Effet de la température d'incubation sur la composition lipidique de Corynébacteriacées du genre Arthrobacter

Abstract

Lipid composition of 3 Arthrobacter strains (mesophilic, psychrotrophic and psychrophilic strains) grown at their optimum growth temperature was studied. Great differences appeared only in the nature of their fatty acids; the psychrophilic strain synthesized less linear acids, C17 acids and more iso isomers than the other 2 strains. Incubation of the 3 strains at temperatures below their optimum resulted in variations only in proportion of the different fatty acids: increase of the ratio of unsaturated, of branched and of short-chain fatty acids. The relation between lipid composition and ability to grow at temperatures around 0.degree. C is discussed.