Gamma rays and ethyl methanesulfonate induced mitotic abnormalities in turnera ulmifolia var angustifolia
Tarar, J.L.; Dnyansagar, V.R.
Cytologia 48(3): 459-466
ISSN/ISBN: 0011-4545 Accession: 005502246
Gamma radiation and EMS [ethyl methanesulfonate] induced chromosomal aberrations in T. ulmifolia Linn. were studied. Mitosis was 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 long duration. The probable causes of the production of mitotic abnormalities following seed treatment with the mutagenic agents are discussed. The effect of the physical and chemical mutagen on the cell division was discussed.