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        Diversity Evaluation of Xylella fastidiosa from Infected Olive Trees in Apulia (Southern Italy)

        Mang, Stefania M.,Frisullo, Salvatore,Elshafie, Hazem S.,Camele, Ippolito The Korean Society of Plant Pathology 2016 Plant Pathology Journal Vol.32 No.2

        Olive culture is very important in the Mediterranean Basin. A severe outbreak of Olive Quick Decline Syndrome (OQDS) caused by Xylella fastidiosa infection was first noticed in 2013 on olive trees in the southern part of Apulia region (Lecce province, southern Italy). Studies were carried out for detection and diversity evaluation of the Apulian strain of Xylella fastidiosa. The presence of the pathogen in olive samples was detected by PCR amplifying the 16S rDNA, gyrase B subunit (gyrB) and HL hypothetical protein genes and single nucleotide polymorphisms (SNPs) assessment was performed to genotype X. fastidiosa. Twelve SNPs were recorded over gyrB and six SNPs were found for HL gene. Less variations were detected on 16S rDNA gene. Only gyrB and HL provided sufficient information for dividing the Apulian X. fastidiosa olive strains into subspecies. Using HL nucleotide sequences was possible to separate X. fastidiosa into subspecies pauca and fastidiosa. Whereas, nucleotide variation present on gyrB gene allowed separation of X. fastidiosa subsp. pauca from the other subspecies multiplex and fastidiosa. The X. fastidiosa strain from Apulia region was included into the subspecies pauca based on three genes phylogenetic analyses.

      • KCI등재

        Diversity Evaluation of Xylella fastidiosa from Infected Olive Trees in Apulia (Southern Italy)

        Stefania M. Mang,Salvatore Frisullo,Hazem S. Elshafie,Ippolito Camele 한국식물병리학회 2016 Plant Pathology Journal Vol.32 No.2

        Olive culture is very important in the MediterraneanBasin. A severe outbreak of Olive Quick Decline Syndrome(OQDS) caused by Xylella fastidiosa infectionwas first noticed in 2013 on olive trees in the southernpart of Apulia region (Lecce province, southern Italy). Studies were carried out for detection and diversityevaluation of the Apulian strain of Xylella fastidiosa. The presence of the pathogen in olive samples wasdetected by PCR amplifying the 16S rDNA, gyrase Bsubunit (gyrB) and HL hypothetical protein genes andsingle nucleotide polymorphisms (SNPs) assessmentwas performed to genotype X. fastidiosa. Twelve SNPswere recorded over gyrB and six SNPs were found forHL gene. Less variations were detected on 16S rDNAgene. Only gyrB and HL provided sufficient informationfor dividing the Apulian X. fastidiosa olive strainsinto subspecies. Using HL nucleotide sequences waspossible to separate X. fastidiosa into subspecies paucaand fastidiosa. Whereas, nucleotide variation presenton gyrB gene allowed separation of X. fastidiosa subsp. pauca from the other subspecies multiplex and fastidiosa. The X. fastidiosa strain from Apulia region wasincluded into the subspecies pauca based on three genesphylogenetic analyses.

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