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        The development of a recombinant antibody to Polymyxa betae and its use in resistance screening

        Author
        Mutasa-Gottgens, Euphemia
        Chwarszczynska, D. M.
        Kingsnorth, Crawford S.
        Halsey, K.
        Asher, M. J. C.
        Attention
        2299/15175
        Abstract
        Antibodies to the obligate sugar-beet root parasite Polymyxa betae have been produced using a novel approach that selects for fungal gene sequences encoding proteins that are highly expressed in planta during infection. Recombinant fusion proteins expressed from these sequences in vitro were then used as immunogens to raise antibodies in animals. This approach resulted in the production of precisely targeted antibodies that specifically cross-reacted with P. betae in sugar-beet roots without the need for further purification. Subsequent tests also showed cross reactions with the closely related Polymyxa graminis in barley roots and Plasmodiophora brassicae in cabbage roots. In all cases, there was no interaction with proteins from host plants, or from other microorganisms commonly found in association with sugar-beet, barley or cabbage roots. Western blot analysis was used to differentiate inbred P. betaeresistant and susceptible hybrid sugar-beet lines inoculated in a standard glasshouse test. An ELISA-based detection system for P. betae is now being developed for routine high throughput screening of resistant germplasm
        Publication date
        2000
        Published in
        Procs 4th Symposium of the Int Working Group on Plant Viruses with Fungal Vectors
        Other links
        http://hdl.handle.net/2299/15175
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