Abstract
Summary The effect of some copper phthalocyanine derivatives on sister chromatid exchanges (SCEs) in meristematic cells of Allium cepa roots was studied. A significant increase in SCEs frequencies was observed when BrdU-substituted chromosomes were subjected to the cationic phthalocyanines Alcian blue 8GS, Astra blue and Cuprolinic blue for 3 hours at the end of the G 1 period of the second division cycle. Among the anionic phthalocyanine compounds, only Luxol fast blue MBSN increases the SCEs over the control baseline.
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