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Evidence for the physical integrity of flavescence doree phytoplasmas purified by immunoaffinity from infected plants or leafhoppers and the plant pathogenicity of phytoplasmas from leafhoppers


Evidence for the physical integrity of flavescence doree phytoplasmas purified by immunoaffinity from infected plants or leafhoppers and the plant pathogenicity of phytoplasmas from leafhoppers



Plant Pathology 44(6): 971-978



ISSN/ISBN: 0032-0862

Phytoplasmas were extracted from flavescence doree-infected broadbean (Vicia faba) using a vacuole isolation medium, and were immunoaffinity purified from infected leafhoppers. Purified phytoplasmas from both host sources were immunolabelled and observed under the electron microscope. The infectivity of the purified phytoplasmas from leafhoppers was checked by injecting healthy leafhoppers which were then allowed to feed on healthy V. faba seedlings. The appearance of typical symptoms in these plants, and the positive results obtained in ELISA with extracts of some of the injected leafhoppers and with symptomatic V. faba, indicated that the purified phytoplasmas had retained their infectivity and had multiplied in the injected leafhoppers which had become infective. These results support a previous report that phytoplasmas purified by immunoaffinity chromatography are well preserved.

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Accession: 002835824

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