Isolation and Characterization of Forespores from <i>Bacillus megaterium</i>
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- WATABE Kazuhito
- Department of Environmental Health Sciences, Faculty of Pharmaceutical Sciences, Setsunan University
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- KOSHIKAWA Tomihiko
- Department of Environmental Health Sciences, Faculty of Pharmaceutical Sciences, Setsunan University
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- YAMAZOE Mari
- Department of Environmental Health Sciences, Faculty of Pharmaceutical Sciences, Setsunan University
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- OGAWA Setsuko
- Department of Environmental Health Sciences, Faculty of Pharmaceutical Sciences, Setsunan University
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- TORII Mitsuo
- Department of Environmental Health Sciences, Faculty of Pharmaceutical Sciences, Setsunan University
抄録
A procedure for isolation of intact forespores from sporulating Bacillus megaterium cells was developed. The cells were digested with lysozyme and made to release free forespores from the protoplasts by disruption of the cytoplasmic membrane with sonication in phosphate buffer containing 10% glycerol. The suitability of the procedure was confirmed by recovery of dipicolinic acid in the isolated forespores and an electron microscopic observation. The fine structure of the forespores prepared at 6hr (t6) after initiation of sporulation was similar to that of mature spores, except that the cortex layer and primordial cell wall were thinner and the core was larger. The density, determined by density gradient centrifugation, of the forespores isolated at t6, t10, t12, and mature spores was estimated to be 1.2783, 1.2875, 1.2861, and 1.2858, respectively. The isolated forespores at t6 and t8 were extremely heat labile (D80 of 9.5 and 21.5min, respectively) relative to mature spores (D80 of 277.8 min). These forespores were also less resistant to organic solvents. Germination of the forespores as well as mature spores was induced by KNO3, D-glucose, and L-leucine. Forespores at t6 were more sensitive to KNO3-induced germination than those at t10, t12, and mature spores when measured by reduction in the optical density of cell suspension.
収録刊行物
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- MICROBIOLOGY and IMMUNOLOGY
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MICROBIOLOGY and IMMUNOLOGY 31 (2), 101-111, 1987
Center For Academic Publications Japan
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詳細情報 詳細情報について
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- CRID
- 1572543027964672640
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- NII論文ID
- 130003483317
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- ISSN
- 03855600
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- 本文言語コード
- en
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- データソース種別
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- CiNii Articles