Unique nucleocytoplasmic dsDNA and +ssRNA viruses are associated with the dinoflagellate endosymbionts of corals
Identifieur interne : 000456 ( Main/Exploration ); précédent : 000455; suivant : 000457Unique nucleocytoplasmic dsDNA and +ssRNA viruses are associated with the dinoflagellate endosymbionts of corals
Auteurs : Adrienne M S. Correa [États-Unis] ; Rory M. Welsh [États-Unis] ; Rebecca L. Vega Thurber [États-Unis]Source :
- The ISME Journal [ 1751-7362 ] ; 2012.
Abstract
The residence of dinoflagellate algae (genus:
Url:
DOI: 10.1038/ismej.2012.75
PubMed: 22791238
PubMed Central: 3526182
Affiliations:
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Le document en format XML
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Unique nucleocytoplasmic dsDNA and +ssRNA viruses are associated with the dinoflagellate endosymbionts of corals</title>
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, Corvallis, OR,<country>USA</country>
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<country xml:lang="fr">États-Unis</country>
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, North Miami, FL,<country>USA</country>
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<country xml:lang="fr">États-Unis</country>
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<author><name sortKey="Vega Thurber, Rebecca L" sort="Vega Thurber, Rebecca L" uniqKey="Vega Thurber R" first="Rebecca L" last="Vega Thurber">Rebecca L. Vega Thurber</name>
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, Corvallis, OR,<country>USA</country>
</nlm:aff>
<country xml:lang="fr">États-Unis</country>
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, North Miami, FL,<country>USA</country>
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<country xml:lang="fr">États-Unis</country>
<wicri:regionArea># see nlm:aff country strict</wicri:regionArea>
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<series><title level="j">The ISME Journal</title>
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<front><div type="abstract" xml:lang="en"><p>The residence of dinoflagellate algae (genus: <italic>Symbiodinium</italic>
) within scleractinian corals is critical to the construction and persistence of tropical reefs. In recent decades, however, acute and chronic environmental stressors have frequently destabilized this symbiosis, ultimately leading to coral mortality and reef decline. Viral infection has been suggested as a trigger of coral–<italic>Symbiodinium</italic>
dissociation; knowledge of the diversity and hosts of coral-associated viruses is critical to evaluating this hypothesis. Here, we present the first genomic evidence of viruses associated with <italic>Symbiodinium</italic>
, based on the presence of transcribed +ss (single-stranded) RNA and ds (double-stranded) DNA virus-like genes in complementary DNA viromes of the coral <italic>Montastraea cavernosa</italic>
and expressed sequence tag (EST) libraries generated from <italic>Symbiodinium</italic>
cultures. The <italic>M. cavernosa</italic>
viromes contained divergent viral sequences similar to the <italic>major capsid protein</italic>
of the dinoflagellate-infecting +ssRNA <italic>Heterocapsa circularisquama</italic>
virus, suggesting a highly novel dinornavirus could infect <italic>Symbiodinium</italic>
. Further, similarities to dsDNA viruses dominated (∼69%) eukaryotic viral similarities in the <italic>M. cavernosa</italic>
viromes. Transcripts highly similar to eukaryotic algae-infecting phycodnaviruses were identified in the viromes, and homologs to these sequences were found in two independently generated <italic>Symbiodinium</italic>
EST libraries. Phylogenetic reconstructions substantiate that these transcripts are undescribed and distinct members of the nucleocytoplasmic large DNA virus (NCLDVs) group. Based on a preponderance of evidence, we infer that the novel NCLDVs and RNA virus described here are associated with the algal endosymbionts of corals. If such viruses disrupt <italic>Symbiodinium</italic>
, they are likely to impact the flexibility and/or stability of coral–algal symbioses, and thus long-term reef health and resilience.</p>
</div>
</front>
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<affiliations><list><country><li>États-Unis</li>
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<tree><country name="États-Unis"><noRegion><name sortKey="Correa, Adrienne M S" sort="Correa, Adrienne M S" uniqKey="Correa A" first="Adrienne M S" last="Correa">Adrienne M S. Correa</name>
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<name sortKey="Correa, Adrienne M S" sort="Correa, Adrienne M S" uniqKey="Correa A" first="Adrienne M S" last="Correa">Adrienne M S. Correa</name>
<name sortKey="Vega Thurber, Rebecca L" sort="Vega Thurber, Rebecca L" uniqKey="Vega Thurber R" first="Rebecca L" last="Vega Thurber">Rebecca L. Vega Thurber</name>
<name sortKey="Vega Thurber, Rebecca L" sort="Vega Thurber, Rebecca L" uniqKey="Vega Thurber R" first="Rebecca L" last="Vega Thurber">Rebecca L. Vega Thurber</name>
<name sortKey="Welsh, Rory M" sort="Welsh, Rory M" uniqKey="Welsh R" first="Rory M" last="Welsh">Rory M. Welsh</name>
<name sortKey="Welsh, Rory M" sort="Welsh, Rory M" uniqKey="Welsh R" first="Rory M" last="Welsh">Rory M. Welsh</name>
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