Diversity of Diazotrophic Unicellular Cyanobacteria in the Tropical North Atlantic Ocean

• DOI: 10.1128/aem.68.11.5760-5764.2002
• Publication Date: 2009-04-22T04:04:55Z
• Authors: Luisa I. Falcón; Frank Cipriano; Andrei Y. Chistos...; Edward J. Carpenter
• Keywords: Genetic divergence

ABSTRACT We present data on the genetic diversity and phylogenetic affinities of N 2 -fixing unicellular cyanobacteria in plankton tropical North Atlantic Ocean. Our dinitrogenase gene ( nifH ) sequences grouped together with a group from subtropical Pacific; another Pacific was only distantly related. Most 16S ribosomal DNA our samples were closely allied symbiont diatom Climacodium frauenfeldianum . These findings suggest complex pattern evolutionary ecological divergence among within between ocean basins.