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Cherry chlorotic rusty spot and Amasya cherry diseases are associated with a complex pattern of mycoviral-like double-stranded RNAs. II. Characterization of a new species in the genus Partitivirus

Serap Açkgöz⁶

¹ Department of Biological Sciences, Imperial College London, Imperial College Road, London SW7 2AZ, UK
² Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, Avenida de los Naranjos s/n, 46022 Valencia, Spain
³ Dipartimento di Arboricoltura, Botanica e Patologia Vegetale, Università di Napoli, 80055 Portici, Italy
⁴ Dipartimento di Protezione delle Piante e Microbiologia Applicata, Università degli Studi and Istituto di Virologia Vegetale del CNR, Sezione di Bari, 70126 Bari, Italy
⁵ Tekirdag Ziraat Fakültesi, Trakya Universitesi, 59030 Tekirdag, Turkey
⁶ Adnan Menderes University, Agricultural Faculty, Plant Pathology Department, 09100 Aydin, Turkey

Correspondence
Ricardo Flores
rflores{at}ibmcp.upv.es

Two dsRNAs from cherry trees affected with cherry chlorotic rusty spot (CCRS) in Italy and Amasya cherry disease (ACD) in Turkey were sequenced and found to be essentially identical. The larger dsRNA 1 (2021 or 2006 bp, respectively) potentially encoded a protein of 621 aa containing the conserved motifs of the RNA-dependent RNA polymerases (RdRp) of dsRNA mycoviruses, having highest similarity with those in the genus Partitivirus. The smaller dsRNA 2 (1841 or 1839 bp, respectively) had properties consistent with the second genomic component of a partitivirus and potentially encoded the coat protein (CP) of 504 aa. Phylogenetic analysis based on the RdRp and CP was coincidental and indicated that species in the genus Partitivirus could be separated into two subgroups. Because species of this genus only infect fungi, these observations suggest a fungal aetiology for CCRS and ACD, further substantiating a previous proposal (see accompanying paper by Covelli et al., 2004, in this issue).

The GenBank/EMBL/DDBJ accession numbers of the sequences reported in this paper are AJ781168 and AJ781167 for ACD-associated dsRNAs 1 and 2 and AJ781401 and AJ781402 for CCRS-associated dsRNAs 1 and 2.

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				Z. Kozlakidis, L. Covelli, F. Di Serio, A. Citir, S. Acikgoz, C. Hernandez, A. Ragozzino, R. Flores, and R. H. A. Coutts Molecular characterization of the largest mycoviral-like double-stranded RNAs associated with Amasya cherry disease, a disease of presumed fungal aetiology. J. Gen. Virol., October 1, 2006; 87(Pt 10): 3113 - 3117. [Abstract] [Full Text] [PDF]