Reexamination of the Metabolic Potentials of the Acetogens Clostridium aceticum and Clostridium formicoaceticum: Chemolithoautotrophic and Aromatic Dependent Growth
Both Clostridium formicoaceticum and Clostridium aceticum grew chemolithoautotrophically on carbon monoxide PlUS CO2 in defined medium in the absence of carbohydrates, amino acids, or other carbon and energy sources. Formate supported the growth of both organisms as well in both defined and undefined media (both of which also contained CO2). Hydrogen was stimulatory to the growth of C formicoaceticum upon first transfer into H-2-enriched formate medium; however, neither chemolithoautotrophic growth at the expense of H-2 plus CO2 nor hydrogenase could be demonstrated with this acetogen. Consistent with recent findings with other acetogens, numerous aromatic compounds were utilized by C aceticum and C. formicoaceticum: (i) aromatic methoxyl groups were O-demethylated; (ii) aromatic acrylates were reduced; and (iii) aromatic aldehydes were oxidized. These findings demonstrate that the metabolic potentials of these two acetogens are greater than previously recognized.
FEMS Microbiology Letters
Lux, M. F.,
Drake, H. L.
(1992). Reexamination of the Metabolic Potentials of the Acetogens Clostridium aceticum and Clostridium formicoaceticum: Chemolithoautotrophic and Aromatic Dependent Growth. FEMS Microbiology Letters, 95(1), 49-56.
Available at: http://aquila.usm.edu/fac_pubs/6857