Comparative Morphology and Survival of Chlamydospores of<i>Fusarium roseum</i>'Culmorum' and 'Graminearum'

Sitton, J. W.

doi:10.1094/phyto-71-85

Cited by 34 publications

(23 citation statements)

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“…F. pseudograminearum survives the summers as mycelium in plant residue, and spores are considered unimportant as an inoculum source (Wearing and Burgess 1977). On the other hand, F. culmorum can also survive as soilborne chlamydospores (Sitton and Cook 1981). Spores of F. culmorum can be dispersed by rainsplash and nodal infection by airborne inoculum of this species is common in some environments .…”

Section: Discussionmentioning

confidence: 99%

Survey of Fusarium species associated with crown rot of wheat and barley in eastern Australia

Backhouse

Abubakar

Burgess

et al. 2004

Austral. Plant Pathol.

134

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Section: Discussionmentioning

confidence: 99%

Survey of Fusarium species associated with crown rot of wheat and barley in eastern Australia

Backhouse

Abubakar

Burgess

et al. 2004

Austral. Plant Pathol.

134

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“…Others, e.g. F. culmorum produce thick-walled chlamydospores that can persist for years in soil (Sitton and Cook, 1981). Fusarium survives saprotrophically on crop residues in the field and can infect the following crop (Champeil et al, 2004;Parry et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Agricultural factors affecting Fusarium communities in wheat kernels

Karlsson

Friberg

Kolseth

et al. 2017

International Journal of Food Microbiology

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Fusarium head blight (FHB) is a devastating disease of cereals caused by Fusarium fungi. The disease is of great economic importance especially owing to reduced grain quality due to contamination by a range of mycotoxins produced by Fusarium. Disease control and prediction is difficult because of the many Fusarium species associated with FHB. Different species may respond differently to control methods and can have both competitive and synergistic interactions. Therefore, it is important to understand how agricultural practices affect Fusarium at the community level.Lower levels of Fusarium mycotoxin contamination of organically produced cereals compared with conventionally produced have been reported, but the causes of these differences are not well understood. The aim of our study was to investigate the effect of agricultural factors on Fusarium abundance and community composition in different cropping systems. Winter wheat kernels were collected from 18 organically and conventionally cultivated fields in Sweden, paired based on their geographical distance and the wheat cultivar grown. We characterised the Fusarium community in harvested wheat kernels using 454 sequencing of translation elongation factor 1-a amplicons. In addition, we quantified Fusarium spp. using real-time PCR to reveal differences in biomass between fields.We identified 12 Fusarium operational taxonomic units (OTUs) with a median of 4.5 OTUs per field. Fusarium graminearum was the most abundant species, while F. avenaceum had the highest occurrence. The abundance of Fusarium spp. ranged two orders of magnitude between fields. Two pairs of Fusarium species co-occurred between fields: F. poae with F. tricinctum and F. culmorum with F. sporotrichoides. We could not detect any difference in Fusarium communities between the organic and conventional systems. However, agricultural intensity, measured as the number of pesticide applications and the amount of nitrogen fertiliser applied, had an impact on Fusarium communities, specifically increasing the abundance of F. tricinctum. There were geographical differences in the Fusarium community composition where F. graminearum was more abundant in the western part of Sweden. The application of amplicon sequencing provided a comprehensive view of the Fusarium community in cereals. This gives us better opportunities to understand the ecology of Fusarium spp., which is important in order to limit FHB and mycotoxin contamination in cereals.

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“…FHB is a complex disease that often involves more than one host species and has been associated with 17 different species of Fusarium (Parry et al 1995). Fusarium graminearum is the primary causal agent of FHB in the midwestern United States, and worldwide (Sitton and Cook 1981). Infection by F. graminearum causes necrosis of florets that gives the head a "scabby" appearance, and results in moderate to severe reductions in grain yield (reviewed in Sutton 1982;Bai and Shaner 1994).…”

Section: Introductionmentioning

confidence: 99%

Engineering deoxynivalenol metabolism in wheat through the expression of a fungal trichothecene acetyltransferase gene

Okubara

Blechl²,

McCormick³

et al. 2002

Theor Appl Genet

119

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Fusarium head blight occurs in cereals throughout the world and is especially important in humid growing regions. Fusarium head blight (FHB) has re-emerged as a major disease of wheat and barley in the U.S. and Canada since 1993. The primary causal agents of FHB, Fusarium graminearum and Fusarium culmorum, can produce deoxynivalenol (DON), a trichothecene mycotoxin that enhances disease severity and poses a health hazard to humans and monogastric animals. To reduce the effects of DON on wheat, we have introduced FsTRI101, a Fusarium sporotrichioides gene formerly known as TriR, into the regenerable cultivar Bobwhite. TRI101 encodes an enzyme that transfers an acetyl moiety to the C3 hydroxyl group of trichothecenes. Four different transgenic plants carrying the FsTRI101 gene were identified. Although expression levels varied among the four lines, all of them accumulated FsTRI101 transcripts in endosperm and glume. TRI101-encoded acetyltransferase activity was detected in endosperm extracts of a single plant that accumulated FsTRI101 mRNA. Greenhouse resistance tests indicated that the accumulation of FsTRI101-encoded acetyltransferase in this plant confers partial protection against the spread of F. graminearum in inoculated wheat heads (spikes).

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Comparative Morphology and Survival of Chlamydospores ofFusarium roseum'Culmorum' and 'Graminearum'

Cited by 34 publications

References 0 publications

Survey of Fusarium species associated with crown rot of wheat and barley in eastern Australia

Survey of Fusarium species associated with crown rot of wheat and barley in eastern Australia

Agricultural factors affecting Fusarium communities in wheat kernels

Engineering deoxynivalenol metabolism in wheat through the expression of a fungal trichothecene acetyltransferase gene

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