Articles
PLUM POX POTYVIRUS SITUATION IN EGYPTIAN STONE FRUIT TREES
Article number
488_124
Pages
745 – 752
Language
Abstract
Plum pox potyvirus (PPV) incidence was reported in 1987. The virus isolation, identification, and cytological virus-host relationship were studied.
Incidence of the virus was determined by visual examination and DAS-ELISA, at the same time.
It was 51.0% in apricot and 10.4% and 34.6% in peach and plum respectively.
Fayium, Giza (Middle Egypt), Dakahlia, Qualubia, Munofia and Sharkia (Lower Egypt) were included in the survey.
Fayium had the highest incidence.
Virus incidence ranged between 2.2% to 57.9% during 1987–1997. Apricot old trees had more PPV incidence (15.5 %) than younger ones (4.8%). The Balady apricot variety is less susceptible (5.1%) and the Hamawey variety is the most susceptible (62.2%). Buds, petals, leaves and limbs had the highest virus concentration, during February to September.
Egyptian PPV (El-Amar) isolate was sequenced (3′-terminal 4773 nucleotides of viral RNA). The N-terminal region of the capsid protein, postulated to be involved in the aphid transmission mechanism of the virus, was found to be the region which differed most between the PPV strains and El-Amar strain.
The virus reduced 31 % of apricot yield.
It increased the pH and total phenols in the fruit of PPV-diseased trees.
Recent research is being done to have virus-free mother plants of stone fruits.
Also, PPV diversity in Egypt is being studied using molecular biological approach.
Incidence of the virus was determined by visual examination and DAS-ELISA, at the same time.
It was 51.0% in apricot and 10.4% and 34.6% in peach and plum respectively.
Fayium, Giza (Middle Egypt), Dakahlia, Qualubia, Munofia and Sharkia (Lower Egypt) were included in the survey.
Fayium had the highest incidence.
Virus incidence ranged between 2.2% to 57.9% during 1987–1997. Apricot old trees had more PPV incidence (15.5 %) than younger ones (4.8%). The Balady apricot variety is less susceptible (5.1%) and the Hamawey variety is the most susceptible (62.2%). Buds, petals, leaves and limbs had the highest virus concentration, during February to September.
Egyptian PPV (El-Amar) isolate was sequenced (3′-terminal 4773 nucleotides of viral RNA). The N-terminal region of the capsid protein, postulated to be involved in the aphid transmission mechanism of the virus, was found to be the region which differed most between the PPV strains and El-Amar strain.
The virus reduced 31 % of apricot yield.
It increased the pH and total phenols in the fruit of PPV-diseased trees.
Recent research is being done to have virus-free mother plants of stone fruits.
Also, PPV diversity in Egypt is being studied using molecular biological approach.
Publication
Authors
A. Aboul-Ela, A.E. Aboul-Ata, H.M. Mazyad
Keywords
Plum pox virus, Virus identification, Molecular characterization, PPV-ElAmar strain, Apricot, Peach, Plum
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