Sánchez, F. J.Mateo Martí, E.Raggio Quílez, JoséMeeßen, J.Martínez Frías, J.García Sancho, LeopoldoOtt, S.Torre, R. De La2024-01-162024-01-162012-11Sánchez, F.J., Mateo-Martí, E., Raggio, J., Meeßen, J., Martínez-Frías, J., Sancho, L.G., Ott, S. & de la Torre, R. (2012). The resistance of the lichen Circinariagyrosa (nom. provis.) towards simulated Mars conditions−a model test for the survival capacity of a eukaryotic extremophile. Planet Space Sci. 72(1), 102–1100032-063310.1016/j.pss.2012.08.005https://hdl.handle.net/20.500.14352/93419The “Planetary Atmospheres and Surfaces Chamber” (PASC, at Centro de Astrobiología, INTA, Madrid) is able to simulate the atmosphere and surface temperature of most of the solar system planets. PASC is especially appropriate to study irradiation induced changes of geological, chemical, and biological samples under a wide range of controlled atmospheric and temperature conditions. Therefore, PASC is a valid method to test the resistance potential of extremophile organisms under diverse harsh conditions and thus assess the habitability of extraterrestrial environments. In the present study, we have investigated the resistance of a symbiotic organism under simulated Mars conditions, exemplified with the lichen Circinaria gyrosa—an extremophilic eukaryote. After 120 hours of exposure to simulated but representative Mars atmosphere, temperature, pressure and UV conditions; an unaltered photosynthetic performance demonstrated high resistance of the lichen photobiont.engjournal article1873-5088https://doi.org/10.1016/j.pss.2012.08.005restricted access581.4Planetary Atmospheres and Surface ChamberMarsLichenSymbiosisSurvivalResistance potentialFisiología vegetal (Biología)2417 Biología Vegetal (Botánica)