Effects of Bacitracin and Excess Mg^<2+> on Submerged Mycelial Growth of Streptomyces azureus
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概要
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Effects of bacitracin(BC)and excess Mg^<2+> on pellet formation and mycelial growth of Streptomyces azureus were studied in a liquid culture using Bennett medium. The addition of Mg^<2+> at concentrations above 0.2 mM to the medium resulted in the promotion of pellet formation, a distinct inhibition of growth and decrease in cell mass. BC changed the growth type of mycelia from the compact pellet-type to the dispersed-type, and stimulated mycelial growth after a long lag period, accompanied by an increase in cell mass. In the presence of less than 0.2 mM Mg^<2+> BC completely inhibited mycelial growth. Ca^<2+> showed an effect similar to Mg^<2+>. EDTA inhibited pellet formation, but never stimulated growth. Furthermore, EDTA suppressed the growth inhibitory and stimulatory actions of BC. From these results, we speculated that: (i)excess Mg^<2+> induced pellet formation; (ii)BC, similar to EDTA chelated with excess Mg^<2+> in the medium, leading to the inhibition of pellet formation; and(iii)BC-induced stimulation of growth might be due to its chelating and antimicrobial activities. It was also said that the growth inhibitory action of BC on S.azureus was antagonized by excess Mg^<2+> or Ca^<2+> and EDTA.
- 社団法人日本生物工学会の論文
- 1998-07-25
著者
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Ogata Seiya
Microbial Genetics Division, Institute of Genetic Resources,Kyushu University
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DOI KATSUMI
Microbial Genetics Division, Institute of Genetic Resources, Faculty of Agriculture, Kyushu Universi
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Doi Katsumi
Microbial Genetic Division Institute Of Genetic Resources Kyushu University
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Okba Adel
Microbial Genetics Division Institute Of Genetic Resources Faculty Of Agriculture Kyushu University
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Matsuo Shorin
Microbial Genetics Division Institute Of Genetic Resources Faculty Of Agriculture Kyushu University
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Ogata T
Kyushu Univ. Fukuoka Jpn
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Ogata Seiya
Microbial Genetic Division Institute Of Genetic Resources
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Matsubara Hitoshi
Microbial Genetics Division, Institute of Genetic Resources, Faculty of Agriculture, Kyushu Universi
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OGATA TAKAHIRO
Microbial Genetics Division, Institute of Genetic Resources, Faculty of Agriculture, Kyushu Universi
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Matsubara Hitoshi
Microbial Genetics Division Institute Of Genetic Resources Faculty Of Agriculture Kyushu University
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Doi Katsumi
Microbial Genetic Division Institute Of Genetic Resources Faculty Of Agriculture Kyushu University
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