Systemic modification of tobacco mosaic virus in tobacco cultivars resistant to this virus in the presence of infection with cucumber mosaic virus, potato viruses X and Y

Stoimenova, E.; Yonchev, G.

Comptes Rendus de l' Academie Bulgare des Sciences 46(2): 111-113

1993


ISSN/ISBN: 1310-1331
Accession: 002508908

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Abstract
The plant material comprised 3 varieties of the Nevrokopska Basma (NB) type, a hybrid tobacco, and wild Nicotiana glutinosa, which was used to transfer to the varieties the gene N for hypersensitive resistance to tobacco mosaic tobamovirus (TMV). After inoculation with TMV before and after infection with cucumber mosaic cucumovirus (CMV), potato X potexvirus (PVX) and potato Y potyvirus (PVY), alone or in mixtures, a high proportion of plants of the varieties and wild species showed systemic infection with TMV despite carrying the N gene. The percentage of plants systemically infected with TMV depended on variety and mode of infection, and was lowest in the hybrid tobacco (which had the highest frequency of infected plants dying), followed by the wild species. Differences were significant between N. glutinosa infected with CMV or PVY and the varieties NB A24 and NB 1164 infected with PVX or PVY.