Radiation-sensitivities and DNA homology of radiation-resistant Acinetobacter strains isolated from ingredient of animal feeds such as fish meals
2008
Ito, H.(Japan Atomic Energy Research Inst., Takasaki, Gunma. Takasaki Radiation Chemistry Research Establishment)
Seven typical strains belonging to genus Acinetobacter were isolated from fish meals and bone meals. Guanin + cytosine contents of DNA of these strains were ranged to be 41 to 45%. Many taxonomic characteristics of strains of F1, F14, F50, B4 and J5 were similar to A. radioresistens FO-1, and DNA homology values were obtained to be 71 to 92% compared with 100% of A. radioresistens FO-1. On the contrary, strains of J16 and J22 had similar characteristics with A. calcoaceticus ATCC23055 and also each DNA homology values were obtained to be 37% compared with A. radioresistens FO-1. Their Dsub(10) values of strains F1, F14, F50, B4 and J5 in gamma-rays under air-equilibrium were also obtained to be 0.60 to 1.70 kGy as similar radiation-resistance with 1.70 kGy of A. radioresistens FO-1. However, Dsub(10) values of J16 and J22 were obtained to be 0.35 kGy as similar to 0.12 kGy of A. calcoaceticus ATCC23055.
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