title: [Effect of different factors on the germination of spores in S and P- variants of Bacillus brevis].
abstract: The effect of temperature, duration of heating and the presence of L-alanine and L-glutamine in the medium on the spore germination was studied with the S and P- variants of Bacillus brevis which did not contain gramicidin S and with the R and P+ varants obtained on a defined medium with beta-phenyl-beta-alanine, an inhibitor of the biosynthesis of gramicidin S. The experiments were carried out according to the scheme of complete factor experiment. Germination of the spores was found upon their incubation in a defined medium with L-alanine within two hours after their preliminary heating at 80 degrees C during 45 minutes (S variant), at 60 degrees C during 45 minutes (R variant+trace amounts of gramicidin S), at 80 degrees C during 15 minutes (P+ variant/trace amounts of gramicidin S). Germination of the spores of the P- variant was best upon heating to 60 degrees C during 45 minutes. Gramicidin S is presumed to inhibit, to a certain extent, germination of the spores of its producing culture.
mesh_terms: D000409:Alanine; D001407:Bacillus / Q000254:growth & development*; D003470:Culture Media; D005973:Glutamine; D006358:Hot Temperature; D013171:Spores, Bacterial / Q000254:growth & development
chemical_list: D003470:Culture Media; D005973:Glutamine; D000409:Alanine
vernacular_title: Vliianie razlichnykh faktorov na prorastanie spor u variantov S i P- Bacillus brevis