[Meiosis passing age dependence in Solanum linnaeum L. x solanum incanum L. F1 interspecific hybrid].

Meiosis passing in the first- and second-year-plants of F1 interspecific hybrid Solanum linnaeum L. x Solanum incanum L. has been carried out.

[Process of meiosis in interspecific hybrid F1 Lycopersicon esculentum Mill. x Lycopersicon chilense Dun].

The investigation concerns meiosis behaviour in embryo-culture-obtained Lycopersicon esculentum Mill. (mutant seedline Mo 638) x L. chilense Dun.

[Chiasma frequencies in the meiocytes of anther diametrical sections in Capsicum species].

Investigations concerning chiasma frequencies in meiocytes of three anther zones (free end, middle, base) in the cultivated and wild species of Capsicum genus have been carried out. It is revealed that maximum indices of total chiasma frequency were observed in the anther free end in comparison with its middle part and base. The conclusion is drawn that regularities of distribution of recombination indices are the result of the anther anatomy structure.

Chromatin structure and the state of human organism.

The state of chromatin in human buccal epithelium cell nuclei upon the influence of sport trainings was investigated. Chromatin state was evaluated in interphase buccal cell nuclei after orcein staining. The heterochromatin granule quantity (HGQ) was estimated in 30 nuclei per sample, and for every donor the mean HGQ value per 30 cells was determined.

[Changes in the function of the nucleus and chromatin of human cells under the action of hormonal factors in vitro].

The influence of hormones--adrenaline, noradrenaline, hydrocortisone on the electronegativity of cell nuclei (ENN) was shown by the method of intracellular microelectrophoresis. Changes in heterochromatin state were estimated on the basis of heterochromatin granules (chromocenters) quantity. Adrenaline and noradrenaline induced the decrease in ENN, the maximum effect was revealed with hormones concentration observed in human blood during physical training.