Abstract

The cellular damage, in Allium cepa root meristem, induced by the leaf extract of Ricinus communis was investigated. Total percentage of abnormalities increased correspondingly with increasing concentrations of the extract from 0.5% to 3% with complete arrest of mitosis at 4% of the extract. The major abnormalities were heavy pycnosis, clumping of chromosomes, chromosome fragmentation, lagging, unequal segregation at anaphase, chromosomebridge, spindle arrest resulting in the scattering of chromosomes, disintegration of nuclear and chromatin materials, nuclear budding and multinucleation. The abnormalities were discussed in detail.

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