Abstract The most abundant organic materials on Earth are plant polysaccharides such as cellulose and hemicelluloses. Inasmuch as vast quantities of these polymers are present in anaerobic environments (e.g., in soils and sediments), anaerobic microorganisms that ferment plant polysaccharides play a central role in carbon cycling on the planet as a source of CO2 and, indirectly, of CH4. Cellulose-fermenting bacteria from soil and pond sediment were isolated in a medium (incubated in N2) which lacked a source of combined nitrogen. The isolates had the ability to utilize atmospheric N2 as the nitrogen source for cell growth. Nitrogenase (the enzyme which catalyzes the reduction of N2 to ammonia) was demonstrated by means of the acetylene reduction test in these isolates and in several previously described anaerobic cellulolytic bacteria isolated from various natural environments. Thus, cellulose-fermenting bacteria that fix N2 may be widespread and may play a role in nitrogen cycling as well as in carbon cycling on a global scale. Knowledge of the physiology and ecology of these organisms is crucial to detailing the mechanisms producing local sources and sinks of atmospheric gases, interpreting data obtained using space-based sensors, and understanding the effects of atmospheric warming on fermentations as major sources of CO2 and CH4.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Carbon cycling by cellulose-fermenting nitrogen-fixing bacteria


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    1989-01-01


    Format / Umfang :

    4 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    CYCLING SHOE FIXING DEVICE

    KAO BRYAN WEILUEN | Europäisches Patentamt | 2020

    Freier Zugriff

    Cycling shoe fixing device

    KAO BRYAN WEILUEN | Europäisches Patentamt | 2020

    Freier Zugriff

    Thermofluiddynamics Inside Industrial Cylindroconical Fermenting Tank

    Meironke, H. / Szymczyk, J. / Leder, A. et al. | British Library Conference Proceedings | 2006


    Thermofluiddynamics Inside Industrial Cylindroconical Fermenting Tank

    Meironke, Heiko / Szymczyk, Janusz A. / Leder, Alfred | AIAA | 2006


    Oxidation of regenerated cellulose with nitrogen dioxide/carbon tetrachloride

    Wu, Y. D. / He, J. M. / Huang, Y. D. et al. | British Library Online Contents | 2012