Trichodesmium, also called sea sawdust, is a genus of filamentous cyanobacteria. They are found in nutrient poor tropical and subtropical ocean waters (particularly around Australia and in the Red Sea, where they were first described by Captain Cook). Trichodesmium is a diazotroph; that is, it fixes atmospheric nitrogen into ammonium, a nutrient used by other organisms. Trichodesmium is thought to fix nitrogen on such a scale that it accounts for almost half of the nitrogen fixation in marine systems globally.[1]Trichodesmium is the only known diazotroph able to fix nitrogen in daylight under aerobic conditions without the use of heterocysts.[2]
Trichodesmium can live as individual filaments, with tens to hundreds of cells strung together, or in colonies consisting of tens to hundreds of filaments clustered together.[3] These colonies are visible to the naked eye and sometimes form blooms, which can be extensive on surface waters. These large blooms led to widespread recognition as "sea sawdust/straw"; in fact, the Red Sea gets most of its eponymous colouration from the corresponding pigment in Trichodesmium erythraeum. Colonies of Trichodesmium provide a pseudobenthic substrate for many small oceanic organisms including bacteria, diatoms, dinoflagellates, protozoa, and copepods (which are its primary predator); in this way, the genus can support complex microenvironments.
^Bergman, B.; Sandh, G.; Lin, S.; Larsson, H.; Carpenter, E. J. (2012). "Trichodesmium – a widespread marine cyanobacterium with unusual nitrogen fixation properties". FEMS Microbiol. Rev. 37 (3): 1–17. doi:10.1111/j.1574-6976.2012.00352.x. PMC 3655545. PMID 22928644.
^Carpenter, E.J.; Capone, D.G.; Rueter, J.G., eds. (1991). Marine Pelagic Cyanobacteria: Trichodesmium and other diazothrophs. Dordrecht.: Kluwer Academic Publishers.
^Capone, Douglas G.; Zehr, Jonathan P.; Paerl, Hans W.; Bergman, Birgitta; Carpenter, Edward J. (1997-05-23). "Trichodesmium, a Globally Significant Marine Cyanobacterium". Science. 276 (5316): 1221–1229. doi:10.1126/science.276.5316.1221. ISSN 0036-8075. S2CID 53710858.
Trichodesmium, also called sea sawdust, is a genus of filamentous cyanobacteria. They are found in nutrient poor tropical and subtropical ocean waters...
Trichodesmium erythraeum is a marine cyanobacteria species characterized by its prolific diazotrophic capabilities. They play a dominant role in the ocean...
Trichodesmium thiebautii is a cyanobacteria that is often found in open oceans of tropical and subtropical regions and is known to be a contributor to...
domain Bacteria including cyanobacteria (e.g. the highly significant Trichodesmium and Cyanothece), green sulfur bacteria, purple sulfur bacteria, Azotobacteraceae...
the open ocean: Crocosphaera and relatives, cyanobacterium UCYN-A, Trichodesmium, as well as Prochlorococcus and Synechococcus. From these lineages,...
often lend a blue-green color. The Red Sea has occasional blooms of red Trichodesmium erythraeum algae.[citation needed] Particles in water can scatter light...
name of the sea may signify the seasonal blooms of the red-coloured Trichodesmium erythraeum near the water's surface. A theory favored by some modern...
new class of fluorescent protein was evolved from a cyanobacterial (Trichodesmium erythraeum) phycobiliprotein, α-allophycocyanin, and named small ultra...
enhances nitrogen fixation and growth in the marine cyanobacterium Trichodesmium". Global Change Biology. 13 (2): 531–538. Bibcode:2007GCBio..13..531L...
and Trichodesmium are speculated to play an important role in the redistribution of nitrogen and carbon in and out of the euphotic zone. Trichodesmium is...
oxidation of amino acids and nitrogen cycling by the marine bacterium Trichodesmium. Her subsequent work investigated nitrogen cycling in harmful algae...
sometimes attribute the name to the seasonal blooms of the red-hued Trichodesmium erythraeum in the Red Sea. Agatharchides had written of the origin of...
Synechococcus do not fix nitrogen, whilst other marine cyanobacteria, such as Trichodesmium and Cyanothece, are major contributors to oceanic nitrogen fixation...
are six Prochlorococcus strains, seven marine Synechococcus strains, Trichodesmium erythraeum IMS101 and Crocosphaera watsonii WH8501. Several studies...
new class of fluorescent protein was evolved from a cyanobacterial (Trichodesmium erythraeum) phycobiliprotein, α-allophycocyanin, and named small ultra...
Azotobacter, Anabaena, and Clostridium) , symbiotic (ex. Rhizobium and Trichodesmium) and associative symbiotic (ex. Azospirillum). These organisms have...
cell-specific phosphorus stress using Trichodesmium as a model cyanobacteria, and specifically examined how use Trichodesmium use phosphonate in the ocean. A...
major animal and plant species. Bloom of the filamentous cyanobacteria Trichodesmium Cyanobacteria blooms can contain lethal cyanotoxins. Synechococcus,...
[citation needed]. The assumption that N2 fixation only occurred via Trichodesmium and Richelia led to the conclusion that in the oceans, nitrogen output...
examined the factors controlling the bloom forming marine phytoplankton Trichodesmium. White's past research includes harmful algal blooms and microplastics...
even some specific types of bloom (e.g. Coccolithophore blooms and Trichodesmium blooms). The capability of real-time monitoring by combined use of long...
photoinhibition. However, some exceptions of photosynthetic organisms, e.g., Trichodesmium, Synechococcus, or Sargassum, show more tolerance towards high light...
regulated by cyanophages. In certain species of cyanobacteria, such as Trichodesmium that perform nitrogen fixation, cyanophages are capable of increasing...
; Paerl, Hans W.; Bergman, Birgitta; Carpenter, Edward J. (1997). "Trichodesmium , a Globally Significant Marine Cyanobacterium". Science. 276 (5316):...
associated with Trichodesmium, a filamentous cyanobacteria that fixes nitrogen in the oceans. Alteromonas macleodii might influence Trichodesmium metabolism...
includes investigations into nutrient cycling in model organisms including Trichodesmium, Prorocentrum, and Synechococcus. Glibert's research encompasses issues...
Global Information
