Figure 3

Growth curve of S. toebii with respect to GtoCFE concentration. One milliliter of anaerobically 12h-cultured S. toebii was inoculated and cultured at 60°C in 100 ml PEPN broth in a N₂ gas-flushed anoxic cultivation system with 0, 10, 20, 50 or 100 μg ml^-1 GtoCFE. The growth of S. toebii was monitored by measuring the optical density at 600 nm (A), concentration of nitrite produced (B) and cell counts (C). Asterisks, without GtoCFE (negative control); circles, 10 μg ml^-1GtoCFE; triangles, 20 μg/ml^-1; diamonds, 50 μg ml^-1; squares, 100 μg ml^-1.