brief report detection of plum pox virus (ppv) from stone fruits in khorasan razavi province, iran

plum pox virus (ppv), the causal agent of sharka disease, belongs to the genus potyvirus in the family potyviridae and has been reported from some regions of iran. surveys were conducted to determine the incidence of the virus in khorasan razavi province in 2010 and 2011 and 553 samples of stone fruit trees were collected and tested by das-elisa. in this method 12 samples were infected with ppv. rt-pcr with specific primers amplified 467bp band in 3 samples. dna fragment of kadkan region was sequenced after purification from gel. the determined sequence of irn-kdn isolate were compared with previously reported 29 ppv isolates, using clustalw2. in phylogenetic analyses based on clustalw multiple alignment and mega 5.1, irn kdn displayed the highest (98% and 96%) identity with two japanese isolates and the lowest (95% and 90%) identity with isolate of slovakia at nucleotide and amino acid sequence levels, respectively.