[Ability of obligate methylotrophs to perform nitrogen fixation]. 1977

V A Romanovskaia, and Z P Shurova, and V V Iurchenko, and L V Tkachuk, and Iu R Malashenko

The ability for nitrification was studied among mesophilic and thermophilic cultures of obligate methylotrophs Methylobacter ucrainicus, Methylomonas methanica, and Methylococcus thermophilus. The strains were almost incapable of nitrification under autotrophic conditions. In the presence of methane, however, they oxidized NH+4 TO NO-2: over 150 mg/litre NO-2 nitrogen was found in the cultural broth. Therefore, obligate methylotrophs are capable of heterotrophic nitrification. The level of nitrification suggests that it is not a side reaction but a necessary stage of the metabolism of obligate methylotrophs. The phenotype relation between obligate methylotrophs and nitrifying organisms is discussed.

UI MeSH Term Description Entries
D008772 Methylococcaceae A family of gram-negative, aerobic bacteria utilizing only one-carbon organic compounds and isolated from in soil and water. Methane-Oxidizing Bacteria,Methanomonadaceae,Methylomonadaceae,Methane Oxidizing Bacteria,Methylmonadaceae
D009576 Nitrobacter A genus of gram-negative, rod-shaped bacteria that oxidizes nitrites to nitrates. Its organisms occur in aerobic environments where organic matter is being mineralized, including soil, fresh water, and sea water.
D009586 Nitrogen Fixation The process in certain BACTERIA; FUNGI; and CYANOBACTERIA converting free atmospheric NITROGEN to biologically usable forms of nitrogen, such as AMMONIA; NITRATES; and amino compounds. Diazotrophy,Diazotrophic Activity,Dinitrogen Fixation,N2 Fixation,Activities, Diazotrophic,Activity, Diazotrophic,Diazotrophic Activities,Fixation, Dinitrogen,Fixation, N2,Fixation, Nitrogen
D009626 Terminology as Topic Works about the terms, expressions, designations, or symbols used in a particular science, discipline, or specialized subject area. Etymology,Nomenclature as Topic,Etymologies
D001419 Bacteria One of the three domains of life (the others being Eukarya and ARCHAEA), also called Eubacteria. They are unicellular prokaryotic microorganisms which generally possess rigid cell walls, multiply by cell division, and exhibit three principal forms: round or coccal, rodlike or bacillary, and spiral or spirochetal. Bacteria can be classified by their response to OXYGEN: aerobic, anaerobic, or facultatively anaerobic; by the mode by which they obtain their energy: chemotrophy (via chemical reaction) or PHOTOTROPHY (via light reaction); for chemotrophs by their source of chemical energy: CHEMOLITHOTROPHY (from inorganic compounds) or chemoorganotrophy (from organic compounds); and by their source for CARBON; NITROGEN; etc.; HETEROTROPHY (from organic sources) or AUTOTROPHY (from CARBON DIOXIDE). They can also be classified by whether or not they stain (based on the structure of their CELL WALLS) with CRYSTAL VIOLET dye: gram-negative or gram-positive. Eubacteria

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