Damages Caused by Irradiation in the Presence of NaCl in Macromolecular Components of E. coli |
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Authors: | Kazui Igarashi Akira Matsuyama |
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Institution: | The Institute of Physical and Chemical Research, Wako-shi, Saitama-ken 351, Japan |
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Abstract: | Damages in macromolecular components and in their functions of E. coli produced by gamma irradiation in the presence of higher concentration of NaCl were determined with reference to the basic mechanism for NaCl radiosensitization. As the results, inhibitions of DNA repair, of DNA degradation, of macromolecular syntheses and of RNA species formation were found in DNA repair proficient strains. The number of radiation-induced DNA-strand breaks was not increased by the presence of 1 m NaCl during irradiation. It was suggested that inhibition of DNA repair may be of primary importance among these lesions for NaCl radiosensitization. |
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Keywords: | quorum sensing N-acylhomoserine lactone exopolysaccharide Pantoea ananatis plant pathogen |
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