Interactions of Viruses in Plants

Kassanis, B.

doi:10.1016/s0065-3527(08)60700-9

Cited by 73 publications

(17 citation statements)

References 72 publications

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“…There have been numerous reports of mixed infection of two viruses (6,13,16). In some cases, mixed infections lead to synergistic interaction (14). Our field observations and limited greenhouse data (S. Jensen, unpublished data) indicate this may be the case with WSMV and HPV in wheat.…”

Section: Discussionmentioning

confidence: 58%

Mixed Infection of Hard Red Winter Wheat with High Plains Virus and Wheat Streak Mosaic Virus from Wheat Curl Mites in Nebraska

1998

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A new disease of wheat and corn caused by the High Plains virus (HPV) has been observed in the High Plains region of western United States. HPV is transmitted by the wheat curl mite, Aceria tosichella, which is also the vector of wheat streak mosaic virus (WSMV). In the field it is extremely difficult to visually differentiate plants infected with WSMV from those with HPV. An indirect protein-A sandwich enzyme-linked immunosorbent assay (PAS-ELISA) and Western blot analysis were used to identify WSMV and HPV. Samples of wheat curl mites were collected from arbitrarily chosen sites from commercial wheat plantings in 1995 and 1996 and used to infest caged wheat plants. After 3 weeks, leaf samples were harvested and assayed. Both Western blot analysis and PAS-ELISA were effective at identifying samples positive for WSMV and HPV, both alone and in mixed infections. Western blot results showed that over the 2 years, 65% of the samples were positive for WSMV, 46% were positive for HPV, and mixed infections were found in 40% of the samples. HPV presence was verified with similar results from field collected plant samples. These levels of virus indicate an unexpectedly high incidence of HPV in wheat curl mite populations in Nebraska.

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Section: Discussionmentioning

confidence: 58%

Mixed Infection of Hard Red Winter Wheat with High Plains Virus and Wheat Streak Mosaic Virus from Wheat Curl Mites in Nebraska

1998

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“…It is known that certain plant viruses can interact with each other synergistically leading to enhanced virulence (28). However, as double infection with CMV and TAV induced no synergistic response, the interaction we observed represents a new type of virus synergism; namely, one plant virus can interact synergistically with a protein derived from a second virus and encoded in cis even though no virus synergy occurs in double infections.…”

Section: Discussionmentioning

confidence: 68%

An interspecies hybrid RNA virus is significantly more virulent than either parental virus.

Ding

Shi

et al. 1996

Proc. Natl. Acad. Sci. U.S.A.

104

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Cucumber mosaic cucumovirus (CMV) infects a very wide range of plant species (>1000 species). We recently demonstrated that a previously undescribed gene (2b) encoded by RNA 2 of the tripartite RNA genome of CMV is required for systemic virus spread and disease induction in its hosts. Herein we report that when this CMV gene is replaced by its homologue from tomato aspermy cucumovirus (TAV), the resultant hybrid virus is significantly more virulent, induces earlier onset of systemic symptoms, and accumulates to a higher level in seven host species from three families than either of the parents. Our results indicate that CMV and the TAV 2b protein interact synergistically despite the fact that no synergism occurs in double infections with the two parental viruses. To our knowledge, this is the first example of an interspecific hybrid made from plant or animal RNA viruses that is more efficient in systemic infection ofa number of hosts than the naturally occurring parents. As CMV and the hybrid virus accumulated to a similar level in the infected tobacco protoplasts, the observed synergistic responses most likely resulted from an increased efficacy of the hybrid virus in systemic spread in host plants provided by the TAV 2b protein.The relevance of our finding to the application of pathogenderived resistance is discussed.

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“…STERK AND C. P. DE JAGER Interference between mixedly inoculated viruses (both related and unrelated) has been reported by many authors (for review, see Kassanis, 1963). In some instances the host plant used was immune or resistant to the interfering virus (e.g.…”

Section: Inhibition Of Cpsmv By Separate Components Of Cpmvmentioning

confidence: 99%

Interference between Cowpea Mosaic Virus and Cowpea Severe Mosaic Virus in a Cowpea Host Immune to Cowpea Mosaic Virus

Sterk

Jager

1987

Journal of General Virology

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SUMMARYInfection of a cowpea line by cowpea severe mosaic virus (CPSMV) was inhibited by cowpea mosaic virus (CPMV) even though the plants were immune to CPMV. The inhibition was dose-dependent and was complete if CPMV was added to the inoculum in a 50-fold excess over CPSMV. Isolated CPMV RNA inhibited infection by CPSMV or by isolated CPSMV RNA. CPMV particles devoid of RNA (top component), u.v.-inactivated but intact CPMV particles or u.v.-inactivated CPMV RNA did not inhibit infection by CPSMV. Bottom component particles of CPMV, but not middle component particles, inhibited CPSMV to the same extent as unfractionated CPMV. These findings strongly suggest that the interference is not due to competition between the particles or the RNAs of the two viruses for infectible sites. It may be that CPMV infects cells of the 'immune' host subliminally and that the inhibition is associated with replication of at least bottom component RNA of CPMV.

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Interactions of Viruses in Plants

Cited by 73 publications

References 72 publications

Mixed Infection of Hard Red Winter Wheat with High Plains Virus and Wheat Streak Mosaic Virus from Wheat Curl Mites in Nebraska

Mixed Infection of Hard Red Winter Wheat with High Plains Virus and Wheat Streak Mosaic Virus from Wheat Curl Mites in Nebraska

An interspecies hybrid RNA virus is significantly more virulent than either parental virus.

Interference between Cowpea Mosaic Virus and Cowpea Severe Mosaic Virus in a Cowpea Host Immune to Cowpea Mosaic Virus

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