INTRODUCTION Prune dwarf ilarvirus (PDV) and its various strains cause many types of stone fruit diseases of considerable economic importance (Nemeth, 1986). The virus induces considerable damage in many hosts either by itself or in a mixed infection with other stone fruit viruses. PDV is transmitted naturally by infected pollen. PDV has worldwide distribution, especially where sweet and sour c...

in recent years, symptoms of virus diseases on stone fruits have been observed in wide range in golestan province. in order to study the important viruses on stone fruits, cherry, plum, nectarine, peach and apricot trees with symptoms such as mosaic, chlorosis, ring spot, shot hole, pale margins in leaves and dwarf in trees, sampling was done during 2005. putative infected plants were tested by...

Plum pox virus (PPV) causes the most economically-devastating viral disease in Prunus species. Unfortunately, few natural resistance genes are available for the control of PPV. Recessive resistance to some potyviruses is associated with mutations of eukaryotic translation initiation factor 4E (eIF4E) or its isoform eIF(iso)4E. In this study, we used an RNA silencing approach to manipulate the e...

Selected problems related to non-uniformity of plant virus sequence variants present in infected plants and imperfectness of current diagnostic methods are illustrated and discussed. A failure of some primers to react (efficiently) with atypical isolates/strains of Apple chlorotic leaf spot virus (ACLSV) and Plum pox virus (PPV) is demonstrated. On the other hand, problematic positive reactions...

Introduction Sharka or plum pox disease is considered one of the most devastating diseases of stone fruits in terms of agricultural impact and economic importance (Dunez and Sutic, 1988; Nemeth, 1994). The disease is detrimental to apricot, peach and plum trees as it results in reduced quality and premature dropping of fruits. The causal agent is plum pox virus (PPV), a member of the Potyvirus ...

Over an approximately 80-year period since the description of the Sharka disease, the plum pox virus (PPV) has been thoroughly studied on various levels of the infection cycle. World-wide distribution of the virus, severity of the disease for the fruit industry with a potential to be further increased and discovery/emergence of new strains make PPV the most epidemiologically important viral pat...

The present study was conducted on 106 leaf samples of Prunus species (44 plum, 47 myrobalan 10 apricot, 3 peach, 1 blackthorn, and sour cherry) collected from the Vojvodina province Serbia assessed for presence Plum pox virus (PPV) with aim establishing whether trees growing along roadsides in backyards could be sources PPV infection commercial orchards. Analyses confirmed 68.2%, 38.6%, 20% pl...

This work describes, for the first time, the changes taking place in the antioxidative system of the leaf apoplast in response to plum pox virus (PPV) in different Prunus species showing different susceptibilities to PPV. The presence of p-hydroxymercuribenzoic acid (pHMB)-sensitive ascorbate peroxidase (APX) (class I APX) and pHMB-insensitive APX (class III APX), superoxide dismutase (SOD), pe...

It is well-known that polyphenolic compounds are found abundantly in fruit, but various kinds of diseases lower these levels. This work measures total polyphenolic content, antioxidant activity and the levels of specific important antioxidants in fruits of the genetically modified (GM) plum variety HoneySweet, trees which were previously inoculated with a range of different virus infections. Th...

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...