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Trichodesmium, a Globally Significant Marine Cyanobacterium
Planktonic marine cyanobacteria of the genus Trichodesmium occur throughout the oligotrophic tropical and subtropical oceans. Their unusual adaptations, from the molecular to the macroscopic level,Expand
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Nitrogenase gene diversity and microbial community structure: a cross-system comparison.
Biological nitrogen fixation is an important source of fixed nitrogen for the biosphere. Microorganisms catalyse biological nitrogen fixation with the enzyme nitrogenase, which has been highlyExpand
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Unicellular cyanobacteria fix N2 in the subtropical North Pacific Ocean
Fixed nitrogen (N) often limits the growth of organisms in terrestrial and aquatic biomes, and N availability has been important in controlling the CO2 balance of modern and ancient oceans. TheExpand
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High rates of N2 fixation by unicellular diazotrophs in the oligotrophic Pacific Ocean
The availability of nitrogen is important in regulating biological productivity in marine environments. Deepwater nitrate has long been considered the major source of new nitrogen supporting primaryExpand
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Use of degenerate oligonucleotides for amplification of the nifH gene from the marine cyanobacterium Trichodesmium thiebautii.
Trichodesmium spp. are marine filamentous, nonheterocystous, nitrogen-fixing cyanobacteria which are an important component of marine ecosystems. This organism has never been maintained in axenicExpand
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Nitrogen Cycling in the Ocean: New Perspectives on Processes and Paradigms
  • J. Zehr, B. Ward
  • Biology, Medicine
  • Applied and Environmental Microbiology
  • 1 March 2002
The nitrogen (N) cycle is composed of multiple transformations of nitrogenous compounds, catalyzed primarily by microbes. The N cycle controls the availability of nitrogenous nutrients and biologicalExpand
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Vertical distributions of nitrogen-fixing phylotypes at Stn ALOHA in the oligotrophic North Pacific Ocean
In large areas of the world's oceans, biological dinitrogen (N 2 ) fixation supports a significant fraction of ecosystem productivity; to date, however, there is little information on the abundancesExpand
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Influence of the Amazon River plume on distributions of free-living and symbiotic cyanobacteria in the western tropical north Atlantic Ocean
The vertical and horizontal distributions of seven diazotrophic populations in the western tropical north Atlantic (WTNA) Ocean were examined using a nifH DNA quantitative polymerase chain reactionExpand
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Nitrogen fixation and transfer in open ocean diatom–cyanobacterial symbioses
Many diatoms that inhabit low-nutrient waters of the open ocean live in close association with cyanobacteria. Some of these associations are believed to be mutualistic, where N2-fixing cyanobacterialExpand
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GROWTH AND NITROGEN FIXATION OF THE DIAZOTROPHIC FILAMENTOUS NONHETEROCYSTOUS CYANOBACTERIUM TRICHODESMIUM SP. IMS 101 IN DEFINED MEDIA: EVIDENCE FOR A CIRCADIAN RHYTHM 1
Trichodesmium sp. IMS 101, originally isolated from coastal western Atlantic waters by Prufert‐Bebout and colleagues and maintained in seawater‐based media, was successfully cultivated in twoExpand
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