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Genomics and Ecophysiology of Heterotrophic Nitrogen-Fixing Bacteria Isolated from Estuarine Surface Water.

Bentzon-Tilia M, Severin I, Hansen LH, Riemann L - MBio (2015)

Bottom Line: Nitrogenase reductase gene (nifH) composition suggests that putative N2-fixing heterotrophic organisms are widespread in marine bacterioplankton, but their autecology and ecological significance are unknown.P. stutzeri BAL361 did, however, fix N at up to 165 µmol O2 liter(-1), presumably accommodated through aggregate formation.The lack of correlations between nitrogenase reductase gene expression and ethylene (C2H4) production indicated tight posttranscriptional-level control.

View Article: PubMed Central - PubMed

Affiliation: Marine Biological Section, Department of Biology, University of Copenhagen, Helsingør, Denmark.

No MeSH data available.


Related in: MedlinePlus

Amino acid sequence-based, unrooted, neighbor-joining tree showing the affiliations of the isolates with the canonical nifH clusters (37). Color-coded lines indicate cluster affiliations as shown in the key. Pseudomonas stutzeri BAL361 represents the gammaproteobacterial part of cluster I, Rhodopseudomonas palustris BAL398 represents the alphaproteobacterial part of cluster I, and R. ornithinolytica BAL286 represents the gammaproteobacterial part of cluster I, as well as cluster II.
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fig1: Amino acid sequence-based, unrooted, neighbor-joining tree showing the affiliations of the isolates with the canonical nifH clusters (37). Color-coded lines indicate cluster affiliations as shown in the key. Pseudomonas stutzeri BAL361 represents the gammaproteobacterial part of cluster I, Rhodopseudomonas palustris BAL398 represents the alphaproteobacterial part of cluster I, and R. ornithinolytica BAL286 represents the gammaproteobacterial part of cluster I, as well as cluster II.

Mentions: The nifH and anfH gene sequences suggested that the isolates represented the alphaproteobacterial and gammaproteobacterial parts of the canonical nifH cluster I (37), as well as the archeal and FeFe nitrogenase-containing cluster II (Fig. 1).


Genomics and Ecophysiology of Heterotrophic Nitrogen-Fixing Bacteria Isolated from Estuarine Surface Water.

Bentzon-Tilia M, Severin I, Hansen LH, Riemann L - MBio (2015)

Amino acid sequence-based, unrooted, neighbor-joining tree showing the affiliations of the isolates with the canonical nifH clusters (37). Color-coded lines indicate cluster affiliations as shown in the key. Pseudomonas stutzeri BAL361 represents the gammaproteobacterial part of cluster I, Rhodopseudomonas palustris BAL398 represents the alphaproteobacterial part of cluster I, and R. ornithinolytica BAL286 represents the gammaproteobacterial part of cluster I, as well as cluster II.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4495170&req=5

fig1: Amino acid sequence-based, unrooted, neighbor-joining tree showing the affiliations of the isolates with the canonical nifH clusters (37). Color-coded lines indicate cluster affiliations as shown in the key. Pseudomonas stutzeri BAL361 represents the gammaproteobacterial part of cluster I, Rhodopseudomonas palustris BAL398 represents the alphaproteobacterial part of cluster I, and R. ornithinolytica BAL286 represents the gammaproteobacterial part of cluster I, as well as cluster II.
Mentions: The nifH and anfH gene sequences suggested that the isolates represented the alphaproteobacterial and gammaproteobacterial parts of the canonical nifH cluster I (37), as well as the archeal and FeFe nitrogenase-containing cluster II (Fig. 1).

Bottom Line: Nitrogenase reductase gene (nifH) composition suggests that putative N2-fixing heterotrophic organisms are widespread in marine bacterioplankton, but their autecology and ecological significance are unknown.P. stutzeri BAL361 did, however, fix N at up to 165 µmol O2 liter(-1), presumably accommodated through aggregate formation.The lack of correlations between nitrogenase reductase gene expression and ethylene (C2H4) production indicated tight posttranscriptional-level control.

View Article: PubMed Central - PubMed

Affiliation: Marine Biological Section, Department of Biology, University of Copenhagen, Helsingør, Denmark.

No MeSH data available.


Related in: MedlinePlus