Diversity of Diazotrophic Unicellular Cyanobacteria in the Tropical North Atlantic Ocean
Open Access
- 1 November 2002
- journal article
- Published by American Society for Microbiology in Applied and Environmental Microbiology
- Vol. 68 (11) , 5760-5764
- https://doi.org/10.1128/aem.68.11.5760-5764.2002
Abstract
We present data on the genetic diversity and phylogenetic affinities of N 2 -fixing unicellular cyanobacteria in the plankton of the tropical North Atlantic Ocean. Our dinitrogenase gene ( nifH ) sequences grouped together with a group of cyanobacteria from the subtropical North Pacific; another subtropical North Pacific group was only distantly related. Most of the 16S ribosomal DNA sequences from our tropical North Atlantic samples were closely allied with sequences from a symbiont of the diatom Climacodium frauenfeldianum . These findings suggest a complex pattern of evolutionary and ecological divergence among unicellular cyanobacteria within and between ocean basins.Keywords
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