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ISHS Acta Horticulturae 308: XV International Symposium on Small Fruit Virus Diseases

CYTOPLASMIC INCLUSIONS IN LEAVES OF CHENOPODIUM QUINOA WILLD. INFECTED WITH THE STRAWBERRY MOTTLE AGENT

Authors:   J. Polák, M. Jokeš
Abstract:
The infectious agent of strawberry mottle disease occurs at the highest concentration in young immature apical leaves of Chenopodium quinoa plants 10 days after inoculation. Such systemically infected shoots showing symptoms of mosaic and mottling were used to prepare ultrathin sections for electron microscopy. Small inclusions of irregular shape, containing very small isometric virus-like particles c. 12–13 nm in diameter, were observed in the cytoplasm of leaf parenchyma. Such particles, arranged in paracrystalline arrays, were also found in some plastids. No such paracrystalline inclusions were found in preparations from healthy plants of C. quinoa.
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