Trichothecene inhibitors of Striga hermonthica germination produced by Fusarium solani

Sugimoto, Yukihiro; Ahmed, Nafisa E.; Yasuda, Norifumi; Inanaga, Shinobu

doi:10.1614/0043-1745(2002)050[0658:tioshg]2.0.co;2

Cited by 9 publications

(5 citation statements)

References 16 publications

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“…The inability to produce these toxins by the isolates of F. solani was consistant in all types of culture-media used including the YES-medium which is used by some workers for the production of trichothecenes in particular and some other Fusarium toxins (Krikštaponis et al, 2001;Cvetnić et al, 2005). These findings are in contrast to those of Sugimoto et al (2002) who isolated trichothecenes acuminatin, neosolaniol, 8-acetylneosolaniol, and tetraacetoxy T-2 tetrol (neosolaniol diacetate) from F. solani (SUD96), isolated from infected Striga plants in the Sudan. Such differences in mycotoxin production between different strains of the same species especially when collected from different locations are, however, expected (ApSimon et al, 1990).…”

Section: Discussioncontrasting

confidence: 99%

Mycotoxins produced by Fusarium spp. isolated from Striga hermonthica (Del.) Benth. in Sudan

Mohukker

Hetwer

Karlovský

2021

sjs

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isolates of F. solani and one isolate of each of F. oxysporum, F. nygamai, F. equiseti, and F. compactum were fully toxicologically characterized. These Fusaria were isolated from naturally infected Striga hermonthica plants collected from sorghum cultivations in central (Gezira), eastern (Gadarif), and southeastern Sudan (Damazin). HPLC/MS or HPLC/DAD system was used for the toxicological characterization of Fusarium spp. using nivalenol, deoxynivalenol, 3-acetyl deoxynivalenol, 15-Acetyl deoxynivalenol, fusarenon X, T2-toxin, HT-2 toxin, diacetoxyscirpenol, zearalenone, fumonisin B (B1 and B2), enniatin B, B1 and A and fusaric acid as toxin standards. The three isolates of F. solani produced none of the above toxins. Fusarium oxysporum and F. nygamai produced fusaric acid. Fusarium nygamai also produced fumonisns B1, B2, and B3. Fusarium equiseti produced nivalenol, fusarenon X, and diacetoxyscirpenol. Fusarium compactum produced nivalenol. This is the first report of nivalenol production by a strain of F. compactum. Non toxin-production by the three isolates of F. solani and production of only fusaric acid by F. oxysporum make them toxicologically safe for further evaluations as biocontrol agents for the witchweed.

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Section: Discussioncontrasting

confidence: 99%

Mycotoxins produced by Fusarium spp. isolated from Striga hermonthica (Del.) Benth. in Sudan

Mohukker

Hetwer

Karlovský

2021

sjs

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“…However, trichothecenes have not been reported from Neocosmospora or “ F. solani ” except from two isolates misidentified as “ F. solani” ( Ueno et al. 1972 , Sugimoto et al. 2002 ) ( Supplementary Table S2 )…”

Section: Secondary Metabolites Of Fusarioid Generamentioning

confidence: 99%

Fusarium: more than a node or a foot-shaped basal cell

Crous¹,

Lombard²,

Sandoval-Denis³

et al. 2021

Studies in Mycology

205

133

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Recent publications have argued that there are potentially serious consequences for researchers in recognising distinct genera in the terminal fusarioid clade of the family Nectriaceae . Thus, an alternate hypothesis, namely a very broad concept of the genus Fusarium was proposed. In doing so, however, a significant body of data that supports distinct genera in Nectriaceae based on morphology, biology, and phylogeny is disregarded. A DNA phylogeny based on 19 orthologous protein-coding genes was presented to support a very broad concept of Fusarium at the F1 node in Nectriaceae . Here, we demonstrate that re-analyses of this dataset show that all 19 genes support the F3 node that represents Fusarium sensu stricto as defined by F. sambucinum (sexual morph synonym Gibberella pulicaris ). The backbone of the phylogeny is resolved by the concatenated alignment, but only six of the 19 genes fully support the F1 node, representing the broad circumscription of Fusarium. Furthermore, a re-analysis of the concatenated dataset revealed alternate topologies in different phylogenetic algorithms, highlighting the deep divergence and unresolved placement of various Nectriaceae lineages proposed as members of Fusarium . Species of Fusarium s. str. are characterised by Gibberella sexual morphs, asexual morphs with thin- or thick-walled macroconidia that have variously shaped apical and basal cells, and trichothecene mycotoxin production, which separates them from other fusarioid genera. Here we show that the Wollenweber concept of Fusarium presently accounts for 20 segregate genera with clear-cut synapomorphic traits, and that fusarioid macroconidia represent a character that has been gained or lost multiple times throughout Nectriaceae . Thus, the very broad circumscription of Fusarium is blurry and without apparent synapomorphies, and does not include all genera with fusarium-like macroconidia, which are spread throughout Nectriaceae ( e.g. , Cosmosporella , Macroconia , Microcera ). In this study four new genera are introduced, along with 18 new species and 16 new combinations. These names convey information about relationships, morphology, and ecological preference that would otherwise be lost in a broader definition of Fusarium . To assist users to correctly identify fusarioid genera and species, we introduce a new online identification database, Fusarioid-ID, accessible at www.fusarium.org . The database comprises partial sequences from multiple genes commonly used to identify fusarioid taxa ( ...

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“…The indirect effect of Fusarium could be through reduction of Striga infestation. In addition the fungus may directly stimulate plant growth (Sugimoto et al, 2002). The present data demonstrated that the application of F. oxysporum was able to reduce the number of Striga plants by 92.52% by attacking the parasite at its different growth stages before emergence as well as before flowering.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Sorghum Genotypes Compatibility with Fusarium oxysporum under Striga Infestation

et al. 2013

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Combined use of host resistance and Fusarium oxysporum as a biocontrol agent may provide enhanced management of Striga hermonthica (Delile) Benth. in sorghum [Sorghum bicolor (L.) Moench]. The objective of this study was to identify sorghum genotypes compatible with F. oxysporum and to determine the potential of this biocontrol agent for controlling Striga. Fifty sorghum genotypes were evaluated in the greenhouse in Striga‐infested soils with and without inoculation by F. oxysporum. A supplementary laboratory study was conducted to investigate the growth and proliferation of F. oxysporum in the soil and sorghum roots. Data were recorded on crop growth parameters, Striga incidence and colonization, and the persistence of F. oxysporum in the soil and on plant roots, using samples taken at 45 and 60 d after planting. Inoculation with F. oxysporum significantly shortened days to maturity compared to noninoculated plants. Plant height, biomass, panicle length, and seed yield per plant were higher in F. oxysporum treated pots. Striga emergence was delayed and vigor and overall incidence of the parasite was significantly reduced in Fusarium‐treated pots. The number of Fusarium colony forming units obtained from soil and plant samples were significantly different between genotypes. Three principal components (PCs) contributed to 67.31% of the total variation among the genotypes. Principal component 1, PC2, and PC3 contributed 27, 23, and 18%, respectively, to the total variance. Days to Striga emergence and Striga count and height correlated with PC1 while sorghum panicle length and plant height with PC2 and days to sorghum flowering and maturity with PC3. Thus, 12 promising sorghum lines were identified with farmer‐preferred agronomic traits and with F. oxysporum compatibility. This result is valuable in the development of Striga control in sorghum through integration of host resistance and F. oxysporum inoculation.

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Trichothecene inhibitors of Striga hermonthica germination produced by Fusarium solani

Cited by 9 publications

References 16 publications

Mycotoxins produced by Fusarium spp. isolated from Striga hermonthica (Del.) Benth. in Sudan

Mycotoxins produced by Fusarium spp. isolated from Striga hermonthica (Del.) Benth. in Sudan

Fusarium: more than a node or a foot-shaped basal cell

Evaluation of Sorghum Genotypes Compatibility with Fusarium oxysporum under Striga Infestation

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