Abstract
The cytogenetic activity of chiral nitrosoalkilureas and their effect on winter soft wheat chromosomes (Triticum aestivum L.) have been investigated. A comparative analysis of the cytogenetic activity of the chiral nitrosoalkilureas—S(+)1-N-nitroso-1-N-methyl-3-N-sec-buthylurea (S(+)NMsBU) and R(−)-1-N-nitroso-1-N-methyl-3-N-sec-buthylurea (R(−)NMsBU)—on higher plants has been performed for the first time. According to the frequency of chromosome aberrations, stereoisomers S(+) are twice more active than stereoisomers R(−). In addition to the typical anaphase aberrations (fragments, bridges, and lagging chromosomes), other numerous mitosis pathologies have been found: C-mitosis, chromosome hyperspiralization and despiralization, unequal chromosome allocation between daughter nuclei, three-pole mitosis, etc. Such pathologies have not been found when treating with nitrosoethylurea and gamma rays.
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Original Russian Text © V.V. Morgun, E.A. Larchenko, R.G. Kostyanovskiy, A.M. Katerynchuk, 2011, published in Tsitologiya i Genetika, 2011, Vol. 45, No. 4, pp. 36–43.
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Morgun, V.V., Larchenko, E.A., Kostyanovskiy, R.G. et al. Chiral mutagens: Cytogenetic effects on higher plants. Cytol. Genet. 45, 231–239 (2011). https://doi.org/10.3103/S0095452711040074
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DOI: https://doi.org/10.3103/S0095452711040074