Abstract:
:Little is known about the diversity and roles of Gram-positive and pigmented bacteria in Antarctic environments, especially those associated with marine macroorganisms. This work is the first study about the diversity and antimicrobial activity of culturable pigmented Gram-positive bacteria associated with marine Antarctic macroalgae. A total of 31 pigmented Gram-positive strains were isolated from the surface of six species of macroalgae collected in the King George Island, South Shetland Islands. On the basis of 16S rRNA gene sequence similarities ≥99%, 18 phylotypes were defined, which were clustered into 11 genera of Actinobacteria (Agrococcus, Arthrobacter, Brachybacterium, Citricoccus, Kocuria, Labedella, Microbacterium, Micrococcus, Rhodococcus, Salinibacterium and Sanguibacter) and one genus of the Firmicutes (Staphylococcus). It was found that five isolates displayed antimicrobial activity against a set of macroalgae-associated bacteria. The active isolates were phylogenetically related to Agrococcus baldri, Brachybacterium rhamnosum, Citricoccus zhacaiensis and Kocuria palustris. The results indicate that a diverse community of pigmented Gram-positive bacteria is associated with Antartic macroalgae and suggest its potential as a promising source of antimicrobial and pigmented natural compounds.
journal_name
FEMS Microbiol Lettjournal_title
FEMS microbiology lettersauthors
Leiva S,Alvarado P,Huang Y,Wang J,Garrido Idoi
10.1093/femsle/fnv206subject
Has Abstractpub_date
2015-12-01 00:00:00pages
fnv206issue
24eissn
0378-1097issn
1574-6968pii
fnv206journal_volume
362pub_type
杂志文章abstract::Endophytic fungi from Paeonia lactiflora Pallas, which is mainly distributed in China, were characterized and screened to identify those capable of producing paeoniflorin. A total of 101 isolates obtained from the roots, stems and leaves of P. lactiflora were grouped into 16 fungal taxa based on morphological traits a...
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journal_title:FEMS microbiology letters
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journal_title:FEMS microbiology letters
pub_type: 信件
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journal_title:FEMS microbiology letters
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journal_title:FEMS microbiology letters
pub_type: 杂志文章
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更新日期:1993-02-01 00:00:00
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journal_title:FEMS microbiology letters
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journal_title:FEMS microbiology letters
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journal_title:FEMS microbiology letters
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journal_title:FEMS microbiology letters
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