SUMMARY: Endospores of Frankland and Frankland strain R (which is able to grow under highly alkaline conditions) germinated at a higher pH value than spores of an alkali-sensitive strain, Mu-3055. Spores of Jordan strain Ru 38 (able to grow at pH 11·0) germinated at pH 11·0. Spore germination at any pH value was generally followed by outgrowth to the vegetative rod. Outgrowth of germinated spores of R at pH 10·0 and of those of Ru 38 at pH 11·0 took place at 30° but not at 37°. Growth from a vegetative inoculum of R at pH 10·0 or 10·3 took place more readily at 30° than at 37°. The ability of the vegetative forms of both bacterial species to grow under alkaline conditions was transmitted through the endospore.


Article metrics loading...

Loading full text...

Full text loading...



  1. Berger J. A., Marr A. G. 1960; Sonic disruption of spores of Bacillus cereus . J. gen. Microbiol 22:147
    [Google Scholar]
  2. Campbell L. L. 1957; Bacterial spore germination-definitions and methods of study. In Spores Halvorson H. O. Ed Amer. Inst. Biol. Sci., Wash. Publ 533
    [Google Scholar]
  3. Chislett M. E., Kushner D. J. 1961; A strain of Bacillus circulans capable of growing under highly alkaline conditions. J. gen. Microbiol 24:187
    [Google Scholar]
  4. Conklin M. E. 1934; Mercurochrome as a bacteriological stain. J. Bact 27:30
    [Google Scholar]
  5. Kushner D. J., Lisson T. A. 1959; Alkali resistance in a strain of Bacillus cereus pathogenic for the larch sawfly Pristiphora erichsonii . J. gen. Microbiol 21:96
    [Google Scholar]

Data & Media loading...

Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error