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[Induced resistance to kanamycin and tetracycline in Rhizobium japonicum].

Zlotnikov Km, Khmel'nitskiĭ Mi

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Abstract

Spontaneous mutants Km-R and Tc-R of R. japonicum with various levels of resistance to kanamycin (0.8-20 mg/ml) and tetracycline (130-210 micrograms/ml) were isolated. No cross resistance in the mutants was observed. Plasmid R68.45 transferred to the wild strains resistance to 210 micrograms/ml of tetracycline and to 20 mg/ml of kanamycin. This plasmid did not practically increase the resistance to tetracycline in mutants Tc-R. At the same time it markedly increased the resistance to kanamycin in mutants Km-R.

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What this paper is about

Spontaneous mutants Km-R and Tc-R of R. japonicum with various levels of resistance to kanamycin (0.8-20 mg/ml) and tetracycline (130-210 micrograms/ml) were isolated. No cross resistance in the mutants was observed. Plasmid R68.45 transferred to the wild strains resistance to 210 micrograms/ml of tetracycline and to 20 mg/ml of kanamycin. This plasmid did not practically increase the resistance to tetracycline in mutants Tc-R. At the same time it markedly increased the resistance to kanamycin in mutants Km-R.

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Available abstract

Spontaneous mutants Km-R and Tc-R of R. japonicum with various levels of resistance to kanamycin (0.8-20 mg/ml) and tetracycline (130-210 micrograms/ml) were isolated. No cross resistance in the mutants was observed. Plasmid R68.45 transferred to the wild strains resistance to 210 micrograms/ml of tetracycline and to 20 mg/ml of kanamycin. This plasmid did not practically increase the resistance to tetracycline in mutants Tc-R. At the same time it markedly increased the resistance to kanamycin in mutants Km-R.

Key concepts: Kanamycin, Tetracycline, Mutant, Plasmid, Microbiology, Chemistry, Biology, Antibiotics

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[Induced resistance to kanamycin and tetracycline in Rhizobium japonicum]. — Research Paper | ScholarLens