Vladimir Konstantinovich Shumny

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The frequency characteristics and cytological picture of cytomixis in the course of male meiosis are described in transgenic tobacco plants (Nicotiana tabacum L.) with altered flower morphology and male sterility. Effects of cytomixis on qualitative composition of meiotic products are studied (formation of cytoplasts and polyads). Doubling of the chromosome(More)
Electron-microscopic analysis of cytomictic channels formation in the pollen mother cells in tobacco at the stage of meiosis prophase I of anthers has been conducted. The cytomictic channels in the pollen mother cells in tobacco have been established to be formed under the basis of both single plasmodesmata and de novo with the involvement of specific(More)
According to the scanning model, 40S ribosomal subunits initiate translation at the first (5′ proximal) AUG codon they encounter. However, if the first AUG is in a suboptimal context, it may not be recognized, and translation can then initiate at downstream AUG(s). In this way, a single RNA can produce several variant products. Earlier experiments suggested(More)
Based on the cross (Triticum aestivum L. × Secale cereale L.) × T. aestivum L., wheat-rye substitution lines (2n = 42) were produced with karyotypes containing, instead of a pair of homologous wheat chromosomes, a homeologous pair of rye chromosomes. The chromosome composition of these lines was described by GISH and C-banding methods, and SSR analysis. The(More)
In haploid and diploid organisms of the plant kingdom, meiotic division of diploid cells proceeds in two consecutive stages, with DNA replicating only once. In amphihaploids (interspecific or intergeneric hybrids), where homologs are absent, the reduction of the chromosome number does not occur, meiosis is abnormal, and the plants are sterile. Gamete(More)
Transgenic tobacco plants (Nicotiana tabacum cv. SR1) expressing extracellular pancreatic ribonuclease from Bos taurus and characterized by an increased level of ribonuclease activity in leaf extracts were challenged with tobacco mosaic virus. The transgenic plants exhibited a significantly higher level of protection against the virus infection than the(More)
The antisense suppressor was constructed for proline dehydrogenase gene (PDH; a fragment of PDH from Arabidopsis in antisense orientation and under the control of 35S promoter of cauliflower mosaic virus, CMV). In Nicotiana tabacum SR1 tobacco transformants bearing antisense suppressor for PDH, the proline content and the cytoplasm osmotic pressure were(More)
We studied the stress resistance of genetically modified (GM) tobacco plants bearing an antisense suppressor of the gene for proline dehydrogenase. Such plants are characterized by elevated proline content. The progeny of the transgenic plants were shown to have elevated salt tolerance.
Meiosis in wide F1 hybrids in the tribe Triticeae is complex and irregular. Despite extensive research, the meiotic pathways in such hybrids remain largely unknown. In this study, the effect of the genotypes of disomic wheat–rye substitution lines on the regulation of meiosis in ABDR amphihaploids was analysed by comparing microsporogenesis and seed set(More)
The Far East population of Chinese silver grass (Miscanthus sinensis Anderss.) was introduced in western Siberia. A variety with an altered root system structure and long shoots with leader buds was isolated. This variety rapidly colonizes soil-forming continuous and even cover without tussocks. The yield of dry biomass, containing about 40% high quality(More)