Identity and pathogenicity of some fungi associated with hazelnut (Corylus avellana L.) trunk cankers in Oregon

Autoři: Nik G. Wiman aff001;  John Bryan Webber, III aff002;  Michele Wiseman aff003;  Lea Merlet aff002
Působiště autorů: Oregon State University, Department of Horticulture, North Willamette Research and Extension Center, Aurora, Oregon, United States of America aff001;  Oregon State University, Department of Horticulture, Corvallis, Oregon, United States of America aff002;  Oregon State University, Department of Botany and Plant Pathology, Corvallis, Oregon, United States of America aff003
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article
doi: 10.1371/journal.pone.0223500


Four fungi isolated from trunks and branches of European hazelnut (Corylus avellana L.) from commercial orchards in the Willamette Valley, Oregon were characterized and pathogenicity was tested on potted hazelnut trees. The acreage of hazelnuts in Oregon has expanded greatly in recent years in response to the availability of Eastern filbert blight resistant cultivars. Fungi were characterized using the BLASTn algorithm and the GenBank database with multiple partial gene sequence(s). If BLASTn and GenBank were not sufficient for species-level identification, then a multilocus sequence analysis (MLSA) was performed. The four pathogens were identified as Diplodia mutilla (Fr.) Mont., Dothiorella omnivora B.T. Linaldeddu, A. Deidda & B. Scanu, Valsa cf. eucalypti Cooke & Harkn., and Diaporthe eres Nitschke. All pathogens but D. omnivora have not been previously reported from European hazelnut in the literature. All four pathogens caused lesions on trunks bare root hazelnut trees cv. ‘Jefferson’ planted in pots in the greenhouse and fungi were re-isolated from inoculated trees. D. mutilla appeared particularly aggressive in repeated inoculation experiments.

Klíčová slova:

Fungal pathogens – Fungi – Pathogenesis – Phylogenetic analysis – Plant fungal pathogens – Trees – Valleys – Orchards


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