Pathogenicity of Fusarium species causing head blight in barley

Xue, Allen; Ho, K. M.; Butler, G.; Vigier, B.; Babcock, C. E.

doi:10.7202/013973ar

Cited by 37 publications

(51 citation statements)

References 23 publications

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“…in barley in nonepidemical years for FHB in Ontario. Both species are weak FHB pathogens of barley (Xue et al 2006a) and produce low or non-detectable levels of DON (Desjardins 2006). However, these species as a group are important producers of other mycotoxins, including beauvericin, fusarochromanone, moniliformin, zearalenone, T-2, HT-2, and T-2 tetraol, which are more toxic than DON (Desjardins 2006;Hestbjerg et al 2002;Salas et al 1999;Thrane et al 2004).…”

Section: Discussionmentioning

confidence: 99%

“…have been proven to be pathogenic on barley and play a role in the etiology of FHB in barley. Xue et al (2006a) were weakly pathogenic in causing FHB in barley. In Europe, F. graminearum, F. culmorum or, more rarely, F. avenaceum are the prevalent species found on barley depending on the country, with F. culmorum being more abundant in northern countries (Bottalico and Perrone 2002;Nielsen et al 2011).…”

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Effect of harvest date on barley grain contamination with Fusarium spp. and deoxynivalenol in northeastern Ontario

Xue

Rowsell²,

et al. 2013

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The effect of harvest date on the incidence of seed-borne Fusarium spp. and deoxynivalenol (DON) concentration in barley (Hordeum vulgare L.) was studied using three cultivars at three locations in Ontario in both 2004 and 2005. The profile of seed-borne Fusarium spp. was dominated by F. equiseti (Corda) Sacc., F. sporotrichioides Sherb., and F. poae (Peck) Wollenw., isolated from 4.4%, 3.3%, and 1.6% of the kernels, representing 39.3%, 29.4%, and 14.2% of the Fusarium pathogen population, respectively. Fusarium graminearum Schwabe and F. avenaceum (Fr.) Sacc. were each recovered from <1% of the kernels and represented 8.3% and 6.6% of the pathogen population, respectively. Other species, including F. acuminatum Ellis & Everh., F. culmorum (W.G. Sm.) Sacc., and F. semitectum Berk. & Rav., collectively occurred only on 0.2% of all kernels and represented <2% of the population. The incidence level of all Fusarium spp. increased from 6.9 to 13.9% when harvest was delayed. Of the commonly recovered species, only F. avenaceum and F. sporotrichioides levels increased with the delayed harvest, while other species did not follow a clear pattern. DON concentration in the harvested grain ranged from 0.20 to 0.28 mg kg‑1 with the five harvest dates, and was not statistically different. Significant differences in the incidence of all Fusarium spp. and in DON concentration were observed among cultivars, locations, and between the 2 yr of the study. The highest DON concentration observed in this study was 0.5 mg kg‑1, which is below the Canadian tolerance level of 1.0 mg kg‑1.L’effet de la date de récolte sur l’incidence des concentrations aéroportées de Fusarium spp. et de désoxynivalénol (DON) chez l’orge (Hordeum vulgare L.) a été étudié à l’aide de trois cultivars dans trois sites en Ontario en 2004 et 2005. Le profil des Fusarium spp. aéroportées était dominé par F. equiseti (Corda) Sacc., F. sporotrichioides Sherb. et F. poae (Peck) Wollenw., retrouvées dans 4,4 %, 3,3 % et 1,6 % des grains et représentant 39,3 %, 29,4 % et 14,2 % de la population pathogène de Fusarium, respectivement. Fusarium graminearum Schwabe et F. avenaceum (Fr.) Sacc. ont été retrouvées dans <1 % des grains et représentaient 8,3 % et 6,6 % de la population pathogène, respectivement. D’autres espèces, y compris F. acuminatum Ellis & Everh., F. culmorum (W.G. Sm.) Sacc. et F. semitectum Berk. & Rav., étaient présentes dans seulement 0,2 % des grains et représentaient <2 % de la population. Le taux d’incidence de toutes les espèces de Fusarium augmentait de 6,9 à 13,9 % lorsque la récolte était retardée. Chez les espèces les plus souvent retrouvées, seuls les taux de F. avenaceum et F. sporotrichioides ont augmenté lorsqu’on retardait la récolte, alors que les autres espèces n’ont pas suivi de tendance claire. Les concentrations de DON dans les grains récoltés variaient entre 0,20 et 0,28 mg kg‑1 selon les cinq dates de récolte et n’étaient pas statistiquement différentes. Des différences significatives dans l’incidence de toutes les espèces de Fusar...

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Effect of harvest date on barley grain contamination with Fusarium spp. and deoxynivalenol in northeastern Ontario

Xue

Rowsell²,

et al. 2013

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“…These isolates were recovered from wheat, and selected based on their pathogenicity on barley and wheat (Xue et al 2004(Xue et al , 2006 and had been used previously for inoculation in the FHB nursery in Ottawa to screen oat lines for resistance to FHB (Yan et al 2010). Four Fusarium spp.…”

Section: Pathogen Species and Inoculum Productionmentioning

confidence: 99%

“…Among these species, F. graminearum is the principal causal agent of FHB in Canada (Clear et al 1996(Clear et al , 2000Tekauz et al 2008Tekauz et al , 2011. Studies on the pathogenicity of these Fusarium species to wheat and barley revealed that only F. graminearum and F. culmorum were highly pathogenic, and the other species were intermediate or weakly pathogenic (Wong et al 1995;Stack et al 1997;Xue et al 2004Xue et al , 2006. There has been no study on the comparative pathogenicity of Fusarium species causing head blight on oat.…”

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Timing of inoculation andFusariumspecies affect the severity of Fusarium head blight on oat

et al. 2015

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. 2015. Timing of inoculation and Fusarium species affect the severity of Fusarium head blight on oat. Can. J. Plant Sci. 95: 517Á524. The influence of timing of inoculation and pathogenicity of four Fusarium spp. (F. culmorum, F. graminearum, F. sporotrichioides, and F. avenaceum) causing Fusarium head blight (FHB) were examined on 12 oat genotypes under controlled environmental conditions in two separate sets of experiments. In the first set, early inoculations with F. graminearum at or before the complete emergence of ears resulted in little or no visible FHB symptoms but deoxynivalenol (DON) contents ranging from 0.4 to 2.6 ppm were detected in the harvested grain. Severe levels of FHB were observed on these genotypes with infected spikelets ranging from 30 to 74% and DON concentrations, from 6.6 to 10.0 ppm, when plants were inoculated at or after the 50% anthesis stage. Inoculation at 50% anthesis was considered the most appropriate as it allowed sufficient time for disease development and assessment prior to the physiological maturity of the plants. In the second set of experiments, F. culmorum and F. graminearum were equally highly pathogenic, having areas under the disease progress curve of 45.3 and 47.3, respectively. Fusarium sporotrichioides was significantly less pathogenic than the two highly pathogenic species. The pathogenicity of F. avenaceum was intermediate and was not significantly different from those of either the highly pathogenic or the weakly pathogenic Fusarium species.

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“…The barley in each pan was subsequently inoculated with one of three FG isolates (99E3, 00S-130 or 00S-131; A. Tekauz, Cereals Research Centre, Winnipeg, MB). For inoculation, each isolate was established using the method of Xue et al (2006). Cultures were incubated for 7 d at 22Á258C, under mixed UV and fluorescent lighting on a 12-h light/dark cycle.…”

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Effects of ruminal fermentation, intestinal digestion and fecal contact on the survival of Fusarium graminearum on colonized barley grain

Wang¹,

McLaren²,

Scott³

et al. 2008

Can. J. Plant Sci.

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. 2008. Effects of ruminal fermentation, intestinal digestion and fecal contact on the survival of Fusarium graminearum on colonized barley grain. Can. J. Plant Sci. 88: 143Á146. Barley grains were colonized in the laboratory with a mixture of three Fusarium graminearum (FG) strains and processed in five different ways. The survivability of FG on the surface of barley kernels in the rumen, lower digestive tract and after contact with feces was investigated. FG-colonized kernels were placed in nylon bags and incubated in the rumen of three steers for 0, 6, 12 and 24 h. Viability of FG was reduced (P B0.001) after 6 h and FG was non-viable after 12 h in the rumen. To investigate viability in the lower digestive tract, FG-colonized kernels were placed in nylon bags, passed through the duodenum of three cows and recovered in the feces. No viable FG was found in any of the kernels that passed through the lower digestive tract. FG-colonized kernels were also embedded in cattle feces for 0, 2, 4, 7, 14 and 21 d. FG viability was reduced (PB0.001) after 2 d and was not detected after 4 d of contact with feces. The likelihood of FG remaining viable after passage through the intestinal tract and excretion in the feces of cattle is exceedingly low. Ensuite ils ont e´tudie´la survie de FG a`la surface des grains dans le rumen, la partie infe´rieure du syste`me digestif et apre`s contact avec les fe`ces. Les grains colonise´s par FG ont e´te´place´s dans des sacs en nylon puis incube´s 0, 6, 12 et 24 h dans le rumen de trois bouvillons. La viabilite´de FG diminue (PB0,001) apre`s 6 h d'incubation et disparaıˆt 12 h plus tard dans le rumen. Pour ve´rifier la viabilite´dans la partie infe´rieure du syste`me digestif, les auteurs ont place´les grains colonise´s par FG dans des sacs en nylon qu'ils ont fait passer dans le duode´num de trois vaches avant de les re´cupe´rer dans les fe`ces. Aucun des grains traite´s de cette manie`re ne portait de FG viable. Les grains colonise´s par FG ont aussi e´te´plonge´s dans des fe`ces de bovins pendant 0, 2, 4, 7, 14 et 21 j. La viabilite´de FG diminue (PB0,001) au bout de deux jours et disparaıˆt apre`s 4 j de contact avec les matie`res fe´cales. La probabilite´que FG demeure viable apre`s avoir traverse´le tube digestif des bovins et eˆtre excre´te´dans les fe`ces est extreˆmement faible.

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Pathogenicity of Fusarium species causing head blight in barley

Cited by 37 publications

References 23 publications

Effect of harvest date on barley grain contamination with Fusarium spp. and deoxynivalenol in northeastern Ontario

Effect of harvest date on barley grain contamination with Fusarium spp. and deoxynivalenol in northeastern Ontario

Timing of inoculation andFusariumspecies affect the severity of Fusarium head blight on oat

Effects of ruminal fermentation, intestinal digestion and fecal contact on the survival of Fusarium graminearum on colonized barley grain

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