforPALinonion(AlliumcepaL.)anditsrelationshipwithanthocyaninsynthesis,thefulllengthcDNAofPALgene(GenBankaccessionno.KF421110)inonionbulbwasclonedbyRT-PCRandRACEtechnologyusingdegenerateprimersdesignedaccordingtoPALgenes
7、indifferentplants.ThesequenceanalysisandexpressionanalysisusingReal-timePCRwereperformedeither.TheresultsshowedthattheclonedsequencedesignatedAcPAL1hadfulllengthof2363bp,whichencodedaproteinpolypeptideof708aminoacids.Blastandphylogeneticanalysisindicatedthatthepolypeptideshared