Olivine-Respiring Bacteria Isolated from the Rock-Ice Interface in a Lava-Tube Cave, a Mars Analogue Environment

Popa, Radu; Smith, Amy; Popa, Rodica; Boone, Jane; Fisk, Martin R.

Citeable URL: https://ir.library.oregonstate.edu/concern/articles/2b88qd896

Original submission is Author's original manuscript. Version of Record was added April 13, 2012. This is a copy of an article published in the Astrobiology © 2012 copyright Mary Ann Liebert, Inc.; Astrobiology is available online at: http://online.liebertpub.com.

NEWS COVERAGE: A news release based on this journal publication, which is written for a lay audience and has been approved by an author of the study, is available online: http://bit.ly/s73CeD.

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Attribute Name	Values
Creator	Popa, Radu Smith, Amy Popa, Rodica Boone, Jane Fisk, Martin R.
Abstract	The boundary between ice and basalt on Earth is an analog for some near-surface environments of Mars. We investigated neutrophilic iron-oxidizing microorganisms from the basalt-ice interface in a lava tube from the Oregon Cascades with perennial ice. One of the isolates (Pseudomonas sp. HerB) can use ferrous iron Fe(II) from the igneous mineral olivine as an electron donor and O₂ as an electron acceptor. The optimum growth temperature is ~12-14°C, but growth also occurs at 5°C. Bicarbonate is a facultative source of carbon. Growth of Pseudomonas sp. HerB as a chemolithotrophic iron oxidizer with olivine as the source of energy is favored in low O₂ conditions (e.g., 1.6 % O₂). Most likely, microbial oxidation of olivine near pH 7 requires low O₂ to offset the abiotic oxidation of iron. The metabolic capabilities of this bacterium would allow it to live in near-surface, icy, volcanic environments of Mars in the present or recent geological past, and make this type of physiology a prime candidate in the search for life on Mars.
Resource Type	Article
DOI	https://doi.org/10.1089/ast.2011.0639
Date Available	2011-11-08T23:39:43+00:00
Date Issued	2011
Citation	Popa, R., Smith, A., Rodica, P., Boone, J., & Fisk, M. (2011). Olivine-Respiring Bacteria Isolated from the Rock-Ice Interface in a Lava-Tube Cave, a Mars Analogue Environment. Astrobiology.
Journal Title	Astrobiology
Journal Volume	12
Journal Issue/Number	1
Academic Affiliation	College of Oceanic and Atmospheric Sciences
Keyword	Mars Olivine Extremophiles Redox Iron-Oxidizing Bacteria
Rights Statement	Copyright Not Evaluated
Funding Statement (additional comments about funding)	Funding for this research was provided by NASA Astrobiology grant NNX08AO22G NCE and The Cave Research Foundation.
Publisher	Mary Ann Liebert, Inc.
Peer Reviewed	Yes
Language	English [eng]
Replaces	http://hdl.handle.net/1957/25386
Additional Information	description.provenance : Approved for entry into archive by Sue Kunda(sue.kunda@oregonstate.edu) on 2011-11-08T23:39:43Z (GMT) No. of bitstreams: 1 FiskMartin.OlivineRespiring Bacteria.pdf: 1512954 bytes, checksum: b62eee9cbe8dedfd96dfeb65afb0a913 (MD5) description.provenance : Made available in DSpace on 2011-11-08T23:39:43Z (GMT). No. of bitstreams: 1 FiskMartin.OlivineRespiring Bacteria.pdf: 1512954 bytes, checksum: b62eee9cbe8dedfd96dfeb65afb0a913 (MD5) Previous issue date: 2011 description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2011-11-08T21:42:14Z No. of bitstreams: 1 FiskMartin.OlivineRespiring Bacteria.pdf: 1512954 bytes, checksum: b62eee9cbe8dedfd96dfeb65afb0a913 (MD5)

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