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41 results for “Aspergillus flavus”
Figs 1, 2. Aspergillus flavus. 1 in Symptomatology of termite Coptotermes curvignathus Holmgren (Rhinotermitidae) after fungi infection of Aspergillus flavus
Figs 1, 2. Aspergillus flavus. 1 – colony on Potato Dextrose Agar (PDA); 2 – morphology of conidia: (1) vesicles; (2) metula; (3) fialid; (4) conidiospores; (5) conidiophore.
Figs 3–6 in Symptomatology of termite Coptotermes curvignathus Holmgren (Rhinotermitidae) after fungi infection of Aspergillus flavus
Figs 3–6. Body surface morphology of Coptotermes curvignathus infected with Aspergillus flavus. 3 – negative control; 4 – 1st day after application; 5 – 3rd day; 6 – 7th day.
Figs 3–6 in Symptomatology of termite Coptotermes curvignathus Holmgren (Rhinotermitidae) after fungi infection of Aspergillus flavus
Figs 3–6. Body surface morphology of Coptotermes curvignathus infected with Aspergillus
Figs 1, 2. Aspergillus flavus. 1 in Symptomatology of termite Coptotermes curvignathus Holmgren (Rhinotermitidae) after fungi infection of Aspergillus flavus
Figs 1, 2. Aspergillus flavus. 1 – colony on Potato Dextrose Agar (PDA); 2 –
Cold atmospheric plasma improves antifungal responsiveness of Aspergillus flavus and Fusarium keratoplasticum conidia and mycelia
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Aspergillus flavus germination, ex vivo
<p>Time-lapse imaging showing intrastromal germination of Aspergillus flavus conidia following intrastromal injection into a porcine cornea. Conidial germination and hyphal elongation can be observed by sixteen hours post-inoculation. </p>
Data from: Phase-dependent differential in vitro and ex vivo susceptibility of Aspergillus flavus and Fusarium keratoplasticum to azole antifungals
<p>Fungal keratitis (FK) is an invasive infection of the cornea primarily associated with <em>Aspergillus</em> and <em>Fusarium</em> species. FK is treated empirically with a limited selection of topical antifungals with varying levels of success. Though clinical infections are typically characterized by a dense network of mature mycelium, traditional models used to test antifungal susceptibility of FK isolates exclusively evaluate susceptibility in fungal cultures derived from asexual spores known as conidia. The purpose of this study was to characterize differences in fungal response when topical antifungal treatment is initiated at progressive phases of fungal development. We compared efficacy of voriconazole and luliconazole against <em>in vitro</em> cultures of <em>A. flavus</em> and <em>F. keratoplasticum</em> at 0, 24, and 48 h of fungal development. Data from this assay is included here, reported as end-point absorbance values. A porcine cadaver corneal model was used to compare antifungal efficacy of voriconazole and luliconazole in <em>ex vivo</em> tissue cultures of <em>A. flavus</em> and <em>F. keratoplasticum</em> at 0, 24, and 48 h of fungal development. Data from this assay may be found here, reported as pixel counts of the determined area.</p>
Data from: Phase-dependent differential in vitro and ex vivo susceptibility of Aspergillus flavus and Fusarium keratoplasticum to azole antifungals
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Data from: Balancing selection for aflatoxin in Aspergillus flavus is maintained through interference competition with, and fungivory by insects
The role of microbial secondary metabolites in the ecology of the organisms that produce them remains poorly understood. Variation in aflatoxin production by Aspergillus flavus is maintained by balancing selection, but the ecological function and impact on fungal fitness of this compound are unknown. We hypothesize that balancing selection for aflatoxin production in A. flavus is driven by interaction with insects. To test this, we competed naturally occurring aflatoxigenic and non-aflatoxigenic fungal isolates against Drosophila larvae on medium containing 0–1750 ppb aflatoxin, using quantitative PCR to quantify A. flavus DNA as a proxy for fungal fitness. The addition of aflatoxin across this range resulted in a 26-fold increase in fungal fitness. With no added toxin, aflatoxigenic isolates caused higher mortality of Drosophila larvae and had slightly higher fitness than non-aflatoxigenic isolates. Additionally, aflatoxin production increased an average of 1.5-fold in the presence of a single larva and nearly threefold when the fungus was mechanically damaged. We argue that the role of aflatoxin in protection from fungivory is inextricably linked to its role in interference competition. Our results, to our knowledge, provide the first clear evidence of a fitness advantage conferred to A. flavus by aflatoxin when interacting with insects.
Data from: Sexual reproduction in Aspergillus flavus sclerotia: acquisition of novel alleles from soil populations and uniparental mitochondrial inheritance
Aspergillus flavus colonizes agricultural commodities worldwide and contaminates them with carcinogenic aflatoxins. The high genetic diversity of A. flavus populations is largely due to sexual reproduction characterized by the formation of ascospore-bearing ascocarps embedded within sclerotia. A. flavus is heterothallic and laboratory crosses between strains of the opposite mating type produce progeny showing genetic recombination. Sclerotia formed in crops are dispersed onto the soil surface at harvest and are predominantly produced by single strains of one mating type. Less commonly, sclerotia may be fertilized during co-infection of crops with sexually compatible strains. In this study, laboratory and field experiments were performed to examine sexual reproduction in single-strain and fertilized sclerotia following exposure of sclerotia to natural fungal populations in soil. Female and male roles and mitochondrial inheritance in A. flavus were also examined through reciprocal crosses between sclerotia and conidia. Single-strain sclerotia produced ascospores on soil and progeny showed biparental inheritance that included novel alleles originating from fertilization by native soil strains. Sclerotia fertilized in the laboratory and applied to soil before ascocarp formation also produced ascospores with evidence of recombination in progeny, but only known parental alleles were detected. In reciprocal crosses, sclerotia and conidia from both strains functioned as female and male, respectively, indicating A. flavus is hermaphroditic, although the degree of fertility depended upon the parental sources of sclerotia and conidia. All progeny showed maternal inheritance of mitochondria from the sclerotia. Compared to A. flavus populations in crops, soil populations would provide a higher likelihood of exposure of sclerotia to sexually compatible strains and a more diverse source of genetic material for outcrossing.
Data from: Balancing selection for aflatoxin in Aspergillus flavus is maintained through interference competition with, and fungivory by insects
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Data from: Sexual reproduction in Aspergillus flavus sclerotia: acquisition of novel alleles from soil populations and uniparental mitochondrial inheritance
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Genes Differentially Expressed by Aspergillus flavus Strains After Loss of Aflatoxin Production by Serial Transfers
GEO Series GSE8185. Aspergillus flavus. 12 samples. Type: Expression profiling by array.
The COMPASS subunit Bre2 targets CRF Arp9 to regulate the bio-synthesis of secondary metabolite AFB1 and virulence in Aspergillus flavus [ATAC-seq]
GEO Series GSE285953. Aspergillus flavus. 4 samples. Type: Genome binding/occupancy profiling by high throughput sequencing.
SntB triggers the antioxidant pathways to regulate development and aflatoxin biosynthesis in Aspergillus flavus
GEO Series GSE247683. Aspergillus flavus. 14 samples. Type: Expression profiling by high throughput sequencing; Genome binding/occupancy profiling by high throughput sequencing.
Transcriptomic analysis of Aspergillus flavus and its ASPES transcription factor deletion strains
GEO Series GSE107025. Aspergillus flavus. 12 samples. Type: Expression profiling by high throughput sequencing.
Bisulfite Sequencing Reveals that Aspergillus flavus Holds A Hollow in DNA Methylation
GEO Series GSE32177. Aspergillus flavus. 2 samples. Type: Methylation profiling by high throughput sequencing.
Transcriptomic profiling of Aspergillus flavus in response to 5-azacytidine & gallic acid
GEO Series GSE40202. Aspergillus flavus. 3 samples. Type: Expression profiling by high throughput sequencing.
Effect of Streptomyces roseolus cell free supernatant on fungal development, transcriptome and aflatoxin B1 production of Aspergillus flavus
GEO Series GSE232607. Aspergillus flavus; Penicillium expansum. 8 samples. Type: Expression profiling by array.
Aspergillus flavus transcriptome under different temperature conditions
GEO Series GSE30031. Aspergillus flavus. 2 samples. Type: Expression profiling by high throughput sequencing.
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