Immunocapture (IC) RT-PCR assays were developed for detection of tomato (ToMV) and tobacco mosaic (TMV) tobamoviruses in spruce and pine extracts. When purified viruses were diluted in root or needle extracts of virus-free conifer seedlings, both IC-RT-PCR assays detected their respective target viruses at concentrations of 10-100 fg ml(-1). This compared to ELISA detection sensitivities of 1 ng ml(-1). Primers were designed from regions of high sequence diversity. Specificity of all primer pairs was confirmed by sequencing of PCR products. PCR distinguished more reliably between the two viruses than ELISA. Moreover, a multiplex IC-RT-PCR assay for the simultaneous detection and differentiation of TMV and ToMV was developed. When root extracts were seeded with both viruses simultaneously, the multiplex assay detected each virus at concentrations of 1-10 pg ml(-1). Six TMV and 18 ToMV isolates from various hosts, water samples and a soil sample were amplified and differentiated by multiplex IC-RT-PCR. No amplifications were observed against pepper mild mottle and ribgrass mosaic tobamoviruses and against six viruses belonging to other taxonomic groups.
Development of a multiplex immunocapture RT-PCR assay for detection and differentiation of tomato and tobacco mosaic tobamoviruses.
Volker Jacobi,G. Bachand,Richard C. Hamelin,J. D. Castello
Published 1998 in Journal of Virological Methods
ABSTRACT
PUBLICATION RECORD
- Publication year
1998
- Venue
Journal of Virological Methods
- Publication date
1998-10-01
- Fields of study
Biology, Medicine, Environmental Science
- Identifiers
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- Source metadata
Semantic Scholar, PubMed
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