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Clement, John A.; Parry, D. W.

doi:10.1023/a:1008681618351

Cited by 42 publications

(7 citation statements)

References 12 publications

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“…For both temperature experiments, stem colonisation decreased with increasing node number. This is in line with Clement and Parry (1998) and adds to the evidence that splashdispersal is required for longer-distance dispersal. No obvious effect of seedling blight severity on stembase disease incidence was observed, but M. nivale was consistently isolated from higher nodes of plants from heavily diseased seedlings.…”

Section: Discussionsupporting

confidence: 89%

“…This suggests there are significant differences between M. majus and M. nivale with respect to their competitive abilities, and further work is required to determine how additional factors such as inoculum sources affect their incidence and severity on stembases of winter wheat crops. Hutcheon and Jordan (1992) and Clement and Parry (1998) have demonstrated that M. nivale foot rot can lead to stem colonisation. Although the results reported here are not directly comparable to previous work due to the different inoculum sources employed, stem colonisation was similar to that reported by Clement and Parry (1998) under conditions precluding splash-dispersal.…”

Section: Discussionmentioning

confidence: 99%

“…Hutcheon and Jordan (1992) and Clement and Parry (1998) have demonstrated that M. nivale foot rot can lead to stem colonisation. Although the results reported here are not directly comparable to previous work due to the different inoculum sources employed, stem colonisation was similar to that reported by Clement and Parry (1998) under conditions precluding splash-dispersal. In this investigation, seedling blight was not a prerequisite for subsequent stem-base infection implying seed-borne inoculum alone is capable of causing stem-base disease in the absence of competing soil-borne pathogens.…”

Section: Discussionmentioning

confidence: 99%

“…Splash-dispersal of Fusarium spp. conidia from infected winter wheat stem-bases can cause ear blight (Jenkinson and Parry 1994) whilst Clement and Parry (1998) demonstrated that F. culmorum, F. graminearum and M. nivale could systemically colonise winter wheat stems from soil-borne inoculum. The possible link between seedling blight and foot rot, and the link between foot rot and ear blight, means that it may be possible to reduce the incidence of ear blight by effectively reducing seedling blight and stem-base inoculum through the use of seed treatments.…”

mentioning

confidence: 99%

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The effect of a mixture of seed-borne Microdochium nivale var. majus and Microdochium nivale var. nivale infection on Fusarium seedling blight severity and subsequent stem colonisation and growth of winter wheat in pot experiments

Haigh

Jenkinson²,

Hare

2008

Eur J Plant Pathol

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Greenhouse experiments were conducted in order to determine the impact of seed-borne Microdochium nivale var. nivale and var. majus inoculum, and seed treatment with a carboxin+thiram mixture, on the development of seedling blight, and on subsequent stem colonisation and growth of winter wheat (cv. Cadenza). Experiments were conducted at temperatures favourable (3°C) and unfavourable (22°C) to M. nivale. Seed-borne inoculum resulted in seedling blight symptom development when plants were grown at 3°C, but not when plants were grown at 22°C. For seedlings grown at 3°C, plants arising from heavily blighted seedlings developed more severe symptoms of stem colonisation, when compared with those arising from seedlings from carboxin+thiram treated seeds. In addition, the vigour of such plants (assessed by determining the number of tillers and ears per plant, stem length, green leaf area, dry weight and yield) was also significantly lower than for plants arising from carboxin+thiram treated seeds. Microdochium nivale var. majus and var. nivale appeared to have little effect on plant vigour from seedlings grown at 22°C. This is the first recorded incidence of seedling blight affecting subsequent plant growth. Microdochium nivale var. majus and var. nivale stem colonisation increased from growth stage (GS) 40-49 to harvest in plants raised from seedlings grown at both temperatures. Microdochium nivale var. majus and var. nivale were isolated from the second node at GS 40-49 and the third node at harvest of plants from seedlings grown at 3°C. For plants from seedlings raised at 22°C, M. nivale var. majus and var. nivale were isolated from the first node at GS 40-49 and the second node at harvest. Carboxin+thiram seed treatment decreased the extent and severity of stem colonisation on plants from seedlings grown at 22°C.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

The effect of a mixture of seed-borne Microdochium nivale var. majus and Microdochium nivale var. nivale infection on Fusarium seedling blight severity and subsequent stem colonisation and growth of winter wheat in pot experiments

Haigh

Jenkinson²,

Hare

2008

Eur J Plant Pathol

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“…Fusarium graminearum transmission from seeds to plants was previously reported in winter wheat by Duthie and Hall [9], who limited their study to the stems without analyzing the heads. On the other hand, studies investigating in wheat the F. culmorum or F. graminearum colonization process, from artificially inoculated seeds/crowns up to the heads, showed conflicting results [6,7,8,10,11]. Clement and Parry [10] demonstrated the presence of F. culmorum hyphae in the vascular system in part of wheat plants far from the point of inoculation.…”

Section: Resultsmentioning

confidence: 99%

Systemic Growth of F. graminearum in Wheat Plants and Related Accumulation of Deoxynivalenol

Moretti

Panzarini

Somma

et al. 2014

Toxins

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Fusarium head blight (FHB) is an important disease of wheat worldwide caused mainly by Fusarium graminearum (syn. Gibberella zeae). This fungus can be highly aggressive and can produce several mycotoxins such as deoxynivalenol (DON), a well known harmful metabolite for humans, animals, and plants. The fungus can survive overwinter on wheat residues and on the soil, and can usually attack the wheat plant at their point of flowering, being able to infect the heads and to contaminate the kernels at the maturity. Contaminated kernels can be sometimes used as seeds for the cultivation of the following year. Poor knowledge on the ability of the strains of F. graminearum occurring on wheat seeds to be transmitted to the plant and to contribute to the final DON contamination of kernels is available. Therefore, this study had the goals of evaluating: (a) the capability of F. graminearum causing FHB of wheat to be transmitted from the seeds or soil to the kernels at maturity and the progress of the fungus within the plant at different growth stages; (b) the levels of DON contamination in both plant tissues and kernels. The study has been carried out for two years in a climatic chamber. The F. gramineraum strain selected for the inoculation was followed within the plant by using Vegetative Compatibility technique, and quantified by Real-Time PCR. Chemical analyses of DON were carried out by using immunoaffinity cleanup and HPLC/UV/DAD. The study showed that F. graminearum originated from seeds or soil can grow systemically in the plant tissues, with the exception of kernels and heads. There seems to be a barrier that inhibits the colonization of the heads by the fungus. High levels of DON and F. graminearum were found in crowns, stems, and straw, whereas low levels of DON and no detectable levels of F. graminearum were found in both heads and kernels. Finally, in all parts of the plant (heads, crowns, and stems at milk and vitreous ripening stages, and straw at vitreous ripening), also the accumulation of significant quantities of DON-3-glucoside (DON-3G), a product of DON glycosylation, was detected, with decreasing levels in straw, crown, stems and kernels. The presence of DON and DON-3G in heads and kernels without the occurrence of F. graminearum may be explained by their water solubility that could facilitate their translocation from stem to heads and kernels. The presence of DON-3G at levels 23 times higher than DON in the heads at milk stage without the occurrence of F. graminearum may indicate that an active glycosylation of DON also occurs in the head tissues. Finally, the high levels of DON accumulated in straws are worrisome since they represent additional sources of mycotoxin for livestock.

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Contribution of cell wall degrading enzymes to pathogenesis of Fusarium graminearum: a review

Kikot

Hours

Alconada

2009

J. Basic Microbiol.

207

140

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Plant-pathogenic fungi produce an array of extracellular hydrolytic enzymes that enable them to penetrate and infect the host tissue; these enzymes are collectively called cell wall-degrading enzymes (CWDE). They may contribute to pathogenesis by degrading wax, cuticle and cell walls, thus aiding tissue invasion and pathogen dissemination. Furthermore, they can act as elicitors of host defense reaction.Fusarium head blight (FHB) is a disease caused principally by Fusarium graminearum on crops, occurring all over the world. Important economic losses on wheat-growing areas have been registered by altering quality parameters of grains. Significant progress has been made in understanding the infection process from F. graminearum on wheat, based on genomic technologies. The virulence degree of this phytopathogen on crops could arise from differences in the production of extracellular enzymes, factors controlling the establishment of infection.Fusarium graminearum isolates from different geographical areas have been examined, and a combination of morphological and molecular data allowed the division of fungi in diverse groups, which have been related to the variation in pathogenicity. In most studied cases there is a correlation between the presence of pectic enzymes, disease symptom and virulence, being also their production decisive in the infection process.

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Untitled

Cited by 42 publications

References 12 publications

The effect of a mixture of seed-borne Microdochium nivale var. majus and Microdochium nivale var. nivale infection on Fusarium seedling blight severity and subsequent stem colonisation and growth of winter wheat in pot experiments

The effect of a mixture of seed-borne Microdochium nivale var. majus and Microdochium nivale var. nivale infection on Fusarium seedling blight severity and subsequent stem colonisation and growth of winter wheat in pot experiments

Systemic Growth of F. graminearum in Wheat Plants and Related Accumulation of Deoxynivalenol

Contribution of cell wall degrading enzymes to pathogenesis of Fusarium graminearum: a review

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