Premium
Properties of Hg‐ and Cd‐Spores of Bacillus megaterium QM B1551
Author(s) -
Imagawa Masayoshi,
Ichikawa Tomio,
Kondo Masaomi
Publication year - 1982
Publication title -
microbiology and immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.664
H-Index - 70
eISSN - 1348-0421
pISSN - 0385-5600
DOI - 10.1111/j.1348-0421.1982.tb00170.x
Subject(s) - biology , spore , microbiology and biotechnology , food science
Hg‐ and Cd‐spores of Bacillus megaterium QM B1551 were produced in Schaeffer's medium containing mercuric chloride and cadmium chloride respectively. Metals were added to the medium at 9 hr of incubation (Stage V) to give a final concentration of 50 μ m. It was found by electron microscopic and biochemical studies that the coats of both Hg‐ and Cd‐spores were thinner than those of control spores. Of the total Hg and Cd in the spores, 77% of the Hg and 63% of the Cd were detected in the spore coats. Hg‐ and Cd‐spores were less resistant to heat and more sensitive to germinants than control spores. Other properties of Hg‐ and Cd‐spores were similar to those of control spores. These results suggest that the spore coat has some relationship to the heat resistance and germinability of spores.