[Chromosome aberrations in Crepis capillaris after gamma-irradiation and clinostatism]

The rate of cell division and emergence of spontaneous and radiation chromosomal aberrations in Crepis capillaris exposed to clinostating were determined. The plants were gamma-irradiated with 300 R during clinostating when the primary roots were 1-2 mm long. The velocity of clinostat rotation was 2 rpm. The mitotic index was not affected either by clinostating alone or combined with irradiation. The exposure to clinostating did not change significantly the total frequency of nuclear aberrations or the distribution of the aberrations of the chromosomal and chromatin type as well as aberrations resulting from one or two radiation events. Thus, the effect of clinostating combined with gamma-irradiation can be considered zero.