FIG. 4.

Snow samples were melted and then incubated on R2A media at 4°C, 25°C, or 37°C and read after 28 days, 7 days, or 48 h, respectively. Cultures depicted here were from 28-day cultures incubated at 4°C from sample site A. Top row of R2A plates were from within the Okarian rover from sites A1 and A2. Bottom row of R2A plates were from snow samples from sites A3, A4, and A5 (see text and Fig. 3 for sampling details). Color images are available at www.liebertonline.com/ast.