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Pak-Choy as natural host of turnip yellow mosaic virus in Hungary / Pak-Choy als neuer natürlicher Wirt des turnip yellow mosaic virus in Ungarn

J. Horváth, D. Mamula and N. Juretić
Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz / Journal of Plant Diseases and Protection
Vol. 94, No. 3 (Juni 1987), pp. 308-313
Published by: Verlag Eugen Ulmer KG
Stable URL: http://www.jstor.org/stable/43383249
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Pak-Choy as natural host of turnip yellow mosaic virus in Hungary / Pak-Choy als neuer natürlicher Wirt des turnip yellow mosaic virus in Ungarn
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Abstract

Turnip yellow mosaic virus (TYMV) was found to naturally infect Pak-Choy (Brassica campestris var. chinensis) plants in Hungary. The virus isolated from Pak-Choy (isolate PC) caused pronounced vein clearing, vein yellowing, outstanding variegation and bright yellow mosaic symptoms in those plants. TYMV-PC was studied by means of test plants, light microscope, as well as serologically. Cruciferous test plants responded with vein clearing and bright yellow mosaic symptoms on leaves following inoculation with isolate PC, a reaction characteristic of TYMV. In cruciferous test plants, isolate PC caused plastid alterations typical of TYMV infection, consisting of clumping, swelling, vacuolating and discrup ting of plastids. In serological agar gel double diffusion experiments with antiserum against a Yugoslav TYMV isolate (TYMV-Y65), isolate PC was proved to belong to TYMV. This is the first report on TYMV in Pak-Choy. Turnip yellow mosaic virus (TYMV) infiziert Pak-Choy (Brassica campestris var. chinensis, Sorte 'JaPro RS-2781') in Ungarn spontan. Das Virusisolat PC verursachte auf diesen Pflanzen eine deutliche Adernaufhellung, Adernvergilbung, Buntfarbigkeit und Symptome eines hellen Gelbmosaiks. Das TYMV-Isolat PC wurde mit Hilfe von Testpflanzen, lichtmikroskopisch sowie serologisch untersucht. Cruciferen als Testpflanzen reagierten mit Adernaufhellung und hellgelben, für TYMV typischen Mosaiksymptomen; ferner verursachte das Isolât PC des TYMV Plastidveränderungen in Form der Verklumpung, Anschwellung, Vakuolisierung bis zur Zerstörung der Piastiden. Mit Hilfe eines Antiserums gegen ein jugoslawisches Isolat Y65 des TYMV wurde serologisch im Agargel-Doppeldiffusionstest bestätigt, daß das Isolât PC dem TYMV zuzuordnen ist. Dies ist der erste Bericht über das TYMV an Pak-Choy.

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