Abstract
Two organic (ethyl mercuric chloride and mixture of ethyl mercuric chloride and phenyl mercuric acetate) and an inorganic (mercuric chloride) fungicides were tested on Allium cepa root tips. Different chromosomal aberrations were noted. Chromatid exchanges, breaks, ring chromosomes etc. showed strong mutagenic potentialities of these chemicals. Presence of polyploid cells indicated the role of fungicides in inhibiting spindle system. Binucleate cells appeared in low concentrations after long period of treatment indicating the action of the chemicals on the membrane system. These chemicals proved to be potential for causing genetic hazards in the biological system thereby justifying their banning in agriculture.
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