Genetical and Cytological Changes Induced by Cowdung in Tradescantia Clone O2

Abstract

The effects of high concentrations of cowdung in sand on cell division and gene mutations have been studied in Tradescantia clone O2. The frequency of somatic mutations induced in the staminal hairs has been found to increase with increase in the concentration of cowdung in the sand. Chromosome breakage resulting in deletion of large and small segments of chromosomes from the daughter nuclei and spindle abnormalities of various types were oberved in the treated plants. It is possible that mutations in the staminal hairs result from deletion of the dominant allele for flower colour. The possible role of decaying organic substances like compost, cowdung and oil cakes in the induction of spontaneous mutations in nature is also discussed.