Desulfovibrio - Sulfate Reducing Bacteria.pdf

Desulfovibrio is a genus of Gram-negative sulfate-reducing bacteria which reduce sulfates to hydrogen sulfide. Desulfovibrio species are commonly found in aquatic environments with high levels of organic material, as well as in waterlogged soils, and form major community members of extreme oligotrophic habitats such as deep granitic fractured rock aquifers. Like other sulfate-reducing bacteria, Desulfovibrio was long considered to be obligately anaerobic. This is not strictly correct: while growth may be limited, these bacteria can survive in O2-rich environments. These types of bacteria are known as aerotolerant. They are found in sea water, marine mud, fresh water and soil. To the marine sample and fresh water sample 60mL enrichment bottles, 0.1 gram of benthic mud from the Winogradsky column was dropped using a serological pipette.