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| DOI | 10.1073/pnas.97.3.1247 |
| A habitat for psychrophiles in deep Antarctic ice | |
| Price P.B. | |
| 发表日期 | 2000 |
| ISSN | 0027-8424 |
| 起始页码 | 1247 |
| 结束页码 | 1251 |
| 卷号 | 97期号:3 |
| 英文摘要 | Microbes, some of which may be viable, have been found in ice cores drilled at Vostok Station at depths down to ≃3,600 m, close to the surface of the huge subglacial Lake Vostok. Two types of ice have been found. The upper 3,500 m comprises glacial ice containing traces of nutrients of aeolian origin including sulfuric acid, nitric acid, methanosulfonic acid (MSA), formic acid, sea salts, and mineral grains. Ice below ≃3,500 m comprises refrozen water from Lake Vostok, accreted to the bottom of the glacial ice. Nutrients in the accretion ice include salts and dissolved organic carbon. There is great interest in searching for living microbes and especially for new species in deepest Antarctic ice. I propose a habitat consisting of interconnected liquid veins along three-grain boundaries in ice in which psychrophilic bacteria can move and obtain energy and carbon from ions in solution. In the accretion ice, with an age of a few 104 years and a temperature a few degrees below freezing, the carbon and energy sources in the veins can maintain significant numbers of cells per cubic centimeter that are metabolizing but not multiplying. In the 4 x 105-year-old colder glacial ice, at least 1 cell per cm3 in acid veins can be maintained. With fluorescence microscopy tuned to detect NADH in live organisms, motile bacteria could be detected by direct scanning of the veins in ice samples. |
| 语种 | 英语 |
| scopus关键词 | carbon; formic acid; ice; nitric acid; reduced nicotinamide adenine dinucleotide; sulfonic acid derivative; sulfuric acid; Antarctica; article; bacterium; energy; fluorescence microscopy; freezing; nonhuman; priority journal; Antarctic Regions; Bacterial Physiology; Carbon; Cold; Energy Metabolism; Geology; Ice; Ions; Models, Biological; Nitric Acid; Soil Microbiology; Specimen Handling; Sulfuric Acids; Water Microbiology; Bacteria (microorganisms) |
| 来源期刊 | Proceedings of the National Academy of Sciences of the United States of America
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/159210 |
| 作者单位 | Price, P.B., Physics Department, University of California, Berkeley, CA 94720, United States |
| 推荐引用方式 GB/T 7714 | Price P.B.. A habitat for psychrophiles in deep Antarctic ice[J],2000,97(3). |
| APA | Price P.B..(2000).A habitat for psychrophiles in deep Antarctic ice.Proceedings of the National Academy of Sciences of the United States of America,97(3). |
| MLA | Price P.B.."A habitat for psychrophiles in deep Antarctic ice".Proceedings of the National Academy of Sciences of the United States of America 97.3(2000). |
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