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The genotoxic action of copper (Cu) on the polytene chromosomes of Chironomus riparius was investigated by analysing structural and functional chromosome aberrations of fourth instars larvae hatched from eggs subject to acute (48h) exposure with three environmentally relevant concentrations of aqueous Cu (0.005, 0.01, 0.05mg/l). A dose dependent relationship was observed between Cu concentration and...
A natural population of Chironomus riparius from the heavy metal-polluted Piedmont station (Italy) was analysed. Chromosome G, on which the Balbiani rings BRa, BRb and BRc are located, was very sensitive to the pollution. The BR system was considered to be an interesting model for studying the response of the genome to the heavy metal pollution. Together, with a standard activity of BRs (BRc>BRb),...
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