Development of ultraviolet resistance in sporulating Bacillus cereus T.
Ultraviolet (UV) resistance patterns of sporulating Bacillus cereus were determined. Six different categories of UV resistance were discernible as the organism progressed from exponential growth to the free, mature spore. Light microscope observations allowed the assignment of certain sporulation stages to specific UV resistance categories. Marked changes in UV resistance were associated with stages III, mid-IV, and post-IV of sporulation. Dipicolinic acid was shown to sensitize forespores to UV radiation. Mechanisms invoked to explain the different UV categories are discussed.
D001409:Bacillus cereus / Q000378:metabolism / Q000528:radiation effects; D003470:Culture Media; D008853:Microscopy; D009154:Mutation; D010848:Picolinic Acids / Q000378:metabolism; D013171:Spores, Bacterial / Q000528:radiation effects; D013223:Statistics as Topic; D013997:Time Factors; D014466:Ultraviolet Rays
D003470:Culture Media; D010848:Picolinic Acids