Carpenter E J, Lin S, Capone D G
Marine Sciences Research Center, State University of New York, Stony Brook, New York 11794, USA.
Appl Environ Microbiol. 2000 Oct;66(10):4514-7. doi: 10.1128/AEM.66.10.4514-4517.2000.
Large populations (200 to 5,000 cells ml(-1) in snowmelt) of bacteria were present in surface snow and firn from the south pole sampled in January 1999 and 2000. DNA isolated from this snow yielded ribosomal DNA sequences similar to those of several psychrophilic bacteria and a bacterium which aligns closely with members of the genus Deinococcus, an ionizing-radiation- and desiccation-resistant genus. We also obtained evidence of low rates of bacterial DNA and protein synthesis which indicates that the organisms were metabolizing at ambient subzero temperatures (-12 to -17 degrees C).
1999年1月和2000年1月在南极采集的表层雪和积雪中存在大量细菌（融雪中每毫升200至5000个细胞）。从这些雪中分离出的DNA产生的核糖体DNA序列与几种嗜冷细菌以及一种与耐辐射和耐干燥的嗜热栖热菌属成员密切相关的细菌相似。我们还获得了细菌DNA和蛋白质合成速率较低的证据，这表明这些生物体在环境零下温度（-12至-17摄氏度）下进行代谢。
