Furthermore, the four species of Syntrophobacter and Desulfotomaculum thermocisternum have ability to axcenically grow on propionate oxidation coupling with sulfate or fumarate reduction in the deficiency of methanogens (Wallrabenstein et al., 1995; Nilsen et al., 1996; Harmsen et al., 1998; Chen et al., 2005).
Low G+C Gram positive bacteria contain Desulfotomaculum and Pelotomaculum and these two genera belong to Desulfotomaculum Cluster I that is usually recognized as sulfate-reducing bacteria and have habitually been observed in different anoxic habitats (Hristova et al., 2000; Plugge et al., 2002).
Desulfovibrio, Desulfotomaculum, Desulfosarcina, Desulfococcus spp.
The predominant bacterial genera identified were Bacillus, Pseudomonas, Desulfotomaculum, Desulfovibrio, Desulfomonas, Methylococcus, Vibrio, Micrococcus, Klebsiella and Azotobacter.
O sulfeto de hidrogenio (gas sulfidrico ou [H.sub.2]S) E produto normal do metabolismo da microbiota ruminal e as bactErias do genero Desulfovibrio e
Desulfotomaculum sao as responsaveis pela degradacao do sulfato, especialmente em sulfeto de hidrogenio, sendo este eructado ou absorvido e/ou usado na sintese da proteina microbiana (1).
That is not to say that future Mars landers should arrive with life- detection equipment tuned to zero in on species of Desulfovibrio or
Desulfotomaculum. There is no reason to believe that life on Mars, if it ever emerged, evolved along the same lines as life on Earth, let alone that identical species appeared on the two planets.