Two new species ofFusarium: Fusarium brevicatenulatumfrom the noxious weedStriga asiaticain Madagascar andFusarium pseudoanthophilumfromZea maysin Zimbabwe

Nirenberg, Helgard I.; O’Donnell, Kerry; Kroschel, J.; Andrianaivo, Alain Paul; Frank, J.M.; Mubatanhema, Wellington

doi:10.1080/00275514.1998.12026930

Cited by 25 publications

(7 citation statements)

References 6 publications

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“…This association is consistent with placement in the African clade, although the strains used for the original descriptions were recovered from Striga asiatica in Madagascar and from maize kernels in Zimbabwe (Nirenberg et al 1998) respectively, which might or might not be interpreted for placement in an African clade.…”

Section: Phylogeography Of Plant Pathogenic Species Of Fusariumsupporting

confidence: 59%

“…Other exceptions to the O'Donnell et al biogeographic hypothesis include F. werrikimbe, F. succisae, F. bulbicola and F. sterilihyphosum, all of which are associated with hosts that have proposed geographic origins that are outside the area predicted by the clade they are associated with (Adams 1955;Britz et al 2002;Kvas et al 2009;Nirenberg and O'Donnell 1998;Walsh et al 2010). These exceptions have been attributed to anthropological dispersal of economically important plants and host jumps by the fungi (O'Donnell et al 1998a), but also may be an artefact of the small number of available isolates of these species, which may not accurately reflect the primary geographic range or the most important host substrate.…”

Section: Phylogeography Of Plant Pathogenic Species Of Fusariummentioning

confidence: 90%

“…Relying on too few isolates that are not representative has proven to be problematic. In the case of F. brevicatenulatum and F. pseudoanthophilum, the strains used for the initial species descriptions were small in number, two and four, and all from eastern Africa (Nirenberg et al 1998). No sexual stage was reported initially for either species.…”

Section: Species Concepts and Their Impact On Our Understanding Of Bimentioning

confidence: 98%

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Biogeography and phylogeography of Fusarium: a review

et al. 2010

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Fusarium is a large, complex genus that causes a wide variety of plant diseases, produces a number of mycotoxins and is becoming increasingly recognized as a significant human pathogen. These fungi occur in ecosystems in all parts of the globe, which makes them useful as a model to better understand biogeographic processes affecting the distribution of fungi. Here we review the information available on the biogeography of different species and clades of Fusarium and some of the likely processes affecting dispersal and speciation.

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Section: Phylogeography Of Plant Pathogenic Species Of Fusariumsupporting

confidence: 59%

Section: Phylogeography Of Plant Pathogenic Species Of Fusariummentioning

confidence: 90%

Section: Species Concepts and Their Impact On Our Understanding Of Bimentioning

confidence: 98%

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Biogeography and phylogeography of Fusarium: a review

et al. 2010

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“…Strains of F. nygamai parasitic to Striga asiatica were described as F. brevicatenulatum (53), and these strains of F. nygamai could belong to F. brevicatenulatum and not to F. nygamai. F. nygamai is not commonly regarded as an economically important plant pathogen, although it has been reported to cause reduction in levels of the parasitic weed Striga hermonthica in sorghum (4).…”

Section: Discussionmentioning

confidence: 99%

Toxicity, Pathogenicity, and Genetic Differentiation of Five Species of Fusarium from Sorghum and Millet

Leslie¹,

Zeller²,

Lamprecht³

et al. 2005

Phytopathology®

120

108

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Fusarium isolates recovered from sorghum and millet are commonly identified as F. moniliforme, but with the recognition of new species in this group, the strains given this name are being re-evaluated. We analyzed five strains each from five Fusarium species (F. andiyazi, F. nygamai, F. pseudonygamai, F. thapsinum, and F. verticillioides) often associated with sorghum and millet for their ability to produce fumonisin and moniliformin, their toxicity to ducklings, and their ability to cause disease on sorghum seedlings in vitro. These species can be distinguished with isozymes (fumarase, NADP-dependent isocitrate dehydrogenase, and malate dehydrogenase) and with banding patterns resulting from amplified fragment length polymorphisms. Two species, F. pseudonygamai and F. thapsinum, produced high levels of moniliformin, but little or no fumonisins, and were consistently highly toxigenic in the duckling tests. Two species, F. verticillioides and F. nygamai, produced high levels of fumonisins, but little or no moniliformin, and also were toxigenic in the duckling tests. F. andiyazi produced little or no toxin and was the least toxigenic in the duckling tests. In sorghum seedling pathogenicity tests, F. thapsinum was the most virulent followed by F. andiyazi, then F. verticillioides, and finally F. nygamai and F. pseudonygamai, which were similar to each other. Thus, these five species, which would once have all been called F. moniliforme, differ sufficiently in terms of plant pathogenicity and toxin production profile, that their previous misidentification could explain inconsistencies in the literature and differences observed by researchers who thought they were all working with the same fungal species.

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“…The development of a bioherbicide would be a complementary management tool in an integrated control approach, and different studies have been carried out to identify potential pathogens. Many species of fungi, particularly Fusarium spp., are common and widespread on S. hermonthica in Sudan, Ghana and Mali as well as on S. asiatica in Madagascar (Abbasher, 1994;Ciotola et al ., 1995;Nirenberg et al ., 1998). In pot and field experiments, it was shown that isolates of Fusarium nygamai Burgess & Trimboli collected from Sudan, as well as F. oxysporum Schlecht isolates from Ghana, have potential to effectively control S. hermonthica (Abbasher & Sauerborn, 1992;Kroschel et al ., 1996;Sauerborn et al ., 1996a).…”

Section: Introductionmentioning

confidence: 94%

Bioherbicidal effect of fumonisin B₁, a phytotoxic metabolite naturally produced byFusarium nygamai, on parasitic weeds of the genusStriga

Kroschel¹,

Elzein²

2004

Biocontrol Science and Technology

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Fusarium nygamai has been isolated and identified from diseased Striga hermonthica plants collected from sorghum fields in the Sudan. Fumonisin B 1 , produced by this fungus, was isolated and purified. In in vitro experiments, the bioherbicidal potential of this mycotoxin was evaluated against S. hermonthica and S. asiatica. Different concentrations (250, 500 and 1000 mg L (1 of water) of fumonisin B 1 , applied during the conditioning phase of the Striga seeds significantly reduced the germination of both species in a range of 19.8 Á/32.2 and 34.5 Á/47.6%, respectively. In addition, the length of the germ tubes was reduced and the germ tubes became brownish. Fumonisin B 1 slightly delayed the emergence of Striga when 250 mg fumonisin B 1 dissolved in 1 L of water were applied into the soil per pot before sowing sorghum. By the way of contrast, fumonisin B 1 was very phytotoxic when Striga seedlings (leaves and stems) of different heights and ages were sprayed with a concentration series of 250, 500 and 1000 mg fumonisin B 1 mL (1 until run-off, or when plants were injured with a scalpel before fumonisin B 1 was applied into the injury at concentrations of 250 and 500 mg mL (1 . One day after application, the plants showed symptoms of wilting, first at the top and then moving downwards. Leaves turned black and stems desiccated at the point of injuries. Within 4 days after the application, 55% of the plants tested were completely destroyed. In total, at the end of the experiment, 40 days after the treatment, 85% of the treated plants were killed by fumonisin B 1, regardless of the concentration applied and the application technique used.

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Two new species ofFusarium: Fusarium brevicatenulatumfrom the noxious weedStriga asiaticain Madagascar andFusarium pseudoanthophilumfromZea maysin Zimbabwe

Cited by 25 publications

References 6 publications

Biogeography and phylogeography of Fusarium: a review

Biogeography and phylogeography of Fusarium: a review

Toxicity, Pathogenicity, and Genetic Differentiation of Five Species of Fusarium from Sorghum and Millet

Bioherbicidal effect of fumonisin B₁, a phytotoxic metabolite naturally produced byFusarium nygamai, on parasitic weeds of the genusStriga

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Two new species ofFusarium: Fusarium brevicatenulatumfrom the noxious weedStriga asiaticain Madagascar andFusarium pseudoanthophilumfromZea maysin Zimbabwe

Cited by 25 publications

References 6 publications

Biogeography and phylogeography of Fusarium: a review

Biogeography and phylogeography of Fusarium: a review

Toxicity, Pathogenicity, and Genetic Differentiation of Five Species of Fusarium from Sorghum and Millet

Bioherbicidal effect of fumonisin B1, a phytotoxic metabolite naturally produced byFusarium nygamai, on parasitic weeds of the genusStriga

Contact Info

Product

Resources

About

Bioherbicidal effect of fumonisin B₁, a phytotoxic metabolite naturally produced byFusarium nygamai, on parasitic weeds of the genusStriga