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Trichodesmium, a Globally Significant Marine Cyanobacterium
N2 fixation by Trichodesmium is likely a major input to the marine and global nitrogen cycle.
Diverse taxa of cyanobacteria produce beta-N-methylamino-L-alanine, a neurotoxic amino acid.
- P. Cox, S. Banack, B. Bergman
- Biology, Environmental ScienceProceedings of the National Academy of Sciences…
- 5 April 2005
It is reported here that a single neurotoxin, beta-N-methylamino-L-alanine, may be produced by all known groups of cyanobacteria, including cyanobacterial symbionts and free-living cyanob bacteria.
Dinitrogen fixation in the world's oceans
The surface water of themarine environment has traditionally beenviewed as a nitrogen (N) limited habitat, andthis has guided the development of conceptualbiogeochemical models focusing largely on…
BASIC: Baltic Sea cyanobacteria. An investigation of the structure and dynamics of water blooms of cyanobacteria in the Baltic Sea responses to a changing environment.
Transfer of a cyanobacterial neurotoxin within a temperate aquatic ecosystem suggests pathways for human exposure
- Sara Jonasson, J. Eriksson, B. Bergman
- Environmental ScienceProceedings of the National Academy of Sciences
- 3 May 2010
It is demonstrated, based on a recently developed extraction and HPLC-MS/MS method and long-term monitoring of BMAA in cyanobacterial populations of a temperate aquatic ecosystem (Baltic Sea, 2007–2008), that BMAA is biosynthesized by cyanob bacterial genera dominating the massive surface blooms of this water body.
Segregation of Nitrogen Fixation and Oxygenic Photosynthesis in the Marine Cyanobacterium Trichodesmium
- I. Berman‐Frank, Pernilla Lundgren, P. Falkowski
- Biology, Environmental ScienceScience
- 16 November 2001
It is postulate that in the early evolutionary phase of oxygenic photosynthesis, nitrogenase served as an electron acceptor for anaerobic heterotrophic metabolism and that PSI was favored by selection because it provided a micro-anaerobic environment for N2 fixation in cyanobacteria.
N2 Fixation by Unicellular Bacterioplankton from the Atlantic and Pacific Oceans: Phylogeny and In Situ Rates
- L. Falcón, E. Carpenter, F. Cipriano, B. Bergman, D. Capone
- Environmental ScienceApplied and Environmental Microbiology
- 1 February 2004
Unicellular cyanobacteria from the tropical North Atlantic and subtropical North Pacific share a common ancestry (16S rDNA) and that potential unicellular N2 fixers have diverged (nifH), and rates of fixation by bacterioplankton can be almost as high as those by the colonial N2-fixing marine cyanob bacteria Trichodesmium spp.
Genome fluctuations in cyanobacteria reflect evolutionary, developmental and adaptive traits
The different rates of genome-size evolution and multi-copy gene abundance suggest two routes of genome development in the history of cyanobacteria, which are driven by gene-family enlargment and generates a broad adaptive potential; while the genome streamlining strategy imposes adaptations to highly specific niches.
Analytical protocol for identification of BMAA and DAB in biological samples.
A robust and sensitive method for high confidence identification of BMAA after derivatization by 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate (AQC) and applicable for selective BMAA/DAB detection in various biological samples ranging from a prokaryotic cyanobacterium to eukaryotic fish.