Phylogenomic comparisons of the seventeen species of wood-colonizing fungi revealed clade-specific expansion of gene families representing putative virulence factors involved in toxin production and mobilization, wood degradation, and nutrient uptake.
Results revealed significant variation in virulence in terms of the length of the internal wood lesions caused by these seventeen species. Isolates of seventeen species, originating from symptomatic apricot, grape, pistachio, and walnut were tested for pathogenicity on grapevine wood after 4 months of incubation in potted plants in the greenhouse. Species in the genera Botryosphaeria, Diplodia, Dothiorella, Lasiodiplodia, Neofusicoccum, and Neoscytalidium attack a range of horticultural crops, but they vary in virulence and their abilities to infect their hosts via different infection courts (flowers, green shoots, woody twigs). The Botryosphaeriaceae is a fungal family that includes many destructive vascular pathogens of woody plants (e.g., Botryosphaeria dieback of grape, Panicle blight of pistachio). 6Crops Pathology and Genetics Research Unit, United States Department of Agriculture – Agricultural Research Service, Davis, CA, United States.5Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA, United States.4Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Mexico.3Department of Ecology and Evolutionary Biology, University of California, Irvine, Irvine, CA, United States.2Department of Plant Pathology, University of California, Davis, Davis, CA, United States.1Department of Viticulture and Enology, University of California, Davis, Davis, CA, United States.Rolshausen 5, Kendra Baumgartner 6 and Dario Cantu 1* Lawrence 2, Abraham Morales-Cruz 1,3, Renaud Travadon 2, Andrea Minio 1, Rufina Hernandez-Martinez 4, Philippe E.
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