Phyllosticta citricarpa and sister species of global importance to Citrus

Guarnaccia, Vladimiro ; Gehrmann, Thies ; Silva-Junior, Geraldo J. ; Fourie, Paul H. ; Haridas, Sajeet ; Vu, Duong ; Spatafora, Joseph ; Martin, Francis M. ; Robert, Vincent ; Grigoriev, Igor V. ; Groenewald, Johannes Z. ; Crous, Pedro W. (2020)

CITATION: Guarnaccia, V., et al. 2019. Phyllosticta citricarpa and sister species of global importance to Citrus. Plant Pathology, 20(12):1619-1635, doi:10.1111/mpp.12861.

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Several Phyllosticta species are known as pathogens of Citrus spp., and are responsible for various disease symptoms including leaf and fruit spots. One of the most important species is P. citricarpa, which causes a foliar and fruit disease called citrus black spot. The Phyllosticta species occurring on citrus can most effectively be distinguished from P. citricarpa by means of multilocus DNA sequence data. Recent studies also demonstrated P. citricarpa to be heterothallic, and reported successful mating in the laboratory. Since the domestication of citrus, different clones of P. citricarpa have escaped Asia to other continents via trade routes, with obvious disease management consequences. This pathogen profile represents a comprehensive literature review of this pathogen and allied taxa associated with citrus, focusing on identification, distribution, genomics, epidemiology and disease management. This review also considers the knowledge emerging from seven genomes of Phyllosticta spp., demonstrating unknown aspects of these species, including their mating behaviour.

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