SUMMARY. The formation of bean seeds in plants systemically infected with common bean mosaic virus is accompanied by the intense deposition of callose and lignin in nucellar, integumental, mikopillyar areas as well as in tissue barriers thus preventing the spread of viruses. The tissue degradation of ovules with the development of the typical hypersensitivity reaction occurs in case of high virus particles concentration in plants. The diffuse granular viral inclusions were detected іn the cytoplasm and nucleus of developing embryo cells. Ways of virus transport were determined by structural features of the vascular system or the ovule tissues and localization of viral inclusions in the tissues during seed formation.
Keywords: common bean, ovule, integument, nucellus, embryo, cuticle, Bean common mosaic virus, viral inclusions
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