Endopolyploidy in organs of Trifolium pratense L.in different ontogenetic stages
2014
Straková, Nikola | Kocová, Valéria | Kolarčik, Vladislav | Mártonfi, Pavol
Endopolyploidy is a common feature in seed plants. This phenomenon occurs during early development. Flow cytometry of 54 individuals of the species Trifolium pratense variety Manuela , in the vegetative organs during four ontogenetic stages is described. Fresh plant material grown from seeds was used for the analysis. The calculation made on the basis of the mean cycle value revealed that the level of endopolyploidy is different in various organs during the ontogeny. The highest endopolyploidy was recorded in the cotyledons of the first stage (1.0) and the lowest in the third leaf of the fourth ontogenetic stage (0.18). It was noticed that the degree of endopolyploidy decreased during the ontogeny in most of the plants and thus the ontogenetically oldest organs had higher endopolyploidy than the younger ones.
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