Caccavo F, Ramsing N B, Costerton J W
Center for Biofilm Engineering, Montana State University, Bozeman 59717, USA.
Appl Environ Microbiol. 1996 Dec;62(12):4678-82. doi: 10.1128/aem.62.12.4678-4682.1996.
The response of the dissimilatory metal-reducing bacterium Shewanella alga BrY to carbon and nitrogen starvation was examined. Starvation resulted in a gradual decrease in the mean cell volume from 0.48 to 0.2 micron 3 and a dramatic decrease in Fe(III) reductase activity. Growth of starved cultures was initiated with O2, ferric oxyhydroxide, Co(III)-EDTA, or Fe(III)-bearing subsurface materials as the sole electron acceptor. Microbially reduced subsurface materials reduced CrO(4)2-. Starvation of dissimilatory metal-reducing bacteria may provide a means of delivering this metabolism to contaminated subsurface environments for in situ bioremediation.
研究了异化金属还原菌海藻希瓦氏菌BrY对碳和氮饥饿的反应。饥饿导致平均细胞体积从0.48立方微米逐渐减小至0.2立方微米，同时铁（III）还原酶活性急剧下降。饥饿培养物的生长以氧气、氢氧化铁、Co（III）-EDTA或含Fe（III）的地下材料作为唯一电子受体启动。微生物还原的地下材料可还原CrO(4)2-。异化金属还原菌的饥饿可能为将这种代谢作用应用于受污染的地下环境进行原位生物修复提供一种手段。
