Dipicolinic acid location in intact spores of Bacillus megaterium.
نویسندگان
چکیده
Beta-attenuation analysis of intact spores of Bacillus megaterium containing tritium-labeled dipicolinic acid has shown that dipicolinic acid is located in the spore protoplast and not in the cortex.
منابع مشابه
Mechanism of killing of spores of Bacillus cereus and Bacillus megaterium by wet heat.
AIMS To determine the mechanism of wet heat killing of spores of Bacillus cereus and Bacillus megaterium. METHODS AND RESULTS Bacillus cereus and B. megaterium spores wet heat-killed 82-99% gave two bands on equilibrium density gradient centrifugation. The lighter band was absent from spores that were not heat-treated and increased in intensity upon increased heating times. These spores lacke...
متن کاملInduced release of dipicolinic acid from spores of Bacillus megaterium.
Conditions under which dipicolinic acid may be released from bacterial spores probably relate to the chemical state of the dipicolinic acid in the spore, to its physical location in the spore, and to its influence on the physiological properties of the spore. The latter aspect embraces the relation between release of dipicolinic acid and the viability of the spore, its heat resistance, and its ...
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The discovery and certain aspects of the biosynthesis of dipicolinic acid (pyridine-2,6-dicarboxylic acid) in exudates of germinated spores and in intact spores of aerobic bacilli have been recently reported (Powell, 1953; Perry and Foster, 1955). In the latter paper it was noted that maximum recovery of dipicolinic acid from intact spores necessitated an initial treatment with hot dilute inorg...
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The initiation of germination of Bacillus megaterium QM B1551 spores, grown in supplemented nutrient broth, has been studied. The initiation properties depend on buffer concentrations and the particular batch of spores. Initiation in l-alanine, KBr, calcium dipicolinate, or in buffer alone increases as a function of the spore age; whereas initiation in glucose, l-leucine, or l-proline remains r...
متن کاملRed pigment in Bacillus megaterium spores.
Bacillus megaterium QM B1551 spores contained a unique red pigment in their membranes that was not found in other species. This red pigment, presumably a carotenoid, was synthesized about the time of dipicolinic acid synthesis during sporulation and was associated with the forespores. A yellow pigment was synthesized during sporulation in rich medium and was found in the mother cell compartment...
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عنوان ژورنال:
- Journal of bacteriology
دوره 114 1 شماره
صفحات -
تاریخ انتشار 1973