Reclassification of the butternut canker fungus, Sirococcus clavigignenti-juglandacearum, into the genus Ophiognomonia

Broders, Kirk; Boland, G. J.

doi:10.1016/j.funbio.2010.10.007

Cited by 35 publications

(33 citation statements)

References 33 publications

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“…A stem canker disease of butternut caused by the ascomycete fungus Ophiognomonia clavigignenti-juglandacearum (Oc-j) (=Sirococcus clavigignenti-juglandacearum) (Broders and Boland 2011) was first reported in the late 1960s (Renlund 1971), although it was most likely introduced decades prior in some areas (Broders et al 2012(Broders et al , 2014. Cankers generally initiate in small crown branches, spreading to main limbs and the trunk (Nair et al 1979;Ostry and Woeste 2004) and causing mortality either when cankers coalesce to girdle the stem or when secondary decay results in breakage or windfall.…”

Section: Introductionmentioning

confidence: 99%

Estimating heritability of disease resistance and factors that contribute to long-term survival in butternut (Juglans cinerea L.)

LaBonte

Ostry

Ross‐Davis

et al. 2015

Tree Genetics & Genomes

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For most wild species affected by exotic pests or pathogens, the relative importance of heritable genetic differences in determining apparent variation in disease resistance is unknown. This is true in particular for butternut, a North American hardwood affected by butternut canker disease and undergoing demographic contraction. Little is known about site effects on butternut decline, in part because long-term monitoring data are lacking. We collected detailed disease phenotypes and multilocus microsatellite genotypes for all surviving individuals in a large natural population of butternut in 2003 (n= 302) and 2012 (n=113). Two analytical methods, correlations between pairwise phenotypic similarity and pairwise relatedness, and estimation of among-family variance, both indicated weak heritability of disease-related traits and no heritability for overall tree health in the population. Additionally, an analysis of spatial data collected in 2001 (n=341) and 2012 (n=113) demonstrated that drier, upland sites contribute to increased likelihood of survival. We conclude that genetic differences among wild butternut individuals contributed little to observed variance in survival over 10 years but fine-scale site differences were useful predictors of butternut mortality.

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Section: Introductionmentioning

confidence: 99%

Estimating heritability of disease resistance and factors that contribute to long-term survival in butternut (Juglans cinerea L.)

LaBonte

Ostry

Ross‐Davis

et al. 2015

Tree Genetics & Genomes

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“…Many species of Gnomoniaceae cause significant damage as plant pathogens on ornamental, nut, and lumber-producing trees, including Discula destructiva (dogwood anthracnose), Ophiognomonia clavigignenti-juglandacearum (butternut canker), and Apiognomonia erythrostoma (cherry leaf scorch; Anderson & LaMadeleine, 1978;Redlin, 1991;Rossman, Farr & Castlebury, 2007;Broders & Boland, 2011). Many species of Gnomoniaceae cause significant damage as plant pathogens on ornamental, nut, and lumber-producing trees, including Discula destructiva (dogwood anthracnose), Ophiognomonia clavigignenti-juglandacearum (butternut canker), and Apiognomonia erythrostoma (cherry leaf scorch; Anderson & LaMadeleine, 1978;Redlin, 1991;Rossman, Farr & Castlebury, 2007;Broders & Boland, 2011).…”

Section: Introductionmentioning

confidence: 99%

Host conservatism or host specialization? Patterns of fungal diversification are influenced by host plant specificity inOphiognomonia(Gnomoniaceae: Diaporthales)

Walker

Castlebury

Rossman

et al. 2013

Biol J Linn Soc Lond

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In this study evolutionary host plant patterns at ranks from order to species were analysed using spatial evolutionary and ecological vicariance analysis (SEEVA), based on a multigene phylogeny of 45 ascomycete fungal species. The objective was to understand speciation events and host associations in Ophiognomonia (Gnomoniaceae). Species of this genus are perithecial fungi that occur as endophytes, pathogens, and latent saprobes on plants in the families of Betulaceae, Fagaceae, Juglandaceae, Lauraceae, Malvaceae, Platanaceae, Rosaceae, Salicaceae, and Sapindaceae. A second objective was to determine whether speciation events are influenced by host conservatism, host specialization, or host switching at different taxonomic host ranks. Host differences between sister clades were interpreted using the divergence index (D) from the SEEVA analysis, ranging from 0 for no divergence to 1 for maximum possible divergence. Several fungal subclades showed clear patterns of host order/family conservatism (D = 1.00) for hosts in Betulaceae, Fagaceae, Juglandaceae, and Rosaceae. Clear trends of host specialization at host genus and species ranks (D = 1.00) were suggested within these host families. Independent host jumps were observed for two species at the family rank and three at the order rank. As a result of this study, host specificity and specialization is hypothesized as a mechanism that can strongly contribute to speciation patterns in fungal pathogens.

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“…Similarly, G. mórbida has been isolated from WTB galleries in declining J. californica and J. hindsii in California (6,25) but the relative susceptibility of these species to the fungus from controlled experiments has not been reported previously. The J. cinérea population throughout the eastern United States and Canada has been decimated by butternut canker caused by Ophiognomonia clctvigignenti-jtiglctncktcearum (1,4,19) and further damage or mortality caused by TCD could be serious. The J. cinérea population throughout the eastern United States and Canada has been decimated by butternut canker caused by Ophiognomonia clctvigignenti-jtiglctncktcearum (1,4,19) and further damage or mortality caused by TCD could be serious.…”

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confidence: 99%

Susceptibility of Walnut and Hickory Species to Geosmithia morbida

et al. 2013

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Utley, C, Nguyen, T., Roubtsova, T, Coggeshall, M., Ford, T. N. 2013. Susceptibility of walnut and hickory species to Geosmithia mórbida. Plant Dis. 97:601-607.Thousand cankers disease (TCD) of walnut is a result of feeding in the phloem by the walnut twig beetle (WTB), Pityophthorus juglandis, and subsequent canker formation caused by Geosmithia mórbida around galleries. TCD has caused extensive morbidity and mortality to Juglans nigra in the western United States and, in 2010, was discovered in the eastern United States, where the tree is a highly valuable timber resource. WTB and G. mórbida also have been found in / regia orchards throughout major production areas in California, and the numbers of damaged trees are increasing. We tested the susceptibility of walnut and hickory species to G. mórbida in greenhouse and field studies. Carya illinoinensis, C. aquatica, and C. ovata were immune. All wal-nut species tested, including / ailantifolia, J. californica, J. cinérea, J. hindsii, J. major, J. mandshurica, J. microcarpa, J. nigra, and J. regia, developed cankers following inoculation with G. mórbida. J. nigra was the most susceptible, whereas / major, a native host of the WTB and, presumably, G. mórbida, had smaller and more superficial cankers. Canker formation differed among maternal half-sibling families of / nigra and / cinérea, indicating genetic variability in resistance to G. mórbida. Our inoculation studies with G. mórbida have corroborated many of the field observations on susceptibility of walnut and hickory species to TCD, although the ability of the WTB to successfully attack and breed in walnut is also an important component in TCD resistance.

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Reclassification of the butternut canker fungus, Sirococcus clavigignenti-juglandacearum, into the genus Ophiognomonia

Cited by 35 publications

References 33 publications

Estimating heritability of disease resistance and factors that contribute to long-term survival in butternut (Juglans cinerea L.)

Estimating heritability of disease resistance and factors that contribute to long-term survival in butternut (Juglans cinerea L.)

Host conservatism or host specialization? Patterns of fungal diversification are influenced by host plant specificity inOphiognomonia(Gnomoniaceae: Diaporthales)

Susceptibility of Walnut and Hickory Species to Geosmithia morbida

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