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Sažetak
Oksidacijski stres je poznat kao narušena ravnoteža između antioksidacijskog mehanizma zaštite i proizvodnje reaktivnih kisikovih vrsta, što može negativno utjecati na normalne biološke i metaboličke procese u živim organizmima, kao na primjer kod topola. U cilju opstanka, aerobni organizmi su stekli mehanizme antioksidacijske zaštite, gdje su od enzimskih najistraženije aktivnosti antioksidativnih enzima kao što su katalaze, peroksidaze, glutation peroksidaze i superoksid dismutaza. Fitoremedijacija je obećavajuća biotehnička metoda čišćenja zagađenih tala raznim onečišćujućim tvarima poput: teških kovina, organskih kontaminanata, pesticida i dr. Do danas, topole su pokazale potencijal za regeneraciju onečišćenih tala tijekom fitoremedijacijskog procesa.
Biokemijsko profiliranje statusa oksidacijskog stresa u drvenastim biljkama nije često istraživana u Srbiji i stoga je cilj ovoga pokusa bio ispitati utjecaj različitih koncentracija tri jona teških kovina, Ni3+, Cu2+ i Cd2+ na razinu oksidacijskog stresa tri klona, dvije različite vrste topole (Populus euramericana-M1; PE 19/66 i B-229 oba Populus deltoides vrsta). Biokemijski parametri za određivanje razine oksidacijskog stresa su: lipidna peroksi­dacija (LPx), test redukcijske snage željeza (FRAP), superoksid dismutaze (SOD) aktivnost i sadržina topivih