FIG. 6.

Viability of the photobiont of B. frigida as percentage of metabolically active cells by live/dead staining with FUN-1 after exposure to EVT-2 conditions (simulated space conditions on rock and simulated Mars conditions on P- and S-MRS). The experimental conditions are “control” (CO), exposure to polychromatic UVR_200–400nm for doses of 1.4, 14, 140, 450, and 680 MJ m⁻², and a transportation control (TC). Percentage given as mean value±standard deviation of n=5–15 thallus sections and 236–1178 cells counted.