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  • Title: Reduction of tobacco mosaic virus accumulation in transgenic plants producing non-functional viral transport proteins.
    Author: Malyshenko SI, Kondakova OA, Nazarova JuV, Kaplan IB, Taliansky ME, Atabekov JG.
    Journal: J Gen Virol; 1993 Jun; 74 ( Pt 6)():1149-56. PubMed ID: 8509764.
    Abstract:
    Transgenic plants producing the 30K temperature-sensitive transport protein (TP) of tobacco mosaic virus (TMV) mutant Ni2519 (affecting cell-to-cell transport) were found to: (i) be susceptible to wild-type TMV U1 at 24 degrees C (a permissive temperature for Ni2519 TP), (ii) acquire a certain level of resistance to TMV U1 accumulation when maintained at 33 degrees C (a non-permissive temperature for Ni2519 TP) and (iii) lose the resistance to wild-type TMV after their transfer from 33 degrees C to 24 degrees C. It is suggested that reversible temperature-dependent conformational changes in Ni2519 TP are responsible for these phenomena and that production of a TP which is only partially functional in transgenic plants confers on these plants a resistance to the virus owing to reduction of the level of cell-to-cell transport. Transgenic tobacco plants producing the 32K TP of brome mosaic virus (BMV) acquired resistance to TMV U1 suggesting that BMV TP is partially functional in tobacco plants.
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