EMS induced intercellular chromatin transmigration in Papaver somniferum L.
G. Kumar, S. Naseemhttps://doi.org/10.17221/85/2012-CJGPBCitation:Kumar G., Naseem S. (2013): EMS induced intercellular chromatin transmigration in Papaver somniferum L. Czech J. Genet. Plant Breed., 49: 86-89.
The phenomenon of chromatin migration was observed during microsporogenesis in an ethyl methane sulphonate (EMS) treated population of poppy, which is an important medicinal plant. Cytomixis occurred through a cytoplasmic channel or by direct fusion of pollen mother cells (PMCs); the former was more recurring than the latter. The process was associated with irregular meiosis. PMCs with differing chromosome numbers from the normal diploid number (2n = 22) through cytomixis may lead to the production of aneuploid and polyploid gametes. An increase in the concentration of EMS had a positive effect on the percentage of PMCs showing cytomixis. In addition to cytomixis, other chromosomal abnormalities were also found. Cytomixis along with the related chromosomal abnormalities largely affected the post-meiotic products resulting in some pollen sterility.Keywords:
cytomixis; ethyl methane sulphonate; microsporogenesis; pollen sterility; poppy