Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/112946
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dc.titleThe suppressor of transgene RNA silencing encoded by Cucumber mosaic virus interferes with salicylic acid-mediated virus resistance
dc.contributor.authorJi, L.-H.
dc.contributor.authorDing, S.-W.
dc.date.accessioned2014-11-28T08:12:33Z
dc.date.available2014-11-28T08:12:33Z
dc.date.issued2001-06
dc.identifier.citationJi, L.-H.,Ding, S.-W. (2001-06). The suppressor of transgene RNA silencing encoded by Cucumber mosaic virus interferes with salicylic acid-mediated virus resistance. Molecular Plant-Microbe Interactions 14 (6) : 715-724. ScholarBank@NUS Repository.
dc.identifier.issn08940282
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/112946
dc.description.abstractThe Cucumber mosaic virus (CMV)-encoded 2b protein (Cmv2b) is a nuclear protein that suppresses transgene RNA silencing in Nicotiana benthamiana. Cmv2b is an important virulence determinant but nonessential for systemic spread in N. glutinosa, in contrast to its indispensable role for systemic infections in cucumber. Here, we report that Cmv2b became essential for systemic infections in older N. glutinosa plants or in young seedlings pretreated with salicylic acid (SA). Expression of Cmv2b from the genome of either CMV or Tobacco mosaic virus significantly reduced the inhibitory effect of SA on virus accumulation in inoculated leaves and systemic leaves. A close correlation is demonstrated between Cmv2b expression and a reduced SA-dependent induction of the alternative oxidase gene, a component of the recently proposed SA-regulated antiviral defense. These results collectively reveal a novel activity of Cmv2b in the inhibition of SA-mediated virus resistance. We used a N. tabacum line expressing a bacterial nahG transgene that degrades SA to provide evidence for a Cmv2b-sensitive antiviral defense mechanism in tobacco in which SA acts as a positive modifier but not as an essential component. We propose that SA induces virus resistance by potentiating a RNA-silencing antiviral defense that is targeted by Cmv2b.
dc.sourceScopus
dc.subjectDisease resistance
dc.subjectPathogenesis-related proteins
dc.subjectPosttranscriptional gene silencing
dc.subjectSystemic acquired resistance
dc.typeArticle
dc.contributor.departmentINSTITUTE OF MOLECULAR AGROBIOLOGY
dc.description.sourcetitleMolecular Plant-Microbe Interactions
dc.description.volume14
dc.description.issue6
dc.description.page715-724
dc.description.codenMPMIE
dc.identifier.isiutNOT_IN_WOS
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