Zusammenfassung
Die mikrobiellen Stoffwechselprozesse des Abbaus (Katabolismus oder Energiestoffwechsel) in Böden sind gekennzeichnet durch eine Vielfalt an Wasserstoff(Elektronen)-Donatoren (organische und anorganische Substrate) und Wasserstoff(Elektronen)-Akzeptoren (organische und anorganische e-Akzeptoren). Im Stoffwechsel sind Oxidationen mit der Abgabe von Wasserstoff bzw. Elektronen verbunden, die dabei auf einen Akzeptor im oxidierten Zustand übertragen werden (Thauer et al. 1977; McGill 2007). Dieser wird somit reduziert (Redoxreaktionen). Zweck dieser Redox-Prozesse ist die Konservierung von Energie (ATP-Synthese) im Energiestoffwechsel und ihre Bereitstellung im Baustoffwechsel (Anabolismus) (Abb. 3.1). Die verschiedenen Stoffwechselwege stellen einerseits die Vorstufen (Metabolite) für die Syntheseprozesse zur Verfügung, andererseits liefern sie Energie (Reduktionsäquivalente, ATP) für lebenswichtige Vorgänge. Der Energiestoffwechsel ist ein exergones Redox-System (wobei Energie frei wird) und besteht dazu aus Elektronen abgebenden und aufnehmenden Reaktionen, die durch Elektronenträger (Carrier) gekoppelt sind.
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Ottow, J. (2011). Ökophysiologie der Bodenbakterien und -pilze. In: Mikrobiologie von Böden. Springer-Lehrbuch. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-00824-5_3
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