@ARTICLE{TreeBASE2Ref20956, author = {Shannon Colleen Lynch and Akif Eskalen and Paul J. Zambino and Joey S Mayorquin and Danny H Wang}, title = {Identification and pathogenicity of fungal species associated with declining Quercus agrifolia }, year = {2012}, keywords = {}, doi = {10.1094/PDIS}, url = {http://apsjournals.apsnet.org/loi/pdis}, pmid = {}, journal = {Plant Disease}, volume = {}, number = {}, pages = {}, abstract = {A decline of coast live oak (Quercus agrifolia) has been observed throughout southern California in areas both infested and uninfested by the goldspotted oak borer (GSOB). In this study, the identity and pathogenicity of non-Botryosphaeriaceae fungal species consistently recovered from necrotic tissues of branch and bleeding trunk canker samples from these areas were assessed. Species were identified morphologically and by comparison of the complete sequence of the internal transcribed spacer (ITS) of the rDNA to other isolate sequences in GenBank. Phylogenetic analyses were conducted using ITS and partial sequences of the ?-tubulin and mitochondrial small ribosomal subunit (SSU) genes for unknown species. Fusarium solani, Phaeoacremonium mortoniae, and Diatrypella verrucaeformis were identified and results support the erection of a new species, described herein as Cryptosporiopsis polymorpha sp.nov. One-year-old coast live oak seedlings were wound inoculated under controlled conditions to test pathogenicity of these species. Each fungal species was successfully re-isolated and represent new records of fungal pathogens of coast live oak in California. Isolates of F. solani were the most aggressive tested. Results from the pathogenicity test suggest that along with Botryosphaeriaceae species, these fungi play a role in the decline of southern Californian coast live oaks.} }

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