Trichodesmium, a Globally Significant Marine Cyanobacterium

@article{Capone1997TrichodesmiumAG,
  title={Trichodesmium, a Globally Significant Marine Cyanobacterium},
  author={Douglas G Capone and Jonathan P. Zehr and Hans W. Paerl and Birgitta Bergman and Edward J. Carpenter},
  journal={Science},
  year={1997},
  volume={276},
  pages={1221-1229}
}
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, contribute to their ecological success and biogeochemical importance. Trichodesmium fixes nitrogen gas (N2) under fully aerobic conditions while photosynthetically evolving oxygen. Its temporal pattern of N2 fixation results from an endogenous daily cycle that confines N2 fixation to daylight hours… Expand
Transatlantic Abundance of the N2-Fixing Colonial Cyanobacterium Trichodesmium
TLDR
Results of a transatlantic survey in which a noninvasive underwater digital microscope (the video plankton recorder), was towed across the North Atlantic at 6 meters per second while undulating between the surface and 130 meters found Colony abundance had a basin-scale trend, a clear association with anticyclonic eddies, and was not affected by hurricane-forced mixing. Expand
Trichodesmium – a widespread marine cyanobacterium with unusual nitrogen fixation properties
TLDR
Current knowledge, related to the optimization of its diazotrophic capacity, is explored, from genomics to ecophysiological processes, via, for example, cellular differentiation (diazocytes) and temporal regulations, and suggest cellular research avenues that now ought to be explored. Expand
Ecophysiology of the marine cyanobacterium Trichodesmium
TLDR
The most commonly applied nitrogen fixation measurement technique (Acetylene Reduction Assay) is improved by providing previously unavailable ethylene gas solubility coefficients that are required to accurately calculate nitrogen fixation rates. Expand
Epibionts dominate metabolic functional potential of Trichodesmium colonies from the oligotrophic ocean
TLDR
The presence of a core Trichodesmium microbiome that is modulated to suit different ocean regions, and contributes over 10 times the metabolic potential of Trichodemium to the holobiont is demonstrated. Expand
Diazotrophic cyanobacterium Trichodesmium spp. in China marginal seas: Comparison with other global seas
Abstract Trichodesmium spp. is probably the most important diazotroph in oligotrophic tropical and subtropical seas. Their N fixation relieves the restraining of N limitation to the marine primaryExpand
Common evolutionary origin of planktonic and benthic nitrogen-fixing oscillatoriacean cyanobacteria from tropical oceans.
TLDR
Evidence is presented that these benthic cyanobacteria are morphologically and phylogenetically very close to the planktonic species of Trichodesmium, suggesting that the main constituents of cyanobacterial benthos and plankton have an early common origin and both represent major contributors to nitrogen budget of tropical oceans today as in the distant geological past. Expand
Nitrogen Fixation in the Marine Cyanobacterium Trichodesmium
Over the past decade, the marine cyanobacteria Trichodesmiumspp. have received increasing attention [1,2], because of their ability to fix nitrogen in the presence of oxygen, and the recognition ofExpand
Metabolically active, non-nitrogen fixing, Trichodesmium in UK coastal waters during winter
TLDR
Observations of Trichodesmium when coupled with a numerical advection model indicate that Trichodemium communities can remain viable for >3.5 months at temperatures lower than previously expected, and suggests a cold- or low-light-adapted variant. Expand
The nitrogen physiology of the marine N2-fixing cyanobacteria Trichodesmium spp.
Trichodesmium spp. have proved to be enigmatic organisms, and their ecology and physiology are unusual among diazotrophs. Recent research shows that they can simultaneously fix N2 and take upExpand
Microbial diversity within the Trichodesmium holobiont.
TLDR
High-resolution 16S rDNA amplicon sequencing is used to examine the diversity of Trichodesmium and associated epibionts across different ocean regions and colony morphologies, suggesting that the colony types might define two distinct niches and that Epibiont assemblage might be driven in part by selective processes. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 80 REFERENCES
Nitrogen fixation, distribution, and production of Oscillatoria (Trichodesmium) spp. in the western Sargasso and Caribbean Seas1
TLDR
Oscillatoria appears to be of relatively little importance in the western Sargasso Sea, and this may be a major input of nitrogen to this area. Expand
Diel variation in nitrogen fixation by a marine blue-green alga, Trichodesmium thiebautii
Abstract A diel variation was demonstrated with respect to nitrogen fixing capacity of a marine blue-green alga, Trichodesmium thiebautii, collected from subtropical waters of the western NorthExpand
Nitrogen Fixation in the Marine Environment
TLDR
The minor contribution by nitrogen fixation to the overall nitrogen economy of the sea is not consistent with the supposition that nitrogen is the primary limiting nutrient and suggests that factors other than nitrogen availability limit phytoplankton growth rates. Expand
Marine oscillatoria (Trichodesmium): explanation for aerobic nitrogen fixation without heterocysts.
TLDR
In the sea, turbulence from wave action apparently separates trichomes allowing O2 to enter thus decreasing nitrogenase activity, explaining how Oscillatoria is able to fix N2 without heterocysts in an aerobic environment and why it blooms virtually always occur in calm seas. Expand
NITROGENASE CONFINED TO RANDOMLY DISTRIBUTED TRICHOMES IN THE MARINE CYANOBACTERIUM TRICHODESMIUM THIEBAUTII 1
TLDR
Nitrogenase showed a diel cycle in localization: present throughout the cytoplasm of cells in N2‐fixing colonies but at the periphery of non‐N2‐ Fixing (nighttime) colonies, which is novel and different from the previously held paradigm for this and other diazotrophic cyanobacteria. Expand
Arrangement of nitrogenase structural genes in an aerobic filamentous nonheterocystous cyanobacterium
TLDR
It is found that the organization of the nif genes in Trichodesmium sp. Expand
BACTERIAL ASSOCIATIONS WITH MARINE OSCILLATORIA SP. (TRICHODESMIUM SP.) POPULATIONS: ECOPHYSIOLOGICAL IMPLICATIONS 1
On three separate occasions we investigated morphological and physiological aspects of bacterial associations with planktonic aggregates of the ubiquitous marine N2 fixing cyanobacteriumExpand
Role of Trichodesmium spp. in the productivity of the subtropical North Pacific Ocean
TLDR
These observations, combined with primary production experiments conducted on isolated colonies, suggest that phytoplankton production is enhanced due to the release of NH,+ and dissolved organic nitrogen by Trichodesmium spp. Expand
Biogeochemical tracers of the marine cyanobacterium Trichodesmium
TLDR
The results support the supposition that the relatively low σ15N and high σ13C values observed in suspended and sediment-trapped material from some tropical and subtropical seas result from substantial input of C and N by Trichodesmium. Expand
Compartmentalisation of nitrogenase in a non-heterocystous cyanobacterium: Trichodesmium contortum
TLDR
The compartmentalisation of nitrogenase into a chain of cells and in a possibly photosynthetic environment represents a previously undescribed phenomenon in Trichodesmium contortum. Expand
...
1
2
3
4
5
...