Hydrogen Transfer Between Neocallimastix Frontalis and Selenomonas Ruminantium Grown in Mixed Culture
The anaerobic fungus Neocallimastix frontalis ferments cellulose to H2, C02, formate, acetate, lactate and ethanol (Bauchop & Mountfort, 1981). Succinate is also a fermentation product of some anaerobic fungi (Prins & Marvin-Sikkema, personal communication, Richardson et al., 1989). Theoretically, all of these products could be utilised by other microorganisms. However not all of these potential interactions are likely to occur in the gut. For example, acetate supports the growth of some methanogens in anaerobic ecosystems with slow turnover times, but in the gut acetate is not an important substrate for methanogenesis (Reviewed by Stewart et al., this symposium). Some other potential interactions based on the utilisation of fungal fermentation products are summarised schematically in Fig 1, which is compiled from the known properties of the named microorganisms (Hungate, 1966; Stewart & Bryant, 1988).
KeywordsMixed Culture Fermentation Product Anaerobic Fungus Rumen Fungus Anaerobic Rumen
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