[Effect of dissolved oxygen concentration on the growth of Pseudomonas]

The effect of concentration of oxygen dissolved in the medium (O2) on growth was studied with Pseudomonas herbicola, Ps. non-liquefaciens, Ps. aeruginosa, and Ps. desmolytica. Growth of all studied Pseudomonas cultures was decelerated when (O2) fell beyond 30-50% of saturation of the medium with oxygen; (O2) critical for respiration was within the range of 11-17% saturation, i. e. was 2-3 times lower that for growth. A decrease in the specific growth rate was usually accompanied with a decrease of the economic coefficient.