The Rate of Growth of Salmonella typhimurium with Individual Carbon Sources Related to Glucose Metabolism or to the Krebs Cycle

Abstract

Salmonella typhimurium was grown in a number of media containing compounds related either to the tricarboxylic acid (Krebs) cycle or to glucose metabolism. Organisms grown on compounds related to the Krebs cycle are pink when looked at by reflected light, whereas those grown on compounds related to glucose are white. Organisms growing in media containing compounds from one group continue to grow when transferred to media containing another compound of the same group, but not when transferred to media containing a compound from the other group. Growth of organisms in a mixture of one compound from each group leads to the formation of white organisms, i. e. the glucose-like state appears to predominate.