Bacterial recovery from ancient glacial ice
Article first published online: 25 APR 2003
Volume 5, Issue 5, pages 433–436, May 2003
How to Cite
Christner, B. C., Mosley-Thompson, E., Thompson, L. G. and Reeve, J. N. (2003), Bacterial recovery from ancient glacial ice. Environmental Microbiology, 5: 433–436. doi: 10.1046/j.1462-2920.2003.00422.x
- Issue published online: 25 APR 2003
- Article first published online: 25 APR 2003
- Received 6 May, 2002; revised 10 July, 2002; accepted 10 July, 2002.
Ice that forms the bottom 18 m of a 308 m ice core drilled from the Guliya ice cap on the Qinghan-Tibetan plateau in Western China is over 750 000 years old and is the oldest glacial ice known to date. Fourteen bacterial isolates have been recovered from samples of this ice from ∼296 m below the surface (mbs). Based on 16S rDNA sequences, these are members of the α- and β-proteobacterial, actinobacterial and low-G + C Gram-positive bacterial lineages. 16S rDNA molecules have also been amplified directly, cloned and sequenced from the ice-core melt water. These originated from Pseudomonas and Acinetobacterγ-proteobacterial species. These results demonstrate that bacteria can be recovered from water ice that has frozen for time periods relevant to biological survival through terrestrial ice ages or during interplanetary transport.