VIEW ARTICLE

Cytology and Histology

Ultrastructure of Cell-Wall Thickenings and Paramural Bodies Induced by Barley Stripe Mosaic Virus. C. R. McMullen, Departments of Botany-Biology, Plant Science, and Botany-Biology, South Dakota State University, Brookings, South Dakota 57006; W. S. Gardner(2), and G. A. Myers(3). (2)(3)Departments of Botany-Biology, Plant Science, and Botany-Biology, South Dakota State University, Brookings, South Dakota 57006. Phytopathology 67:462-467. Accepted for publication 1 November 1976. Copyright © 1977 The American Phytopathological Society, 3340 Pilot Knob Road, St. Paul, MN 55121. All rights reserved.. DOI: 10.1094/Phyto-67-462.

Examination of ultrathin sections of young barley leaf tissues systemically infected with the ND18 strain of barley stripe mosaic virus (BSMV) revealed many paramural bodies and associated cell-wall thickenings. Occurring along with paramural bodies and cell-wall thickenings were bulbous-shaped “extended plasmodesmata” and extraprotoplasmic sacs, which appeared to have a close association with, and in some cases terminations of, plasmodesmata. Nonmembrane bound, intra- and extraprotoplasmic osmiophilic bodies were observed in mesophyll cells from leaves infected with the virus.