{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T10:06:00Z","timestamp":1789725960468,"version":"4.0.1"},"reference-count":40,"publisher":"SAGE Publications","issue":"10","license":[{"start":{"date-parts":[[2023,9,6]],"date-time":"2023-09-06T00:00:00Z","timestamp":1693958400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Astrobiology"],"published-print":{"date-parts":[[2023,10]]},"abstract":"<jats:p>\n                    Since the Viking Labeled Release experiments were carried out on Mars in the 1970s, it has been evident that the martian surface regolith has a strong oxidizing capacity that can convert organic compounds into CO\n                    <jats:sub>2<\/jats:sub>\n                    and probably water. While H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    was suggested originally for being the oxidizing agent responsible for the outcome of the Viking experiments, recent analyses of the martian regolith by the Phoenix lander and by consecutive missions point toward radiation-mediated decomposition products of perchlorate salts as the primary oxidant. In a series of experiments, we have shown that abrasion and triboelectric charging of basalt by simulated saltation could be an additional way of activating regolith. We have also shown that abraded basalt with a chemical composition close to that of martian regolith is toxic to several bacterial species and thus may affect the habitability of the martian surface. In the present study, we investigated the effect of the quantitatively most important minerals (olivine, augite, and plagioclase) and iron oxides (hematite, magnetite, and maghemite) on the survival of bacterial cells to elucidate whether a specific mineral that constitutes basalt is responsible for our observations. We observed that suspensions of iron-containing minerals olivine and augite in phosphate-buffered saline (1\u2009\u00d7\u2009PBS) significantly reduce the number of surviving cells of our model organism\n                    <jats:italic toggle=\"yes\">Pseudomonas putida<\/jats:italic>\n                    after 24\u2009h of incubation. In contrast, the iron-free mineral plagioclase showed no effect. We also observed that suspending abraded olivine and augite in 1\u2009\u00d7\u2009PBS led to a dramatic increase in pH compared to the pH of 1\u2009\u00d7\u2009PBS alone. The sudden increase in pH caused by the presence of these minerals may partly explain the observed cytotoxicity. The cytotoxic effect of augite could be relieved when a strong buffer (20\u2009\u00d7\u2009PBS) was used. In contrast, olivine, despite the stronger buffer, maintained its cytotoxicity. Iron oxides\n                    <jats:italic toggle=\"yes\">per se<\/jats:italic>\n                    have no negative effect on the survival of our test organism. Overall, our experiments confirm the cytotoxicity of basalt and show that no single constituent mineral of the basalt can account for its toxicity. We could show that abraded iron-containing minerals (olivine and augite) change the pH of water when brought into suspension and thereby could affect the habitability of martian regolith.\n                  <\/jats:p>","DOI":"10.1089\/ast.2023.0015","type":"journal-article","created":{"date-parts":[[2023,9,6]],"date-time":"2023-09-06T14:11:26Z","timestamp":1694009486000},"page":"1090-1098","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Investigation of the Cytotoxicity of Mars-Relevant Minerals upon Abrasion"],"prefix":"10.1177","volume":"23","author":[{"given":"Martin Kobek-Kjeldager","family":"Sigvartss\u00f8n","sequence":"first","affiliation":[{"name":"Department of Biology, Microbiology section, Aarhus University, Aarhus C, Denmark."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ebbe Norskov","family":"Bak","sequence":"additional","affiliation":[{"name":"Department of Biology, Microbiology section, Aarhus University, Aarhus C, Denmark."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Per","family":"N\u00f8rnberg","sequence":"additional","affiliation":[{"name":"Department of Biology, Microbiology section, Aarhus University, Aarhus C, Denmark."},{"name":"Department of Geoscience, Aarhus University, Aarhus C, Denmark."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Svend J. Knak","family":"Jensen","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Aarhus University, Aarhus C, Denmark."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jan","family":"Th\u00f8gersen","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Aarhus University, Aarhus C, Denmark."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mikkel","family":"Begnh\u00f8j","sequence":"additional","affiliation":[{"name":"Department of Biology, Microbiology section, Aarhus University, Aarhus C, Denmark."},{"name":"Department of Chemistry, Aarhus University, Aarhus C, Denmark."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kai","family":"Finster","sequence":"additional","affiliation":[{"name":"Department of Biology, Microbiology section, Aarhus University, Aarhus C, Denmark."},{"name":"Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Aarhus C, Denmark."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2023,9,6]]},"reference":[{"key":"e_1_3_4_2_1","doi-asserted-by":"publisher","DOI":"10.1017\/S1473550408004126"},{"key":"e_1_3_4_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.epsl.2017.06.008"},{"key":"e_1_3_4_4_1","doi-asserted-by":"publisher","DOI":"10.3389\/fmicb.2017.01709"},{"key":"e_1_3_4_5_1","doi-asserted-by":"publisher","DOI":"10.1089\/ast.2018.1856"},{"key":"e_1_3_4_6_1","doi-asserted-by":"publisher","DOI":"10.1017\/S1473550421000392"},{"key":"e_1_3_4_7_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1238932"},{"key":"e_1_3_4_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.pss.2006.05.039"},{"key":"e_1_3_4_9_1","doi-asserted-by":"publisher","DOI":"10.1017\/CBO9780511536076.010"},{"key":"e_1_3_4_10_1","doi-asserted-by":"publisher","DOI":"10.1017\/S1473550415000385"},{"key":"e_1_3_4_11_1","doi-asserted-by":"publisher","DOI":"10.1089\/ast.2006.6.451"},{"key":"e_1_3_4_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.icarus.2008.01.022"},{"key":"e_1_3_4_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.pss.2011.03.019"},{"key":"e_1_3_4_14_1","doi-asserted-by":"publisher","DOI":"10.1186\/1475-2859-10-25"},{"key":"e_1_3_4_15_1","doi-asserted-by":"publisher","DOI":"10.1029\/2019JE006072"},{"key":"e_1_3_4_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/s0891-5849(03)00149-7"},{"key":"e_1_3_4_17_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja01130a007"},{"key":"e_1_3_4_18_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12989-022-00486-7"},{"key":"e_1_3_4_19_1","doi-asserted-by":"publisher","DOI":"10.1098\/rspa.1934.0221"},{"key":"e_1_3_4_20_1","doi-asserted-by":"publisher","DOI":"10.1017\/S1473550405002557"},{"key":"e_1_3_4_21_1","doi-asserted-by":"publisher","DOI":"10.1089\/ast.2008.0244"},{"key":"e_1_3_4_22_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1172466"},{"key":"e_1_3_4_23_1","doi-asserted-by":"publisher","DOI":"10.1029\/2018GH000175"},{"key":"e_1_3_4_24_1","doi-asserted-by":"publisher","DOI":"10.1089\/ast.2022.0065"},{"key":"e_1_3_4_25_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.epsl.2007.07.032"},{"key":"e_1_3_4_26_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.epsl.2006.12.004"},{"key":"e_1_3_4_27_1","doi-asserted-by":"publisher","DOI":"10.1029\/2006JE002679"},{"key":"e_1_3_4_28_1","first-page":"58","article-title":"Viking Biological Experiments","volume":"173","author":"Klein HP","year":"1977","unstructured":"Klein HP. 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