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2011-08

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cc-by (c) López Legentil, Susanna et al., 2011
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/43593

Cyanobacterial diversity and a new Acaryochloris-like symbiont from Bahamian sea-squirts

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Recurs relacionat

http://dx.doi.org/10.1371/journal.pone.0023938

Resum

Symbiotic interactions between ascidians (sea-squirts) and microbes are poorly understood. Here we characterized the cyanobacteria in the tissues of 8 distinct didemnid taxa from shallow-water marine habitats in the Bahamas Islands by sequencing a fragment of the cyanobacterial 16S rRNA gene and the entire 16S-23S rRNA internal transcribed spacer region (ITS) and by examining symbiont morphology with transmission electron (TEM) and confocal microscopy (CM). As described previously for other species, Trididemnum spp. mostly contained symbionts associated with the Prochloron-Synechocystis group. However, sequence analysis of the symbionts in Lissoclinum revealed two unique clades. The first contained a novel cyanobacterial clade, while the second clade was closely associated with Acaryochloris marina. CM revealed the presence of chlorophyll d (chl d) and phycobiliproteins (PBPs) within these symbiont cells, as is characteristic of Acaryochloris species. The presence of symbionts was also observed by TEM inside the tunic of both the adult and larvae of L. fragile, indicating vertical transmission to progeny. Based on molecular phylogenetic and microscopic analyses, Candidatus Acaryochloris bahamiensis nov. sp. is proposed for this symbiotic cyanobacterium. Our results support the hypothesis that photosymbiont communities in ascidians are structured by host phylogeny, but in some cases, also by sampling location.

Matèries

Invertebrats marins, Cianobacteris, Ecologia marina, Ascidiacis, Bahames

Matèries (anglès)

Marine invertebrates, Cyanobacteria, Marine ecology, Sea squirts, Bahamas

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Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
Publicacions de projectes de recerca finançats per la UE

Citació

LÓPEZ LEGENTIL, Susanna, et al. Cyanobacterial diversity and a new Acaryochloris-like symbiont from Bahamian sea-squirts. PLoS One. 2011. Vol. 6, num. 8, pags. e23938. ISSN 1932-6203. [consulted: 7 of August of 2026]. Available at: https://hdl.handle.net/2445/43593

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