Isolation and characterization of oxygen sensitive mutants of Azotobacter vinelandii

Abstract

Thirteen new types of oxygen-sensitive mutants were isolated from Azotobacter vinelandii, without any selection on carbon sources. Three of these showed decreased respiratory or catalase activity, and the other ten, the same level of activity as the parent strain. The oxygen protection mechanism appears due not only to the respiratory activity but may also involve catalase or another, yet unknown, factor(s). © 1991.