16S+rDNA克隆文库方法分析好氧颗粒污泥细菌组成
- Allen
-
0 次阅读
-
0 次下载
-
2020-04-29 12:52:55
文档简介:
第22卷第l0期2009年lO月环境科学研究ResearchofEnvironmentalSCiencesVo1.22,No.100ct..200916SrDNA克隆文库方法分析好氧颗粒污泥细菌组成李建婷,纪树兰卜,刘志培,秦振平,刘缨,杨媛媛1.北京工业大学环境与能源工程学院,北京1001242.中国科学院微生物研究所,北京100101摘要:采用构建16SrDNA克隆文库方法对好氧颗粒污泥的细菌种群多样性进行研究.随机测定了82个克隆子序列(700bp),Blast比对结果表明,好氧颗粒污泥中微生物群落具有高度多样性,可分为7个主要类群,其中,卢变形菌(p—Proteobacteria)类群和鞘脂杆菌(Sphingobacteria)类群在文库中所占比例最大,分别为34.16%和30.50%;其次是CandidatedivisionTM7类群、黄杆菌(Flavobacteria)类群和y变形菌(y—Proteobacteria)类群,分别为9.76%,7.32%和7.32%;放线菌(Actinobacteria)类群和口变形菌(Ct—Proteobacteria)类群所占比例相对较小,分别为4.88%和1.22%.序列分析结果表明,好氧颗粒污泥中不仅含有对好氧颗粒污泥形成和稳定运行具有重要作用的食酸菌属(Acidxn~rax)细菌、假单胞菌(Pseudomonas)等细菌,还含有对COD和氨氮具有很好去除能力的Micropruinaglycogenica,丛毛单胞菌科(Comamonadaceae)等细菌.关键词:好氧颗粒污泥;16SrDNA克隆文库;细菌组成中图分类号:X172文献标志码:A文章编号:1001—6929(2009)10—1218—06AnalysisofBacterialCompositionofAerobicGranularSludgewith16SrDNACloneLibraryLIJian.ting,JIShu—lan。,LIUZhi.pei,QINZhen.ping,LIUYing2,YANGYuan.yuan1.CollegeofEnvironmentandEnergyEngineering,BeringUniversityofTechnology,Beijing100124,China2.InstituteofMicrobiology,ChineseAcademyofSciences,Beijing100101,ChinaAbstract:ThebacterialdiversityofallaerobicgranularsludgeWaSstudiedbytheconstructionofa16SrDNAclonelibrary.82cloneswererandomlyselectedfromthelibrary.Thecorrespondingpartial16SrDNAgene(ca.700bp)wassequencedandblasted.Theresultsindicatedthatthebacterialcommunityintheaerobicgranularsludgewashighlydiverse,andcouldbedividedintosevenmajorgroups.Thelargestfractionswerefl-ProteobaeteriaandSphingobacteria,whichaccountedfor34.16%and30.50%ofthetotalclones,respectively.TheportionsofCandidatedivisionTM7,Flavobacteriaand7-Proteobacteriawere9.76%,7.32%,and7.32%,respectively.Therelativelylowerportionswere4.88%Actinobacteriaand1.22%a-Proteobacteria.Theresultofsequenceanalysisalsoshowsthattherearenotonlybacteriaimportantfortheformingandstableoperationofaerobicgranularsludge(forexample,Acidot~rax,Pseudomonas),butalsobacteriabeneficialtotheremovalofCODcandammonia—nitrogen(forexample,Micropruinaglycogenica,Comamonadaceae)intheaerobicgranularsludge.Keywords:aerob
评论
发表评论