Intraspecific Growth and Aflatoxin Inhibition Responses to Atoxigenic : Evidence of Secreted, Inhibitory Substances in Biocontrol.

The fungus infects corn, peanut, and cottonseed, and contaminates seeds with acutely poisonous and carcinogenic aflatoxin. Aflatoxin contamination is a perennial threat in tropical and subtropical climates. Nonaflatoxin-producing isolates (atoxigenic) are deployed in fields to mitigate aflatoxin contamination.

Genetic Responses and Aflatoxin Inhibition during Co-Culture of Aflatoxigenic and Non-Aflatoxigenic .

Aflatoxin is a carcinogenic mycotoxin produced by . Non-aflatoxigenic (Non-tox) isolates are deployed in corn fields as biocontrol because they substantially reduce aflatoxin contamination via direct replacement and additionally via direct contact or touch with toxigenic (Tox) isolates and secretion of inhibitory/degradative chemicals. To understand touch inhibition, HPLC analysis and RNA sequencing examined aflatoxin production and gene expression of Non-tox isolate 17 and Tox isolate 53 mono-cultures and during their interaction in co-culture.

Influence of Neighboring Clonal-Colonies on Aflatoxin Production by .

is an ascomycete fungus that infects and contaminates corn, peanuts, cottonseed, and treenuts with acutely toxic and carcinogenic aflatoxins. The ecological function of aflatoxin production is not well understood; though not phytotoxic, aflatoxin may be involved in resisting oxidative stress responses from infection or drought stress in plants. Observation of aflatoxin stimulation in 48-well plates in response to increasing inoculated wells sparked an investigation to determine if volatiles influence aflatoxin production in neighboring colonies.

Cyclopiazonic Acid Is a Pathogenicity Factor for Aspergillus flavus and a Promising Target for Screening Germplasm for Ear Rot Resistance.

Aspergillus flavus, an opportunistic pathogen, contaminates maize and other key crops with carcinogenic aflatoxins (AFs). Besides AFs, A. flavus makes many more secondary metabolites (SMs) whose toxicity in insects or vertebrates has been studied.

Surface association and uptake of poly(lactic-co-glycolic) acid nanoparticles by Aspergillus flavus.

Aim: To study the interaction of fluorescently tagged nanoparticles with Aspergillus flavus.

Materials & Methods: Covalently tagged poly(lactic-co-glycolic) acid (PLGA) nanoparticles (PLGA-tetramethylrhodamine [PLGA-TRITC]), and PLGA-TRITC with entrapped coumarin-6 (double-tagged) nanoparticles, were synthesized using an oil-in-water emulsion evaporation method. Nanoparticle interaction with A.

Intraspecific aflatoxin inhibition in Aspergillus flavus is thigmoregulated, independent of vegetative compatibility group and is strain dependent.

Biological control of preharvest aflatoxin contamination by atoxigenic stains of Aspergillus flavus has been demonstrated in several crops. The assumption is that some form of competition suppresses the fungus's ability to infect or produce aflatoxin when challenged. Intraspecific aflatoxin inhibition was demonstrated by others.

Comparison of soil and corn kernel Aspergillus flavus populations: evidence for niche specialization.

Aspergillus flavus is considered a generalist-opportunistic pathogen, but studies are beginning to show that A. flavus populations have strains specific to various hosts. The research objective was to determine whether A.

PR10 expression in maize and its effect on host resistance against Aspergillus flavus infection and aflatoxin production.

Maize (Zea mays L.) is a major crop susceptible to Aspergillus flavus infection and subsequent contamination with aflatoxins, the potent carcinogenic secondary metabolites of the fungus. Protein profiles of maize genotypes resistant and susceptible to A.