Fusarium diseases in the tropics

Waller, J. M.; Brayford, D.

doi:10.1080/09670879009371470

Cited by 29 publications

(18 citation statements)

References 15 publications

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“…Corn, an essential component of animal feedstuffs, is constantly exposed to the risk of developing mycotoxigenic fungi (Waller and Brayford 1990, Bacon et al 1992, Zummo and Scott 1992. In the study reported here, emphasis is given to fumonisins, a group of mycotoxins isolated in 1988 from a culture of Fusarium moniliforme, a phytopathogen of worldwide occurrence in corn (Gelderblom et al 1988).…”

Section: Introductionmentioning

confidence: 93%

The natural occurrence of fumonisins in Brazilian corn kernels

Hirooka

Yamaguchi

Aoyama

et al. 1996

Food Additives and Contaminants

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Since animal intoxication related to corn-based feed is frequently observed in the State of Paraná, Brazil, natural contamination by fumonisins in 48 corn samples (39 from the State of Paraná, and 9 from the Brazilian tropical states, Mato Grosso do Sul and Goias) harvested in 1990-1991 was investigated, along with fungal flora. The total mould count ranged from 6.3 x 10(2) to 5.5 x 10(7) cfu/g, and Fusarium moniliforme and Aspergillus species belonging to section Flavi were detected in 41 and 33 samples, respectively. Regarding the samples from the State of Paraná, F. moniliforme was present in 33 samples at a count of 1.0 x 10(2) to 1.6 x 10(7) cfu/g and Aspergillus spp. in section Flavi in 27 samples at 1.0 x 10(2) to 1.0 x 10(6) cfu/g. HPLC analysis of fumonisins in the corn showed that fumonisins B1 (FB1) and B2 (FB2) were positive for 97.4% and 94.8% of samples respectively. All the corn from North Paraná was positive for fumonisins, with average FB1 levels of 4.79 micrograms/g and average FB2 levels of 3.95 micrograms/g: the Central-West region had average levels of 3.30 and 2.52 micrograms/g, and the Central-East had average of 3.25 and 2.34 micrograms/g, respectively. Except for one negative sample all the corn samples from the Central Region were positive for fumonisins, averaging FB1 levels being 5.45 micrograms/g and FB2 levels being 5.09 micrograms/g. Out of eight samples from the tropical state of Mato Grosso do Sul, F. moniliforme was detected in seven and Aspergillus spp. in section Flavi in five samples with average FB1 levels of 10.59 micrograms/g and average for FB2 levels of 10.31 micrograms/g. The samples from Goias were also contaminated with these two fungi, with the FB1 contamination being 5.83 and the FB2 contamination 3.62 micrograms/g.

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Section: Introductionmentioning

confidence: 93%

The natural occurrence of fumonisins in Brazilian corn kernels

Hirooka

Yamaguchi

Aoyama

et al. 1996

Food Additives and Contaminants

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“…Plant diseases caused by Fusarium spp. in the tropics are becoming more significant with the introduction of intensive and high-yielding production systems and genetically uniform cultivars (42,51). F. oxysporum and F. solani are the most common plant pathogens in this region.…”

Section: Differences In Identification Of Temperate and Tropical Speciesmentioning

confidence: 99%

A Utilitarian Approach to Fusarium Identification

2003

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“…Thirty-four endophytic strains were screened against the well known phytopathogen Gibberella fujikuroi . This phytopathogen devastates rice crops by causing ‘bakanae’ disease (from the Japanese ‘foolish seedling’), 6 a condition which results from over-production of the plant growth hormone gibberellic acid.…”

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confidence: 99%

Antifungal depsidone metabolites from Cordyceps dipterigena, an endophytic fungus antagonistic to the phytopathogen Gibberella fujikuroi

Varughese¹,

Ríos²,

Higginbotham³

et al. 2012

Tetrahedron Letters

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Among thirty four endophytic fungal strains screened for in vitro antagonism, the endophytic fungus Cordyceps dipterigena was found to strongly inhibit mycelial growth of the plant pathogenic fungus Gibberella fujikuroi. Two new depsidone metabolites, cordycepsidone A (1) and cordycepsidone B (2), were isolated from the PDA culture extract of C. dipterigena and identified as being responsible for the antifungal activity. Elucidation of their chemical structures was carried out using 1D and 2D NMR spectroscopy in combination with IR and MS spectroscopic data. Cordycepsidone A displayed strong and dose-dependent antifungal activity against the plant pathogenic fungus Gibberella fujikuroi. The isolates were inactive in bioassays for malaria (Plasmodium falciparum), leishmaniasis (Leishmania donovani), Chagas’s disease (Trypanosoma cruzi), and cytotoxicity at 10 μg/mL. The compounds were also found to be inactive against several bacterial strains at 50 μg/mL.

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Fusarium diseases in the tropics

Cited by 29 publications

References 15 publications

The natural occurrence of fumonisins in Brazilian corn kernels

The natural occurrence of fumonisins in Brazilian corn kernels

A Utilitarian Approach to Fusarium Identification

Antifungal depsidone metabolites from Cordyceps dipterigena, an endophytic fungus antagonistic to the phytopathogen Gibberella fujikuroi

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