Plant Pathology (2023) 72, 290-299

Renata Ilicic, Aleksandra Jelusic, Predrag Milovanovic, Slavisa Stankovic, Katarina Zecevic, Rade Stanisavljevic and Tatjana Popovic (2023)
Characterization of Xanthomonas arboricola pv. pruni from Prunus spp. orchards in Western Balkans
Plant Pathology 72 (2), 290-299
Abstract: The present study provides a new insight into the existing Xanthomonas arboricola pv. pruni (Xap) bacterial population originating from peach and apricot in two Western Balkans countries (Serbia and Montenegro). Multilocus sequence typing and analysis of the sequences of nine housekeeping genes revealed homology between the tested Xap strains as well as with the European population of this bacterium. The tested strains share the same haplotype (Haplotype I) with the Xap strains from Italy, France, Spain, United States, Australia and Brazil. The revealed single nucleotide change (G <-> C) in the sequences of the gyrB1 gene differentiates Haplotype I from Haplotype II (Xap from South Korea, New Zealand, Argentina and Uruguay). The detached-leaf bioassay results confirmed differences in virulence between strains originating from peach and apricot towards Prunus armeniaca (apricot), indicating host specialization of the apricot strain towards this host. For the first time, immunity of P. fruticosa (European ground cherry) to Xap was established. According to the AUDPC, PCA and cluster analysis, other Prunus spp. were classified as having low susceptibility (P. mahaleb, P. cerasus and P. avium), as susceptible (P. domestica) and as highly susceptible (P. persica, P. dulcis, P. cerasifera and P. spinosa). Xap strains were also found to be susceptible to 10 tested antibiotics. This study provides valuable knowledge on the Xap population from stone fruit grown in the Western Balkans region as well as the source of immunity, which could serve as a starting point for breeding Prunus cultivars and could be used as the main control strategy.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Tatjana Popovic

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Xanthomonas arboricola pv. pruni	Apricot (Prunus armeniaca)	Serbia
	Xanthomonas arboricola pv. pruni	Peach/nectarine (Prunus persica)	Serbia
	Xanthomonas arboricola pv. pruni	Peach/nectarine (Prunus persica)	Montenegro