Relationship of dipicolinic acid content in spores of Bacillus cereus T to ultraviolet and gamma radiation resistance.
نویسندگان
چکیده
Spores of Bacillus cereus T lacking dipicolinic acid showed a statistically significant reduction in resistance to ultraviolet and gamma radiation as compared with spores with high dipicolinic acid content.
منابع مشابه
Photoprotection by dipicolinate against inactivation of bacterial spores with ultraviolet light.
The resistance of three types of Bacillus cereus T spores to ultraviolet radiation corresponded to their dipicolinic acid (DPA) content. Photoprotection against ultraviolet light was observed in DPA-containing spores and in DPA-less spores irradiated through calcium dipicolinate.
متن کاملRegulation of dipicolinic acid biosynthesis in sporulating Bacillus cereus. Characterization of enzymic changes and analysis of mutants.
Some of the early enzymes in the lysine-biosynthetic pathway also function for dipicolinic acid synthesis in sporulating Bacillus cereus T. 1. The first enzyme, aspartokinase, loses its sensitivity to feedback inhibition by lysing. This change occurs before the time of dipicolinic acid synthesis but at a time when diaminopimelic acid is required for spore cortex formation. 2. A possible regulat...
متن کاملCalcium dipicolinic acid-induced germination of Bacillus cereus spores.
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 di...
متن کاملGermination properties of spores with low dipicolinic acid content.
Keynan, A. (University of Wisconsin, Madison), W. G. Murrell, and H. O. Halvorson. Germination properties of spores with low dipicolinic acid content. J. Bacteriol. 83:395-399. 1962.-When the dipicolinic acid content of spores of Bacillus cereus strain T is reduced from 7.5 to 2 or 3%, the spores germinate spontaneously after heat activation and are sluggish in their response to l-alanine and o...
متن کاملGrowth and Sporulation Characteristics of an Organic Sulfur-requiring Auxotroph of Bacillus Cereus.
Lundgren, D. G. (Syracuse University, Syracuse, N.Y.) and K. F. Bott. Growth and sporulation characteristics of an organic sulfur-requiring auxotroph of Bacillus cereus. J. Bacteriol. 86:462-472. 1963.-This paper reports investigations of several aspects of growth and sporulation of an organic sulfur-requiring auxotroph of Bacillus cereus ATCC 4342. The wild type and B. cereus T were also studi...
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عنوان ژورنال:
- Journal of bacteriology
دوره 103 2 شماره
صفحات -
تاریخ انتشار 1970