Studies on Salt Fish.: IX. Effect of Environment upon Growth of Red Halophilic Bacteria

Growth of 25 strains of red halophiles stopped below 15° and above 55°; heat resistance is less than two minutes at 98 °C. in 24 per cent saline. Range of relative humidity necessary for growth lies between 70 and 85 per cent. They have high resistance to ultra-violet light, surviving 120 minutes' exposure. Range of salt tolerance can be increased in both directions by gradual adaptation. Replacement of the Na ion by other cations inhibits growth.