Study on Morphology and Radiation Resistance of Deinococcus 007T

Abstract:

Studies were carried out to characterize and compare the morphology, cultivation and radiation resistance of 007^T to type strain AS1.633 as well as the known radiation resistant organism Deinococcus radiodurans R1. To determine the levels of radio resistance, culture of bacteria 007^T by comparing with cultures of bacteria AS1.633 and E. coli DH5α as well as the known radiation resistant and radiation sensitive organisms Deinococcus radiodurans R1 and Escherichia coli, respectively, were irradiated at the desired doses of UV and ⁶⁰Co gamma radiation. Results showed some difference of the morphology and cultivation characteristics of AS1.633 and 007^T. The colonies of AS1.633 were orange-red and smooth, whereas the colonies of 007^T were bright red and usually dry with pleats. Strain 007^T showed strongly resistant to UV and ⁶⁰Co gamma radiation compared to the radiation resistant organism D. radiodurans R1 and the radiation sensitive organism E.coli DH5α, 4% survival after exposition to UV-doses as high as 624Jm^-2 and 6% survival after radiated by 16kGy,respectively.