Ecological study on Aeromonas hydrophila, strain F 588
1983
Prakittisin Sihanonth | Veravudh Mahamontri | Vanida Bodharamik (Chulalongkorn Univ., Bangkok (Thailand). Faculty of Science)
Effects of pH, temperature, sodium chloride and a herbicide, paraquat, at various concentrations on the growth of the bacteria Aeromonas hydrophila strain F 588 could grow in a wide range of pH where as the optimal pH for the cell growth was between pH 5 to 11.5. The growth of A. hydrophila F 588 decreased at the pH 5 or higher than 11.5, moreover, the cell growth was completely stopped at pH 4.0. Sodium chloride concentrations from 0 to 3 percent had no effect on the growth of this organism. The cell growth was severely inhibited when cultivated in a nutrient broth containing sodium chloride higher than 6 percent. The optimal temperature for the growth of A. hydrophila F 588 was at 30 deg. celsius. A. hydrophila F 588 could not grow at 8 deg. celsius. and 45 deg. celsius. The effects of paraquat at various concentrations on the growth of A. hydrophila F 588 showed no difference when the culture was incubated at 30 deg. celsius in the absence or in the present of light. Paraquat at the concentration levels from 0 to 10 ppm had no effect on the growth of this bacteria. However, the growth of bacteria decreased at the concentrations of paraquat higher than 10 ppm and completely stopped at 200 ppm. A. hydrophila F 588 could grow in the very wide range environmental conditions.
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