[Not Available].

Types of aerenchyma formation in adventive roots of wild plant S. latifolium L. are described for the first time.

[Structural and cytochemical aspects of Brassica rapa embryogenesis under conditions of clinorotation].

The results of study of embryo development in B. rapa plants, as well as the rate and the character of nutrient substances accumulation in their cells under slow horizontal clinorotation and laboratory control are presented. Significant similarity of the peculiarities of embryo differentiation and character of nutrient substance accumulation in both variants was shown.

[Localization of callose in microspores and pollen grains of Sium latifolium plants under different water regimes].

Results of study of callose content and its topography in mother cells of microspores, microspores and pollen grains in terrestrial and air-aquatic S. latifolium plants growing under different water regimes are presented. The increased content of callose in the microspore walls at tetrad stage and pollen grains is revealed on the basis of fluorescence intensity and quantitative luminescent analysis of terrestrial S.

Peculiarities [correction of Pfculiarities] of lipid accumulation in Brassica rapa L. embryos on different stages development under altered gravity.

Accumulation of lipid inclusions in Brassica rapa embryos generated under slow horizontal clinorotation and in the laboratory control were analyzed by histochemical methods. The research of lipid accumulation was carried out on consecutive stages of the embryo development, from the moment of two-cellular proembryo formation up to the stages of their full differentiation (21-22-day-old embryos). Accumulation of lipid drops was revealed for the first time at early stages of embryogenesis in this species, beginning from 3-day-old embryos (ball-like stage of embryo development) under clinorotation and in the laboratory control.

[Response of the glutathione system to chronic irradiation of human population after the Chernobyl accident].

A complex relationship between plasma glutathione level in human population (children living in radionuclide-contaminated regions and the Chernobyl liquidators) exposed to chronic low-level radiation after the Chernobyl accident was demonstrated. The obtained experimental data indicate different responses of the human glutathione system to low (from 0.1 to 20 cSv) and high (from 20 to 150 cSv) doses of ionizing radiation.