Influence of colloidal iron on the respiration of a species of the genus Acinetobacter.
Washed suspensions of Acinetobacter sp. isolated from water caused the precipitation of iron from a suspension of colloidal ferric iron at pH 6.0 and 7.6. Iron-encrusted cells of the bacterium formed large aggregates. The amount of iron removed from the colloidal preparation in the form of aggregates was from 21 to 52% at pH 7.6 and 49% an pH 6.0 by the bacterial cells. Endogenous respiration rates of the iron-encrusted cells were from 32 to 72% lower than the rates for unencrusted cells. Respiration rates, measured polarographically in the presence of glucose, were also greatly reduced by the coating of iron on the cells.
D000150:Acinetobacter / Q000378:metabolism* / Q000648:ultrastructure; D000421:Alcaligenes / Q000378:metabolism*; D002473:Cell Wall / Q000648:ultrastructure; D011232:Chemical Precipitation; D003102:Colloids; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000494:pharmacology*; D008854:Microscopy, Electron; D010101:Oxygen Consumption / Q000187:drug effects*; D011048:Polarography; D014871:Water Microbiology
D003102:Colloids; D007501:Iron