VIEW ARTICLE

Cytology and Histology

Electron Microscopic Examination of Tomato Roots Coinfected with Glomus sp. and Tobacco Mosaic Virus. S. H. Jabaji-Hare, Graduate research assistant, Dept. of Biology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1; L. W. Stobbs, assistant professor, Dept. of Biology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1, Present address: Agriculture Canada, Vineland Research Station, Vineland Station, Ontario, Canada, L0R 2E0. Phytopathology 74:277-279. Accepted for publication 12 September 1983. Copyright 1984 Department of Agriculture, Government of Canada. DOI: 10.1094/Phyto-74-277.

Electron microscopic examination of tomato roots infected with tobacco mosaic virus demonstrated increased virus titers when roots also were infected with Glomus sp. While dense aggregates of virus were found in the cytoplasm of cortical cells, there was no evidence of adsorption or acquisition of virus particles by arbuscular structures. Virus was also absent in all hyphae examined. Transmission of TMV could not be demonstrated through mycorrhizal associations with the roots.