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Deep sequencing reveals exceptional diversity and modes of transmission for bacterial sponge symbionts.


ABSTRACT: Marine sponges contain complex bacterial communities of considerable ecological and biotechnological importance, with many of these organisms postulated to be specific to sponge hosts. Testing this hypothesis in light of the recent discovery of the rare microbial biosphere, we investigated three Australian sponges by massively parallel 16S rRNA gene tag pyrosequencing. Here we show bacterial diversity that is unparalleled in an invertebrate host, with more than 250,000 sponge-derived sequence tags being assigned to 23 bacterial phyla and revealing up to 2996 operational taxonomic units (95% sequence similarity) per sponge species. Of the 33 previously described 'sponge-specific' clusters that were detected in this study, 48% were found exclusively in adults and larvae - implying vertical transmission of these groups. The remaining taxa, including 'Poribacteria', were also found at very low abundance among the 135,000 tags retrieved from surrounding seawater. Thus, members of the rare seawater biosphere may serve as seed organisms for widely occurring symbiont populations in sponges and their host association might have evolved much more recently than previously thought.

SUBMITTER: Webster NS 

PROVIDER: S-EPMC2936111 | biostudies-literature | 2010 Aug

REPOSITORIES: biostudies-literature

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Deep sequencing reveals exceptional diversity and modes of transmission for bacterial sponge symbionts.

Webster Nicole S NS   Taylor Michael W MW   Behnam Faris F   Lücker Sebastian S   Rattei Thomas T   Whalan Stephen S   Horn Matthias M   Wagner Michael M  

Environmental microbiology 20090929 8


Marine sponges contain complex bacterial communities of considerable ecological and biotechnological importance, with many of these organisms postulated to be specific to sponge hosts. Testing this hypothesis in light of the recent discovery of the rare microbial biosphere, we investigated three Australian sponges by massively parallel 16S rRNA gene tag pyrosequencing. Here we show bacterial diversity that is unparalleled in an invertebrate host, with more than 250,000 sponge-derived sequence ta  ...[more]

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