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Morphological and genetic diversity of Beaufort Sea diatoms with high contributions from the Chaetoceros neogracilis species complex ArchiMer
Balzano, Sergio; Percopo, Isabella; Siano, Raffaele; Gourvil, Priscillia; Chanoine, Melanie; Marie, Dominique; Vaulot, Daniel; Sarno, Diana.
Seventy-five diatoms strains isolated from the Beaufort Sea (Canadian Arctic) in the summer of 2009 were characterized by light and electron microscopy (SEM and TEM) as well as 18S and 28S rRNA gene sequencing. These strains group into 20 genotypes and 17 morphotypes and are affiliated with the genera Arcocellulus, Attheya, Chaetoceros, Cylindrotheca, Eucampia, Nitzschia, Porosira, Pseudo-nitzschia, Shionodiscus, Thalassiosira, Synedropsis. Most of the species have a distribution confined to the northern/polar area. Chaetoceros neogracilis and Chaetoceros gelidus were the most represented taxa. Strains of C. neogracilis were morphologically similar and shared identical 18S rRNA gene sequences, but belonged to four distinct genetic clades based on 28S rRNA,...
Tipo: Text Palavras-chave: Biogeography; ITS; ITS2 secondary structure; LSU; Morphology; Phylogeny; Polar diatoms; SSU.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00356/46718/46584.pdf
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