[Influence of low dozes of ionizing radiation on accumulation of melanin pigments and catalase and superoxidedismutase activities in Cladosporium cladosporioides].
Influence of low dozes of ionizing radiation on melanin pigments synthesis and activity of antioxidant enzymes catalase and superoxidedismutase of two strains of Cladosporium cladosporioides 4, (isolated from radioactive soil) and 396 (control) were investigated. It was shown, that in C. cladosporioides 4 under the exposure of ionizing radiation an increase of melanin synthesis in a stationary growth phase and increase of superoxidedismutase activity in a logarithmic phase were observed; in the control strain C. cladosporioides 396 activation of melanin synthesis and superoxide dismutase activity in both growth phases was revealed. It was established that in C. cladosporioides 4 the endocellular catalase activity in a logarithmic phase is 3.2 times higher, than in control strain. Under the action of ionizing radiation a 2-fold increase of this enzyme activity unlike the control strain in which the activity inhibition was revealed. The obtained results testify to the complex response of antioxidant systems and melanin to the action of low dozes of radiation which depends on the growth phase and presence of radioadaptation properties in the investigated fungi.
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D002374:Catalase / Q000378:metabolism*; D047852:Chernobyl Nuclear Accident; D002963:Cladosporium / Q000201:enzymology / Q000378:metabolism / Q000528:radiation effects*; D008543:Melanins / Q000378:metabolism*; D011829:Radiation Dosage; D011834:Radiation Monitoring; D011839:Radiation, Ionizing; D013482:Superoxide Dismutase / Q000378:metabolism*; D014455:Ukraine
D008543:Melanins; D002374:Catalase; D013482:Superoxide Dismutase