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Repair of gamma irradiation induced single stranded dna breaks in a physarum polycephalum myxomycete


Doklady Akademii Nauk Ukrainskoi SSR Seriya B Geologicheskie Khimicheskie i Biologicheskie Nauki (11): 62-65
Repair of gamma irradiation induced single stranded dna breaks in a physarum polycephalum myxomycete
The technique of sedimentation in an alkaline sucrose gradient and analysis of specific radioactivity for DNA subnuclear fractions were used to study the repair of gamma-radiation-induced single-stranded breaks (ssb) of DNA in Physarum polycephalum myxomycete at different stages of mitotic cycle was studied. After irradiation in a dose of 1 kGy in the middle of G2-phase DNA ssb are completely repaired during 2 h of postirradiation incubation. Irradiation of plasmodium in the S-phase is not accompanied by a complete repair of DNA ssb. After irradiation in the G2-phase repair of DNA ssb are mainly initiated and proceed with a higher rate on DNA sites associated with nuclear matrix.

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Accession: 006312407



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