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  • Title: Novel N gene-associated, temperature-independent resistance to the movement of tobacco mosaic virus vectors neutralized by a cucumber mosaic virus RNA1 transgene.
    Author: Canto T, Palukaitis P.
    Journal: J Virol; 2002 Dec; 76(24):12908-16. PubMed ID: 12438616.
    Abstract:
    The N gene conditions for resistance to Tobacco mosaic virus (TMV) but only below 28 degrees C. However, a TMV-based vector expressing green fluorescent protein (TMV-GFP) showed only limited movement at 33 degrees C in tobacco plants harboring the N gene and other genes cointrogressed from Nicotiana glutinosa. TMV-GFP moved efficiently in tobacco plants that either lacked these genes or that contained the N gene but were transgenic for RNA1 of Cucumber mosaic virus. These findings identified novel temperature-independent resistance to the movement of TMV-GFP which could be neutralized by a different viral transgene. Using the N gene and nahG gene-transgenic tobacco, we show that this novel resistance is manifested specifically by the N gene itself and operates via a pathway independent of salicylic acid.
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