Modeling dynamic oxygen permeability as a mechanism to mitigate oxygen-induced stresses on photosynthesis and N2 fixation in marine Trichodesmium [PDF]
Microbiology SpectrumTrichodesmium, the predominant marine diazotrophic cyanobacterium, concurrently performs nitrogen (N2) fixation and photosynthesis, the latter of which produces oxygen (O2) that inhibits N2 fixation.
Weicheng Luo +4 more
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N2 Fixation in Trichodesmium Does Not Require Spatial Segregation from Photosynthesis [PDF]
mSystems, 2022 The dominant marine filamentous N2 fixer, Trichodesmium, conducts photosynthesis and N2 fixation during the daytime. Because N2 fixation is sensitive to O2, some previous studies suggested that spatial segregation of N2 fixation and photosynthesis is ...
Weicheng Luo +3 more
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Metabolic biochemical models of N2 fixation for sulfide oxidizers, methanogens, and methanotrophs [PDF]
mSystemsDinitrogen (N2) fixation provides bioavailable nitrogen to the biosphere. However, in some habitats (e.g., sediments), the metabolic pathways of organisms carrying out N2 fixation are unclear. We present metabolic models representing various chemotrophic
Meng Gao +11 more
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Variation in symbiotic N2 fixation rates among Sphagnum mosses. [PDF]
PLoS ONE, 2020 Biological nitrogen (N) fixation is an important process supporting primary production in ecosystems, especially in those where N availability is limiting growth, such as peatlands and boreal forests.
Eva van den Elzen +4 more
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Temperate southern Australian coastal waters are characterised by surprisingly high rates of nitrogen fixation and diversity of diazotrophs [PDF]
PeerJ, 2021 Biological dinitrogen (N2) fixation is one mechanism by which specific microorganisms (diazotrophs) can ameliorate nitrogen (N) limitation. Historically, rates of N2 fixation were believed to be limited outside of the low nutrient tropical and ...
Lauren F. Messer +4 more
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Nitrogen fixation: A poorly understood process along the freshwater‐marine continuum
Limnology and Oceanography Letters, 2022 N2 fixation is a major component of the global N cycle and has been extensively studied in open‐ocean and terrestrial ecosystems. Yet rates and ecological dynamics remain virtually unknown for the inland and coastal aquatic ecosystems (lakes, wetlands ...
Amy M. Marcarelli +2 more
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Contrasting seasonal responses in dinitrogen fixation between shallow and deep-water colonies of the model coral Stylophora pistillata in the northern Red Sea. [PDF]
PLoS ONE, 2018 Tropical corals are often associated with dinitrogen (N2)-fixing bacteria (diazotrophs), and seasonal changes in key environmental parameters, such as dissolved inorganic nitrogen (DIN) availability and seawater temperature, are known to affect N2 ...
Vanessa N Bednarz +6 more
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Levels of daily light doses under changed day-night cycles regulate temporal segregation of photosynthesis and N2 Fixation in the cyanobacterium Trichodesmium erythraeum IMS101. [PDF]
PLoS ONE, 2015 While the diazotrophic cyanobacterium Trichodesmium is known to display inverse diurnal performances of photosynthesis and N2 fixation, such a phenomenon has not been well documented under different day-night (L-D) cycles and different levels of light ...
Xiaoni Cai, Kunshan Gao
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Dinitrogen fixation in aphotic oxygenated marine environments
Frontiers in Microbiology, 2013 We measured N2 fixation rates from oceanic zones that have traditionally been ignored as sources of biological N2 fixation; the aphotic, fully oxygenated, nitrate (NO3-)-rich, waters of the oligotrophic Levantine Basin (LB) and the Gulf of Aqaba (GA). N2
Eyal eRahav +7 more
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Light-limited growth rate modulates nitrate inhibition of dinitrogen fixation in the marine unicellular cyanobacterium Crocosphaera watsonii. [PDF]
PLoS ONE, 2014 Biological N2 fixation is the dominant supply of new nitrogen (N) to the oceans, but is often inhibited in the presence of fixed N sources such as nitrate (NO3-).
Nathan S Garcia, David A Hutchins
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