FIG. 5.

(A) Relationship between growth rate and NaCl concentration in the medium for isolate M6. (B) Survival of isolate M6 at various salinities. Symbols: ▴, distilled water (0% salt); ○, 1% NaCl; •, 2% NaCl; ▵, 3% NaCl; ▪, 4% NaCl; □, 5% NaCl; ♦, 15% NaCl. (C) Sulfide production by isolate M6 when inoculated into an anaerobic medium (12% NaCl) either supplemented with elemental sulfur (□), containing elemental sulfur but no substrate (yeast extract) (▵), or without elemental sulfur (○). An uninoculated medium with elemental sulfur but no microorganisms produced no detectable sulfide. All values shown are averages from duplicate tubes.