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J Bacteriol. 1962 January; 83(1): 100-105
Copyright © 1962, The Williams & Wilkins Company. All Rights Reserved.

CALCIUM DIPICOLINIC ACID-INDUCED GERMINATION OF BACILLUS CEREUS SPORES

^a Department of Bacteriology, University of Wisconsin, Madison, Wisconsin

ABSTRACT

KEYNAN, A. (University of Wisconsin, Madison) AND H. O. HALVORSON. Calcium dipicolinic acid-induced germination of Bacillus cereus spores. J. Bacteriol. 83:100–105. 1962.—The germination of spores of Bacillus cereus strain T can be initiated by calcium dipicolinic acid. The kinetics of germination are characterized by a long lag period followed by a rapid loss of refractility. The lag period displays the temperature dependence of a metabolic reaction, whereas the rate of germination is relatively independent of temperature. Germination induced by calcium dipicolinic acid is insensitive to L-alanine analogues, is sensitive to metabolic poisons, and proceeds without a detectable activation stage. It was concluded that calcium dipicolinic acid-induced germination has a metabolic basis and differs, at least in its initial phases, from L-alanine-induced germination.

¹ Present address: Israeli Institute for Biological Research, Ness-Ziona, Israel.

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