No 3 (2012)

The paper considers the possibility of disease-free crop in the practice of agriculture. Focuses on the problem points in the development of technologies of mass clonal micropropagation. On the example of the Russian Peoples' Friendship University demonstrated the benefit of a biotechnological laboratory for the development of innovative science, modern educational process and implementation of intensive technology.

Amaranthus paniculatus f. cruentus (Cherry jam) were grown in the phytotron on Johnson nutrient solution with 2 mM Fe3+-EDTA. Six weeks plants were treated with NiCl2. In the presence of 100 and 200 uM NiCl2 uptake of Fe in mature and especially young leaves sharply inhibited. Possible mechanisms of Ni and Fe competition and the role of this phenomenon in determining the level of phytoremediation potential of amaranthus plants are discussed.

The data that we obtained by different isolates of Tobamovirus (TMV, ToMV), circulating from the tested hybrids in glasshouse, indicate the presence of different types of them, which is consistent with published data on the composition of the field virus isolates. Studying isolates with symptoms on tomatoes and additional test plants, suggests the existence of at least four strains of Tomato mosaic virus, and one - Tobacco mosaic virus. Lambsquarters Chenopodium album, two varieties of pepper Capsicum annuum - "Spirit", "Podarok Moldovi" and two varieties of tobacco - "Gersegovina trebine" and "Dubek" were found out susceptible to isolate T3.

The results of research on the effect of drip irrigation regimes and doses of mineral fertilizers on water consumption and yield of onions cultivated on alluvial soils of southern Nepal are presented in this work. It was established that with an increase in the preirrigation threshold moisture level of soil and mineral fertilizers increased crop yield of onions.

The reproductive characteristics of crucian carp producers, the growth of hybrids and pure types in the embryonic and postembryonic period have been studied. The valuation of crucian carp has been done, that allowed them to be attributed to the first class. It was found that some differences on the exterior were observed on the volume of ejaculate, and on the working absolute fecundity of crucian carp. These indicators were higher in silver crucian carp than gold crucian carp. Breeding performance had great influence on the development of the young crucian carp types. Hybrid young crucian carp fry had higher weight than pure types of crucian carp that live in ponds with different feeding conditions.

In this study, qualitative indicators of the eggs in their ozonization with the definition of the amino acid composition, fatty acid composition and determination of their biological value.