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Diversity and bioactivity of actinomycetes from Signy Is-land terrestrial soils,maritime Antarctic

查看全文 作　　者：Shing Yi [1]Pan;Geok Yuan Annie [1,2]Tan;Peter [2,3]Convey;David [2,3,4,5]A.Pearce;Irene [1,2]K.P.Tan 高影响力作者 机构地区：[1]Institute of Biological Sciences,Faculty of Science,University of Malaya;[2]National Antarctic Research Centre,B303,IPS Building,University of Malaya;[3]British Antarctic Survey,Natural Environment Research Council,High Cross,Madingley Road;[4]Faculty of Health and Life Sciences,University of Northumbria,Ellison Building,Newcastle Upon Tyne NE1 8ST;[5]University Centre in Svalbard,P.O.Box 156高影响力机构 出　　处：《Advances in Polar Science》索引2013年第24卷第4期,共5页高影响力期刊 基　　金：supported by grants from the University of Malaya(Grant no.PS334/2007B);the Malaysian Ministry of Higher Education(Grant no.FP007-2009) 摘　　要：The Antarctic represents a largely untapped source for isolation of new microorganisms with potential to produce bioactive natural products.Actinomycetes are of special interest among such microorganisms as they are known to produce a large number of natural products,many of which have clinical,pharmaceutical or agricultural applications.We isolated,characterized and classified actinomycetes from soil samples collected from different locations on Signy Island,South Orkney Islands,in the maritime Antarctic.A total of 95 putative actinomycete strains were isolated from eight soil samples using eight types of selective isolation media.The strains were dereplicated into 16 groups based on morphology and Amplified Ribosomal DNA Restriction Analysis(ARDRA)patterns.Analysis of 16S rRNA gene sequences of representatives from each group showed that streptomycetes were the dominant actinomycetes isolated from these soils;however,there were also several strains belonging to diverse and rare genera in the class Actinobacteria,including Demetria,Glaciibacter,Kocuria,Marmoricola,Nakamurella and Tsukamurella.In addition,screening for antibacterial activity and non-ribosomal peptide synthetase genes showed that many of the actinomycete strains have the potential to produce antibacterial compounds. 关 键 词：放线菌分类 土壤样品 生物活性 南极 多样性 核糖体DNA 基因序列分析 微生物生产
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