The genomic fragments of two open reading frames (ORFs) 1 and 2 of German and Canadian PAV isolates of Barley yellow dwarf virus (BYDV-PAV) were sequenced. Sequences only slightly differed from previously published sequences of this virus. Two polyclonal antisera against proteins encoded by ORFs 1 and 2 of a German ASL-1 isolate were developed using recombinant antigens expressed in E. coli as a fusion either to His 6 ) or thioredoxin-tags. In Western blot analysis with total protein extracts from BYDV infected plants, antisera efficiently recognized the 99 kDa fusion protein expressed from ORF1 and ORF2 (P1-P2 protein). Later in infection the P1-P2 protein disappeared and two smaller proteins, revealing sizes of 39 and 60 kDa, could be detected.
Zusammenfassung Das Potato virus Y (PVY) gehört im Kartoffelbau weltweit zu den wichtigsten Schadviren und hat das Potato leafroll virus (PLRV) von der Bedeutung her verdrängt. Es kann nicht-persistent durch verschiedene Blattlausarten übertragen werden. Für die Warndienste ist es wichtig, beim Auftreten von Vektoren feststellen zu können, ob diese auch mit dem Virus beladen und somit in ihrer Eigenschaft als Virusüberträger zu bekämpfen sind. Verschiedene Nachweismethoden für die Detektion des Virus in Aphiden auf der Basis einer reversen Transcriptase-PCR-Reaktion wurden verglichen. Dabei erwies sich eine von Olmos et al. (2005) beschriebene Methode hinsichtlich Praktikabilität und Empfindlichkeit als besonders gut geeignet. Mit ihr konnte das Virus in verschiedenen Vektorarten nachgewiesen werden.Schlüsselwörter Potato virus Y · PVY · Barley yellow dwarf virus · BYDV · Aphiden · Myzus persicae · Rhopalosium padi · RT-PCR · Nachweis Abstract Potato virus Y (PVY) causes great economic losses in potato production world-wide. Concerning important it has replaced Potato leafroll virus (PLRV). Virus is transmitted by different aphid species in a non-persistent manner. During last years the developing of new effective methods for PVY monitoring, forecasting and detection in aphids is of increasing interest. Sensitive, rapid detection of virus in its natural vectors is of a great need to investigate the relationship between aphid migration and the spread of PVY. Simple diagnostic protocol for the detection of non-persistent Plum pox virus and semipersistent Citrus tristeza virus in aphids, proposed by Olmos et al. (2005) was probed to validate and estimate the efficiency of its applying for the detection of PVY in different aphid species too.Keywords Potato virus Y · PVY · Barley yellow dwarf virus · BYDV · Aphiden · Myzus persicae · Rhopalosium padi · RT-PCR · Detection Einleitung und Zielsetzung
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