Induction of Mitotic Abnormalities in Certain Genera of Tribe Vicieae by Paradichlorobenzene

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Abstract
Effect of paradichlorobenzene (PDB) on somatic chromosomes of Vicia faba, V. narbonensis, V. hirsuta, Pisum arvense and Lathyrus sativus was studied after prolonged treatment. Various mitotic anomalies were found. These included shortening and thickening of chromosomes, precocious separation of chromatids, tetraploid cells, binucleate cells, chromosome bridges and chromosome breakage. The potentiality of PDB as a mutagenic substance is emphasized, and terms like PDB-treatment, PDB-mitosis and PDB-metaphase are suggested for convenient use. Chromosome breaks generally took place at the heterochromatic regions.

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