Global biogeography of Prochlorococcus genome diversity in the surface ocean

The ISME Journal
Alyssa G KentAdam C Martiny

Abstract

Prochlorococcus, the smallest known photosynthetic bacterium, is abundant in the ocean's surface layer despite large variation in environmental conditions. There are several genetically divergent lineages within Prochlorococcus and superimposed on this phylogenetic diversity is extensive gene gain and loss. The environmental role in shaping the global ocean distribution of genome diversity in Prochlorococcus is largely unknown, particularly in a framework that considers the vertical and lateral mechanisms of evolution. Here we show that Prochlorococcus field populations from a global circumnavigation harbor extensive genome diversity across the surface ocean, but this diversity is not randomly distributed. We observed a significant correspondence between phylogenetic and gene content diversity, including regional differences in both phylogenetic composition and gene content that were related to environmental factors. Several gene families were strongly associated with specific regions and environmental factors, including the identification of a set of genes related to lower nutrient and temperature regions. Metagenomic assemblies of natural Prochlorococcus genomes reinforced this association by providing linkage of genes across...Continue Reading

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Jul 23, 2016·Frontiers in Microbiology·María Agustina Domínguez-MartínJosé M García-Fernández
Sep 22, 2016·Marine Genomics·Ângela M RibeiroRute R da Fonseca
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May 13, 2020·Proceedings. Biological Sciences·Marlène ChiarelloThierry Bouvier
Oct 16, 2019·The ISME Journal·Adrienne HoarfrostKatherine S Pollard
May 30, 2020·Microbial Ecology·Diogo TschoekeCristiane Thompson
Sep 14, 2020·Molecular Ecology·Hélène GardonGisèle Bronner
Oct 5, 2018·The ISME Journal·Alyssa G KentAdam C Martiny
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Jun 27, 2019·The ISME Journal·Chao YangYujun Cui
Jan 12, 2021·Trends in Microbiology·Maria Rosa Domingo-Sananes, James O McInerney

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