Discovery of an endosymbiotic nitrogen-fixing cyanobacterium UCYN-A in Braarudosphaera bigelowii (Prymnesiophyceae). [PDF]
PLoS ONE, 2013 Braarudosphaera bigelowii (Prymnesiophyceae) is a coastal coccolithophore with a long fossil record, extending back to the late Cretaceous (ca. 100 Ma). A recent study revealed close phylogenetic relationships between B.
Kyoko Hagino +3 more
doaj +5 more sources
The Transcriptional Cycle Is Suited to Daytime N2 Fixation in the Unicellular Cyanobacterium “
mBio, 2019 Symbiosis between a marine alga and a N2-fixing cyanobacterium (Cyanobacterium UCYN-A) is geographically widespread in the oceans and is important in the marine N cycle. UCYN-A is uncultivated and is an unusual unicellular cyanobacterium because it lacks
María del Carmen Muñoz-Marín +5 more
doaj +8 more sources
Significant contribution of the unicellular cyanobacterium UCYN-B to oceanic nitrogen fixation [PDF]
National Science ReviewABSTRACT Dinitrogen (N2) fixation by diazotrophs forms a critical control on ocean productivity, yet our understanding of the distribution, abundance and activity of these microorganisms is informed by observations with limited geographical coverage.
Xin Liu, Dalin Shi, Xinran Yu
exaly +6 more sources
UCYN-A/haptophyte symbioses dominate N2 fixation in the Southern California Current System [PDF]
ISME Communications, 2021 Abstract The availability of fixed nitrogen (N) is an important factor limiting biological productivity in the oceans. In coastal waters, high dissolved inorganic N concentrations were historically thought to inhibit dinitrogen (N2) fixation, however, recent N2 fixation measurements and the presence of the N2-fixing UCYN-A/haptophyte ...
Kendra A Turk-Kubo +7 more
openaire +6 more sources
Microevolutionary patterns in ecotypes of the symbiotic cyanobacterium UCYN-A revealed from a Northwest Atlantic coastal time series [PDF]
Science Advances, 2023 UCYN-A is a globally important nitrogen-fixing symbiotic microbe often found in colder regions and coastal areas where nitrogen fixation has been overlooked. We present a 3-year coastal Northwest Atlantic time series of UCYN-A by integrating oceanographic data with weekly nifH and16 S rRNA ...
Brent M Robicheau +2 more
exaly +4 more sources
Metagenomics reveals the genetic diversity between sublineages of UCYN-A and their algal host plastids [PDF]
ISME CommunicationsAbstract UCYN-A (or Cand. Atelocyanobacterium thalassa) has been recognized as a globally distributed, early stage, nitrogen-fixing organelle (the “nitroplast”) of cyanobacterial origin present in the haptophyte alga Braarudosphaera bigelowii.
Brent M Robicheau +2 more
exaly +4 more sources
Symbiotic UCYN-A strains co-occurred with El Niño, relaxed upwelling, and varied eukaryotes over 10 years off Southern California. [PDF]
ISME Commun, 2023 Abstract Biological nitrogen fixation, the conversion of N2 gas into a bioavailable form, is vital to sustaining marine primary production. Studies have shifted beyond traditionally studied tropical diazotrophs. Candidatus Atelocyanobacterium thalassa (or UCYN-A) has emerged as a focal point due to its streamlined metabolism, intimate ...
Fletcher-Hoppe C +4 more
europepmc +6 more sources
The effect of nutrients on carbon and nitrogen fixation by the UCYN-A–haptophyte symbiosis [PDF]
The ISME Journal, 2014 Abstract Symbiotic relationships between phytoplankton and N2-fixing microorganisms play a crucial role in marine ecosystems. The abundant and widespread unicellular cyanobacteria group A (UCYN-A) has recently been found to live symbiotically with a haptophyte. Here, we investigated the effect of nitrogen (N), phosphorus (P), iron (Fe)
Krupke, A. +5 more
openaire +5 more sources
UCYN‐A3, a newly characterized open ocean sublineage of the symbiotic N 2 ‐fixing cyanobacterium Candidatus Atelocyanobacterium thalassa [PDF]
Environmental Microbiology, 2018 Summary The symbiotic unicellular cyanobacterium Candidatus Atelocyanobacterium thalassa (UCYN‐A) is one of the most abundant and widespread nitrogen (N 2 )‐fixing cyanobacteria in the ocean.
Cornejo‐Castillo, Francisco M. +6 more
core +8 more sources
Latitudinal constraints on the abundance and activity of the cyanobacterium UCYN‐A and other marine diazotrophs in the North Pacific [PDF]
Limnology and Oceanography, 2020 AbstractThe number of marine environments known to harbor dinitrogen (N2)‐fixing (diazotrophic) microorganisms is increasing, prompting a reassessment of the biogeography of marine diazotrophs and N2fixation rates (NFRs). Here, we investigate the diversity, abundance, and activity of diazotrophic microorganisms in the North Pacific Subtropical Gyre ...
Mary R. Gradoville +11 more
openaire +4 more sources