Shepelevych V. Pathogenesis and induced resistance of Solanaceae plants infected with tomato spotted wilt virus

The dissertation is dedicated to investigation of pathogenesis and induced resistance in systemic TSWV-infection plants. It was investigated biological and physical characteristics some of the TSWV isolates, which can be found on the tobacco plants of foothills and southern coast of the Crimea; as well as macro- and microsymptoms introduced with this virus in tobacco and D. stramonium plants. It is found that mostly weak TSWV isolate produces mosaic symptoms on affected leaves and virus-specific changes in cells, whereas strong TSWV isolate leads to severe symptoms of destructed tissue, virus-specific and remarkable pathologic changes in structure of cytoplasm and cell organellas. The author has firstly shown that system TSWV infection is capable to call nonspecific local and systemic resistance of tobacco and D. stramonium plants to unrelated tobacco mosaic virus (TMV), as well as that strong and weak- TSWV isolates are interfered in plants. It was found protective effect of the yeast mannan appliedindividually and in combination with some anti-metabolites against TSWV infection. It was recognized that systemic necrotic TSVW infection in tobacco plants causes remarkable quantity changes in protein-hydrogen metabolism. It is observed generation of PR-proteins, antiviral proteins and concanavalin А specific glycobiopolymer, which can be the indicators of the nonspecific and induced resistance of plants. The author interprets TSWV infection of the tobacco plants as similar to TMV- induced reaction in hypersensitive plants.