Sandaa R A, Enger O, Torsvik V
Department of Microbiology, University of Bergen, N-5020 Bergen, Norway.
Appl Environ Microbiol. 1999 Aug;65(8):3293-7. doi: 10.1128/AEM.65.8.3293-3297.1999.
The impact of heavy-metal contamination on archaean communities was studied in soils amended with sewage sludge contaminated with heavy metals to varying extents. Fluorescent in situ hybridization showed a decrease in the percentage of Archaea from 1.3% +/- 0.3% of 4', 6-diamidino-2-phenylindole-stained cells in untreated soil to below the detection limit in soils amended with heavy metals. A comparison of the archaean communities of the different plots by denaturing gradient gel electrophoresis revealed differences in the structure of the archaean communities in soils with increasing heavy-metal contamination. Analysis of cloned 16S ribosomal DNA showed close similarities to a unique and globally distributed lineage of the kingdom Crenarchaeota that is phylogenetically distinct from currently characterized crenarchaeotal species.
研究了不同程度重金属污染的污泥改良土壤中,重金属污染对古菌群落的影响。荧光原位杂交显示,古菌在未处理土壤中占4',6-二脒基-2-苯基吲哚染色细胞的1.3%±0.3%,而在用重金属改良的土壤中,古菌比例降至检测限以下。通过变性梯度凝胶电泳比较不同样地的古菌群落,发现随着土壤中重金属污染程度的增加,古菌群落结构存在差异。对克隆的16S核糖体DNA的分析表明,其与泉古菌界一个独特的、全球分布的谱系密切相似,该谱系在系统发育上与目前已鉴定的泉古菌物种不同。