2004
DOI: 10.1007/s00425-004-1334-2
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The type-1 and type-2 ribosome-inactivating proteins from Iris confer transgenic tobacco plants local but not systemic protection against viruses

Abstract: The antiviral activity of the type-2 ribosome-inactivating protein (RIP) IRAb from Iris was analyzed by expressing IRAb in tobacco (Nicotiana tabacum L. cv. Samsun NN) plants and challenging the transgenic plants with tobacco mosaic virus (TMV). Although constitutive expression of IRAb resulted in an aberrant phenotype, the plants were fertile. Transgenic tobacco lines expressing IRAb showed a dose-dependent enhanced resistance against TMV infection but the level of protection was markedly lower than in plants… Show more

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Cited by 29 publications
(29 citation statements)
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“…Several lines of evidence support the idea that ricin-B related lectins play a role in plant defense against pathogens (Chen et al, 2002b; Vandenbussche et al, 2004a,b) and insects (Wei et al, 2004; Shahidi-Noghabi et al, 2009). Over-expressing SNA-I′ or SNA-V from S. nigra in transgenic tobacco (Samsun NN) plants enhances the tobacco plant’s resistance against infection with tobacco mosaic virus.…”
Section: Pathogen Recognition Based On Protein–carbohydrate Interactionsmentioning
confidence: 77%
See 1 more Smart Citation
“…Several lines of evidence support the idea that ricin-B related lectins play a role in plant defense against pathogens (Chen et al, 2002b; Vandenbussche et al, 2004a,b) and insects (Wei et al, 2004; Shahidi-Noghabi et al, 2009). Over-expressing SNA-I′ or SNA-V from S. nigra in transgenic tobacco (Samsun NN) plants enhances the tobacco plant’s resistance against infection with tobacco mosaic virus.…”
Section: Pathogen Recognition Based On Protein–carbohydrate Interactionsmentioning
confidence: 77%
“…Over-expressing SNA-I′ or SNA-V from S. nigra in transgenic tobacco (Samsun NN) plants enhances the tobacco plant’s resistance against infection with tobacco mosaic virus. Though the antiviral effect is clearly related to the amount of protein expressed it cannot be related to an increased expression of pathogenesis-related proteins (Chen et al, 2002b; Vandenbussche et al, 2004a,b). Furthermore, no clear correlation was observed between in planta antiviral activity of the transgenic tobacco lines and the in vitro N -glycosidase activity of the proteins toward genomic RNA of the tobacco mosaic virus, suggesting that the in planta antiviral activity of these RIPs may rely on a direct interaction with the virus (Vandenbussche et al, 2004a).…”
Section: Pathogen Recognition Based On Protein–carbohydrate Interactionsmentioning
confidence: 99%
“…The toxicity of some ricin homologs from Abrus precatorius , Sambucus nigra and Viscum album has been confirmed but it should be mentioned that not all proteins are as toxic as ricin [68]. Expression analysis and overexpression of type-2 RIPs provide evidence that these proteins play a role in plant defense of the plant against pathogens (tobacco mosaic virus) and pest insects (caterpillars, aphids) [69,70,71,72,73]. …”
Section: Resultsmentioning
confidence: 99%
“…These antiviral activities possibly rely on the direct depurination of the viral genomic RNA, since the expression of SNA-V did not induce the synthesis of pathogenesis-related proteins. Similarly, the type 2 RIP from Iris showed antiviral activity to tobacco mosaic virus and tobacco etch virus, without alteration of gene expression for pathogenesis-related proteins (Vandenbussche et al 2004b;Desmyter et al 2003). …”
Section: Antiviral Activity Of Type 2 Ripsmentioning
confidence: 95%