Nitidulids as vectors of the oak wilt fungus and other Ceratocystis spp. in Texas

Appel, David N.; Kurdyla, T.; Lewis, Robert W.

doi:10.1111/j.1439-0329.1990.tb01156.x

Cited by 23 publications

(10 citation statements)

References 14 publications

(11 reference statements)

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“…1999) or biotic vectors, predominantly insects (e.g. Bultman & White 1988; Appel et al . 1990; Michailides & Morgan 1992; Roy 1994; Pfunder & Roy 2000; Naef et al .…”

Section: Introductionmentioning

confidence: 99%

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Parental tracking in the postfire wood decay ascomycete Daldinia loculata using highly variable nuclear gene loci

et al. 2003

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The origin of the male and female gametes involved in fertilization events within a local population of the postfire wood decay ascomycete Daldinia loculata was investigated by genotyping the mycelia growing in the wood and the sexual ascospores, using three highly variable nuclear gene loci. The study was conducted in a geographically isolated burned forest site in southern Sweden. An intensive sampling was performed by collecting stromata containing ascospores and wood samples containing mycelia. In total, from 32 mapped burned birches, cultures of 22 haploid genets from decayed wood and six ascospores from each of 19 stromata were isolated and analysed. In 80% of the investigated burned branches, only one genet was found. From the analysis of the ascospore genotypes, we detected 30 fertilization events and 60% of them were the result of mating between conidia (clonal propagules) acting as male gametes and the genets in the branches representing the female gametes. The male parents producing the conidia were detected within the same local population as the female parents in 27% of the fertilization events and originated either from the same branch or from different trees located at 0.5-36 m away from the female parents. In 33% of the fertilization events, conidia originated from three male parents that were not found within the local population sampled. These parents could be anywhere inside or outside the sampled area. For the remaining fertilization events, we could not rule out the ascospores or the conidia as fertilizing propagules. No strong evidence for fertilization by recombinant propagules (ascospores) was detected in this study. The pyrophilous insect species associated with conidia of D. loculata are suggested to be essential vectors for the realization of the sexual cycle of this fungal species. By feeding on the conidia and flying between nearby trees inhabiting wood decay mycelia, these insects allow the transfer of conidia and therefore the opposite mating types to meet within a localized burned forest site.

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“…1999) or biotic vectors, predominantly insects (e.g. Bultman & White 1988; Appel et al . 1990; Michailides & Morgan 1992; Roy 1994; Pfunder & Roy 2000; Naef et al .…”

Section: Introductionmentioning

confidence: 99%

“…Fitt & McCartney 1986;Ntahimpera et al 1999) or biotic vectors, predominantly insects (e.g. Bultman & White 1988;Appel et al 1990;Michailides & Morgan 1992;Roy 1994;Pfunder & Roy 2000;Naef et al 2002). An obvious advantage of biotic as opposed to abiotic (wind, water) transport of gametes is that insects move in a directed fashion.…”

Section: Introductionmentioning

confidence: 99%

Parental tracking in the postfire wood decay ascomycete Daldinia loculata using highly variable nuclear gene loci

et al. 2003

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“…During the course of the past approximately 60 years, the name Ceratocystis fagacearum has also been adopted by plant pathologists and mycologists working on all aspects of the important disease known as oak wilt and the biology of the fungus (e.g. Shigo 1958, Cobb et al 1965, Peplinksi and Merrill 1974, Gibbs and French 1980, Juzwik and French 1983, Appel et al 1990, Kile 1993, Gibbs 2003, Juzwik et al 2008, 2011. A search on 26 August 2017 for C. fagacearum in Google Scholar and Google respectively yielded 1940 and 119000 hits, while the name Ch.…”

Section: Mycobank Mb822520mentioning

confidence: 99%

Bretziella, a new genus to accommodate the oak wilt fungus, Ceratocystis fagacearum (Microascales, Ascomycota)

Beer¹,

Marincowitz²,

Duong³

et al. 2017

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Recent reclassification of the Ceratocystidaceae (Microascales) based on multi-gene phylogenetic inference has shown that the oak wilt fungus Ceratocystis fagacearum does not reside in any of the four genera in which it has previously been treated. In this study, we resolve typification problems for the fungus, confirm the synonymy of Chalara quercina (the first name applied to the fungus) and Endoconidiophora fagacearum (the name applied when the sexual state was discovered). Furthermore, the generic placement of the species was determined based on DNA sequences from authenticated isolates. The original specimens studied in both protologues and living isolates from the same host trees and geographical area were examined and shown to represent the same species. A lectotype was designated for Chalara quercina and Endoconidiophora fagacearum and an epitype linked to a living ex-epitype isolate was designated. Phylogenetic analyses confirmed that the species resides in a well-supported monophyletic lineage in the Ceratocystidaceae, distinct from all other genera in the family. The new genus Bretziella is described to accommodate the oak wilt fungus.

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“…Propagules of O. quercus have been isolated from both free-flying (2,12) and mat-inhabiting nitidulids (12). In addition, nitidulids are common in fresh wounds on healthy oaks (4,18).…”

mentioning

confidence: 99%

Acquisition of Ophiostoma quercus and Ceratocystis fagacearum by Nitidulids from O. quercus-Colonized Oak Wilt Mats

1998

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Field experiments were conducted to determine whether the frequency of Ceratocystis fagacearum and Ophiostoma quercus propagule acquisition by nitidulids visiting oak wilt fungal mats is affected by the presence of O. quercus on the mats. Augmentation sprays with O. quercus were used to achieve different levels of mat colonization by that fungus. The extent of colonization by O. quercus 7 to 14 days after spraying was greatest for postmature mats with open cracks (>0.5 cm) observed on the spray date (P< 0.02). Specifically, all six subsamples assayed per mat for 16 of 18 open, O. quercus-sprayed, postmature mats yielded O. quercus. The frequency of nitidulids with O. quercus was also highest (83%) for those collected from O. quercus-treated, postmature mats that were open on the spray date. The frequency of nitidulids with viable C. fagacearum (88%), however, was also greatest for beetles from the postmature mats. Thus, O. quercus colonization did not affect vector acquisition of C. fagacearum from the mats. In addition, O. quercus vectored by nitidulids probably does not result in natural biological control of overland transmission of C. fagacearum at fresh wound surfaces on healthy oaks, as previously suggested.

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Nitidulids as vectors of the oak wilt fungus and other Ceratocystis spp. in Texas

Cited by 23 publications

References 14 publications

Parental tracking in the postfire wood decay ascomycete Daldinia loculata using highly variable nuclear gene loci

Parental tracking in the postfire wood decay ascomycete Daldinia loculata using highly variable nuclear gene loci

Bretziella, a new genus to accommodate the oak wilt fungus, Ceratocystis fagacearum (Microascales, Ascomycota)

Acquisition of Ophiostoma quercus and Ceratocystis fagacearum by Nitidulids from O. quercus-Colonized Oak Wilt Mats

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