1887

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Volume 69, Issue 8

The Subcellular Location of the Gene 1 Product of Cauliflower Mosaic Virus Is Consistent with a Function Associated with Virus Spread Free

Abstract

Summary

Using immunogold cytochemistry, plasmodesmata have been identified as subcellular locations of the protein product (P1) of cauliflower mosaic virus gene 1 in infected turnip tissue. Thin sections, from tissue adjacent to chlorotic local lesions on systemically infected fully expanded leaves, were probed with antiserum to a protein product derived from a -gene 1 fusion, and with control sera. Modified plasmodesmata between infected mesophyll cells, and plasmodesmata in the end walls of phloem parenchyma cells were specifically labelled with anti-P1 serum. In the former case, the position of the label suggested that P1 was extracellular and had formed a structural component of the modified plasmodesmata. Cell walls at the corners of cells in both healthy and infected tissue were also labelled. Anti-P1 serum also reacted with nuclei and the leaf cuticle, in both healthy and infected tissue. These observations provide strong circumstantial evidence that P1 is involved in the cell-to-cell movement of cauliflower mosaic virus.

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Keyword(s): CaMV , plasmodesmata and virus spread
© Society for General Microbiology 1988
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1988-08-01
2023-03-28
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The Subcellular Location of the Gene 1 Product of Cauliflower Mosaic Virus Is Consistent with a Function Associated with Virus Spread
J. Gen. Virol. 69, 1809 (1988); https://doi.org/10.1099/0022-1317-69-8-1809
/content/journal/jgv/10.1099/0022-1317-69-8-1809
/content/journal/jgv/10.1099/0022-1317-69-8-1809
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