Identification of New Fungal Pathogens of Coast Live Oak in California

Lynch, Shannon C.; Zambino, Paul J.; Mayorquin, Joey S; Wang, Danny Ho; Eskalen, Akif

doi:10.1094/pdis-11-12-1055-re

Cited by 14 publications

(19 citation statements)

References 48 publications

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“…Regarding forest trees, Pm . fraxinopennsylvanicum has been reported from Fraxinus excelsior in Sweden (Groenewald et al., ), Fraxinus latifolia (Eskalen et al., ), Fraxinus pennsylvanica (Hausner et al., ) and Quercus agrifolia (Lynch et al., ) in USA. This study represents the first record of Pm .…”

Section: Discussionmentioning

confidence: 99%

“…Phaeoacremonium species occur mainly on grapevine. Nevertheless, there are a few reports of these pathogens from ornamental and forest trees (Eskalen et al., ; Groenewald et al., ; Hashemi & Mohammadi, ; Lynch et al., ; Mohammadi et al., ; Mostert et al., ; Réblová, ). Species of the Phaeoacremonium are important pathogens causing wilting and decline diseases of many woody plants (Crous et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…& P. Syd. (Lynch, Zambino, Mayorquin, Wang, & Eskalen, ; Pavlic‐Zupanc, Piškur, Slippers, Wingfield, & Jurc, ), Diatrypaceae Nitschke (Davidson & Lorenz, ; Hendry, Lonsdale, & Boddy, ) and Basidiomycetes (Annesi, Coppola, & Motta, ; Gonthier, Guglielmo, Sillo, Giordano, & Garbelotto, ) are well‐recognized trunk pathogens on forest trees worldwide. Members of the family Togniniaceae with the anamorph genus Phaeoacremonium are among the potential threats to woody plants including forest trees species.…”

Section: Introductionmentioning

confidence: 99%

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Decline‐associated Phaeoacremonium species occurring on forest trees in the north of Iran

2017

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Between 2013 and 2015, several surveys were conducted throughout forest areas in the north of Iran with the aim of isolating and identifying fungi present on trees showing decline symptoms. Fungal species, isolated from symptomatic wood tissues of various tree genera, including Zelkova, and Prunus, were morphologically identified and characterized. A molecular identification based on comparisons of DNA sequences of the β-tubulin gene allowed us to identify seven species belonging to Phaeoacremonium; namely, Phaeoacremonium parasiticum, Pm. alvesii, Pm. minimum, Pm. iranianum, Pm. scolyti, Pm. fraxinopennsylvanicum and Pm. croatiense were isolated and identified.Phaeoacremonium minimum was the most common species and isolated from Gleditsia caspica, Parrotia persica, Cydonia oblonga and Alnus glutinosa. Pathogenicity on selected plants using a mycelium plug inoculation method revealed that most of these species are pathogenic to all the tested trees, with Pm. parasiticum and Pm. minimum being the most pathogenic species. According to host plant species and geographical distribution, the majority of Phaeoacremonium species found represent new records. This is also the first report of Pm. croatiense in Iran and outside Croatia.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Decline‐associated Phaeoacremonium species occurring on forest trees in the north of Iran

2017

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“…(Réblová ), Quercus agrifolia Née (Lynch et al. ), Fraxinus excelsior L. (Groenewald et al. ) and Fraxinus latifolia Benth.…”

Section: Discussionmentioning

confidence: 99%

Identification and characterization of fungi associated with internal wood lesions and decline disease of willow and poplar trees in Iran

Hashemi

Mohammadi

2016

Forest Pathology

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Summary During the study of fungal trunk pathogens associated with urban trees decline in Shiraz (Iran), a serious decline of willow and poplar trees was observed. Therefore, an investigation was conducted on these trees in some areas of this city during spring and summer 2012 and 2013, to determine the main fungal trunk pathogens associated with these ornamental plants. Plant materials were collected from trees exhibiting disease symptoms such as yellowing, shoot canker, shoot dieback, defoliation and internal wood necrosis and decayed wood. Fungal isolations were made from discoloured or decayed wood tissue onto 2% malt extract agar (MEA) amended with streptomycin sulphate. Nine species, Fomes fomentarius, Diplodia seriata, Lasiodiplodia theobromae, Dothiorella sarmentorum, Neoscytalidium hyalinum, Diatrype whitmanensis, Phaeoacremonium rubrigenum, P. aleophilum and P. parasiticum, were identified based on morphology and DNA sequence comparisons. Pathogenicity tests were performed on detached shoots of willow and poplar trees under greenhouse conditions. Lasiodiplodia theobromae caused the longest lesions on willow. On poplar shoots, the longest lesions were caused by P. parasiticum. Diplodia seriata produced the smallest lesions on both woody hosts. First reports from willow wood include P. parasiticum, P. rubrigenum, D. whitmanensis, L. theobromae, D. seriata and N. hyalinum, while new reports from poplar wood include P. parasiticum and Do. sarmentorum. Based on our knowledge, this is also the first report of D. whitmanensis in Iran.

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“…In addition, several other newly recorded fungal pathogens of coast live oak in California were recovered from tissues associated with the aforementioned symptoms and were shown to cause these symptoms in pathogenicity tests (Lynch et al. ,b). Species include Diplodia agrifolia, Dothiorella iberica, Fusarium solani, Diatrypella verrucaeformis and Cryptosporiopsis querciphila ; D. agrifolia and C. querciphila were described as new species from this outbreak (Lynch et al.…”

Section: Introductionmentioning

confidence: 99%

Occurrence, incidence and associations among fungal pathogens and Agrilus auroguttatus, and their roles in Quercus agrifolia decline in California

et al. 2013

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Synchronous decline of oak (Quercus spp.) trees in woodlands has been described in Europe and eastern North America as a complex interaction of stressors that predispose, incite or contribute to tree death. This study presents a 2-year (2010-2011) assessment of the role of pathogens in coast live oak (Quercus agrifolia) woodlands in southern California where oak mortality occurs in locations that are infested and uninfested by the goldspotted oak borer (GSOB, Agrilus auroguttatus). Cumulative coast live oak mortality was not significantly different between sites and was weakly correlated with Diplodia corticola and GSOB incidence and negatively correlated with annual relative humidity. Multiple logistic regression models explained the presence of individual fungi or GSOB at the tree level. Fisher's exact test analysis determined that the presence of D. corticola, Fusarium solani, Dothiorella iberica, Cryptosporiopsis querciphila and Diatrypella verrucaeformis were each related to origin of sample location on tree, and C. querciphila was additionally related to symptom type on the bole. Multiple linear regression models showed high correlation between environmental variables and plot-level incidence of both GSOB and D. corticola. Disease incidence (DI) for D. corticola was highest in GSOB-uninfested locations. Jaccard index of association (J) showed that D. corticola was negatively associated with the presence of GSOB, F. solani and C. querciphila. Results suggest that oak decline in California is an example of a complex syndrome involving strong regional differences in factors that are associated with the problem.

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Identification of New Fungal Pathogens of Coast Live Oak in California

Abstract: Lynch, S. C, Zamhino, P. J., Mayorquin, J. S., Wang, D. H., and Eskalen, A. 2013. Identification of new fungal pathogens of coast live oak in California. Plant

Cited by 14 publications

References 48 publications

Decline‐associated Phaeoacremonium species occurring on forest trees in the north of Iran

Decline‐associated Phaeoacremonium species occurring on forest trees in the north of Iran

Identification and characterization of fungi associated with internal wood lesions and decline disease of willow and poplar trees in Iran

Occurrence, incidence and associations among fungal pathogens and Agrilus auroguttatus, and their roles in Quercus agrifolia decline in California

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