[Systematic relationships of podocarpales, cephalotaxales, and taxales based on comparative seed anatomy and biochemistry data].

The morphology of female reproductive organs and anatomy, ultrastructure, and ultrasculpture of seed integuments were studied in more than 150 species of Podocarpales, Cephalotaxales, and Taxales. The main trends of morphological-evolutionary transformations of female fructifications were established in three studied groups of gymnosperms. The taxonomic weight of structural features of the female reproductive organs of Podocarpales, Cephalotaxales, and Taxales was determined.

[Estimation of the relationship of the gymnosperms and angiosperms on the basis of the data obtained by biochemical methods].

The phylogenetic relationships of gymnospermous and angiospermous plants were studied. To this end, 13 antisera to seed proteins of plant taxa representing all the four classes of the gymnosperms were obtained. The antigens used in immunochemical reactions with these antisera included the proteins of 134 seed samples representing 91 families from all the 11 subclasses of dicotyledons and 64 seed samples representing 33 families from five out of six classes of monocotyledons (according to Takhtajan, 1996).

[Diagnostic implications of detecting antibodies to angiotensin-converting enzyme and its substrates].

The results of the analysis of diagnostic significance of examination of natural antibodies (Nab) to agiotensin-converting enzyme (ACE) and its substrates in the serum of hypertensive patients indicate that concentration of Nab to ACE differ from this mean concentration in donors. An elevated level of Nab to ACE may be considered as a compensatory reaction to increased content of the enzyme in vascular endothelium and blood flow. The same patients were examined for antibodies to peptide angiotensin II (AT-II).

[Application of the serological method for evaluation of relations between gymnosperms and dicotyledonous plants].

An attempt has been undertaken to evaluate interrelations of gymnospermous and dicotyledonous plants on the basis of immunochemical studies of seed proteins. For this purpose, 12 antisera were raised to proteins of taxa representing four gymnosperm classes: Ginkgoopsida, Cycadopsida, Coniferopsida, and Gnetopsida. Seed proteins of eight dicotyledonous subclasses (after Takhtadzhyan, 1987) were used.