Abstract
The present paper deals with the gamma radiation and EMS induced chromosomal aberrations in Turnera ulmifolia Linn. Mitosis was found to be quite normal in control plants. As a result of the mutagenic treatment of seeds (gamma rays and EMS), chromosomal aberrations like stickiness, fragments, precocious movement of chromosomes, mitotic bridges and non-orientation of chromosomes were induced in the root tip cells. These irregularities were more at higher exposure of gamma rays and higher EMS concentrations for longer duration. The probable causes of the production of mitotic abnormalities following seed treatment with the mutagenic agents are discussed. The paper also includes effect of the physical and chemical mutagen on the cell division in the present plant.
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