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题名: Phylogenetic diversity of Gram-positive bacteria cultured from Antarctic deep-sea sponges
作者: Xin, Yanjuan1, 2;  Kanagasabhapathy, Manmadhan1;  Janussen, Dorte5, 6;  Xue, Song1;  Zhang, Wei1, 3, 4
关键词: Gram-positive bacteria ;  PKS ;  Antarctic porifera ;  Siliceous sponges ;  16S rRNA
刊名: POLAR BIOLOGY
发表日期: 2011-10-01
DOI: 10.1007/s00300-011-1009-y
卷: 34, 期:10, 页:1501-1512
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine
类目[WOS]: Biodiversity Conservation ;  Ecology
研究领域[WOS]: Biodiversity & Conservation ;  Environmental Sciences & Ecology
英文摘要: Gram-positive bacteria, specifically actinobacteria and members of the order Bacillales, are well-known producers of important secondary metabolites. Little is known about the diversity of Gram-positive bacteria associated with Antarctic deep-sea sponges. In this study, cultivation-based approaches were applied to investigate the Gram-positive bacteria associated with the Antarctic sponges Rossella nuda, Rossella racovitzae (Porifera: Hexactinellida), and Myxilla mollis, Homaxinella balfourensis, Radiella antarctica (Porifera: Demospongiae). In total, 46 Gram-positive strains were cultured. Phylogenetic analysis revealed that 24 strains were affiliated with the Actinobacteria, including six genera Streptomyces, Nocardiopsis, Pseudonocardia, Dietzia, Brachybacterium, and Brevibacterium. The other 22 strains were affiliated with the Firmicutes, and among them two (V17-1 and V179-1) only shared 92-95% 16S rRNA gene sequence identity with the nearest type strain. To our knowledge, this is the first report on the isolation of strains belonging to genera Dietzia and Brevibacterium from Antarctic sponges. All of the 46 strains were PCR screened for genes encoding polyketide synthases (PKS), and a selection of 36 isolates were used in subsequent bioassay analyses. Eighty-eight percentage of the isolates that possess a PKS gene were active against at least one test organism. The study confirms the existence of diverse bacteria in Antarctic sponges and their potential for producing active compounds.
关键词[WOS]: BARRIER-REEF SPONGE ;  ABYSSAL WEDDELL SEA ;  SOIL BACTERIA ;  PSEUDOCERATINA-CLAVATA ;  SELECTIVE ISOLATION ;  MARINE-SEDIMENTS ;  GENE-SEQUENCES ;  SOUTHERN-OCEAN ;  ACTINOBACTERIA ;  CULTIVATION
语种: 英语
WOS记录号: WOS:000297202300008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142428
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Marine Bioprod Engn Grp, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Flinders Univ S Australia, Sch Med, Flinders Ctr Marine Bioproc & Bioprod, Bedford Pk, SA 5042, Australia
4.Flinders Univ S Australia, Sch Med, Dept Med Biotechnol, Bedford Pk, SA 5042, Australia
5.Senckenberg Res Inst, Sect Marine Invertebrates 1, D-60325 Frankfurt, Germany
6.Natl Museum, D-60325 Frankfurt, Germany

Recommended Citation:
Xin, Yanjuan,Kanagasabhapathy, Manmadhan,Janussen, Dorte,et al. Phylogenetic diversity of Gram-positive bacteria cultured from Antarctic deep-sea sponges[J]. POLAR BIOLOGY,2011,34(10):1501-1512.
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