P J Cotty

Summary

Affiliation: University of Arizona
Country: USA

Publications

  1. doi request reprint Ecology of aflatoxin producing fungi and biocontrol of aflatoxin contamination
    P J Cotty
    Agricultural Research Service, United States Department of Agriculture and Division of Plant Pathology and Microbiology, Department of Plant Sciences, University of Arizona, 85721, Tucson, AZ, USA
    Mycotoxin Res 22:110-7. 2006
  2. ncbi request reprint Influences of climate on aflatoxin producing fungi and aflatoxin contamination
    Peter J Cotty
    Agricultural Research Service, USDA, United States
    Int J Food Microbiol 119:109-15. 2007
  3. doi request reprint Impact of Aspergillus section Flavi community structure on the development of lethal levels of aflatoxins in Kenyan maize (Zea mays)
    C Probst
    Department of Plant Sciences, The University of Arizona, Tucson, Arizona, USA
    J Appl Microbiol 108:600-10. 2010
  4. pmc Influence of the host contact sequence on the outcome of competition among aspergillus flavus isolates during host tissue invasion
    H L Mehl
    USDA ARS, School of Plant Sciences, University of Arizona, P O Box 210036, Tucson, AZ 85721 0036, USA
    Appl Environ Microbiol 77:1691-7. 2011
  5. doi request reprint Genetic isolation among sympatric vegetative compatibility groups of the aflatoxin-producing fungus Aspergillus flavus
    L C Grubisha
    United States Department of Agriculture, Agriculture Research Service, School of Plant Sciences, The University of Arizona, PO Box 210036, Tucson, AZ 85721 0036, USA
    Mol Ecol 19:269-80. 2010
  6. pmc Divergence of West African and North American communities of Aspergillus section Flavi
    P J Cotty
    Southern Regional Research Center, Agricultural Research Service, U S Department of Agriculture, New Orleans, Louisiana 70179 0687, USA
    Appl Environ Microbiol 65:2264-6. 1999
  7. ncbi request reprint Aflatoxin biosynthesis gene clusters and flanking regions
    K C Ehrlich
    U S Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, 1100 Robert E Lee Boulevard, PO Box 19687, New Orleans, LA 70179, USA
    J Appl Microbiol 99:518-27. 2005
  8. ncbi request reprint No effect of soybean lipoxygenase on aflatoxin production in Aspergillus flavus-inoculated seeds
    J K Mellon
    U S Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, P O Box 19687, New Orleans, Louisiana 70179, USA
    J Food Prot 65:1984-7. 2002
  9. doi request reprint Twenty-four microsatellite markers for the aflatoxin-producing fungus Aspergillus flavus
    L C Grubisha
    USDA ARS, Department of Plant Sciences, The University of Arizona, P O Box 210036, Tucson, AZ 85721 0036, USA
    Mol Ecol Resour 9:264-7. 2009
  10. ncbi request reprint Variation in in vitro alpha-amylase and protease activity is related to the virulence of Aspergillus flavus isolates
    R L Brown
    Southern Regional Research Center, U S Department of Agriculture, Agricultural Research Service, New Orleans, Louisiana 70179, USA
    J Food Prot 64:401-4. 2001

Collaborators

Detail Information

Publications26

  1. doi request reprint Ecology of aflatoxin producing fungi and biocontrol of aflatoxin contamination
    P J Cotty
    Agricultural Research Service, United States Department of Agriculture and Division of Plant Pathology and Microbiology, Department of Plant Sciences, University of Arizona, 85721, Tucson, AZ, USA
    Mycotoxin Res 22:110-7. 2006
    ..These atoxigenic strains can serve as biological control agents for management of aflatoxins in crops. Detailed knowledge of the ecology of aflatoxin-producing fungi may lead to novel practical methods for limiting contamination...
  2. ncbi request reprint Influences of climate on aflatoxin producing fungi and aflatoxin contamination
    Peter J Cotty
    Agricultural Research Service, USDA, United States
    Int J Food Microbiol 119:109-15. 2007
    ..Understanding the impact of climate may allow development of improved management procedures, better allocation of monitoring efforts, and adjustment of agronomic practices in anticipation of global climate change...
  3. doi request reprint Impact of Aspergillus section Flavi community structure on the development of lethal levels of aflatoxins in Kenyan maize (Zea mays)
    C Probst
    Department of Plant Sciences, The University of Arizona, Tucson, Arizona, USA
    J Appl Microbiol 108:600-10. 2010
    ....
  4. pmc Influence of the host contact sequence on the outcome of competition among aspergillus flavus isolates during host tissue invasion
    H L Mehl
    USDA ARS, School of Plant Sciences, University of Arizona, P O Box 210036, Tucson, AZ 85721 0036, USA
    Appl Environ Microbiol 77:1691-7. 2011
    ..Early dispersal to susceptible crop components may allow maintenance within A. flavus populations of genetic types with low competitive ability during host tissue invasion...
  5. doi request reprint Genetic isolation among sympatric vegetative compatibility groups of the aflatoxin-producing fungus Aspergillus flavus
    L C Grubisha
    United States Department of Agriculture, Agriculture Research Service, School of Plant Sciences, The University of Arizona, PO Box 210036, Tucson, AZ 85721 0036, USA
    Mol Ecol 19:269-80. 2010
    ..We found high levels of genetic differentiation and no evidence of gene flow between VCGs, including VCGs of opposite mating-type. Our results suggest that these VCGs diverged before domestication of agricultural hosts (>10,000 yr bp)...
  6. pmc Divergence of West African and North American communities of Aspergillus section Flavi
    P J Cotty
    Southern Regional Research Center, Agricultural Research Service, U S Department of Agriculture, New Orleans, Louisiana 70179 0687, USA
    Appl Environ Microbiol 65:2264-6. 1999
    ..No North American S strain isolate produced aflatoxin G1. This geographical and physiological divergence may influence aflatoxin management...
  7. ncbi request reprint Aflatoxin biosynthesis gene clusters and flanking regions
    K C Ehrlich
    U S Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, 1100 Robert E Lee Boulevard, PO Box 19687, New Orleans, LA 70179, USA
    J Appl Microbiol 99:518-27. 2005
    ..To compare the biosynthetic gene cluster sequences of the main aflatoxin (AF)-producing Aspergillus species...
  8. ncbi request reprint No effect of soybean lipoxygenase on aflatoxin production in Aspergillus flavus-inoculated seeds
    J K Mellon
    U S Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, P O Box 19687, New Orleans, Louisiana 70179, USA
    J Food Prot 65:1984-7. 2002
    ..Seed coat integrity and seed viability seem to be more important characteristics in soybean seed resistance to aflatoxin contamination. Soybean seeds lacking LOX seem safe from the threat of increased seed pathogen susceptibility...
  9. doi request reprint Twenty-four microsatellite markers for the aflatoxin-producing fungus Aspergillus flavus
    L C Grubisha
    USDA ARS, Department of Plant Sciences, The University of Arizona, P O Box 210036, Tucson, AZ 85721 0036, USA
    Mol Ecol Resour 9:264-7. 2009
    ..For loci polymorphic across all three VCGs, the number of alleles ranged from two to 19. These markers will be useful for genetic studies of this economically important pathogen...
  10. ncbi request reprint Variation in in vitro alpha-amylase and protease activity is related to the virulence of Aspergillus flavus isolates
    R L Brown
    Southern Regional Research Center, U S Department of Agriculture, Agricultural Research Service, New Orleans, Louisiana 70179, USA
    J Food Prot 64:401-4. 2001
    ..These variations in other hydrolytic activities (besides pectinases) may contribute to virulence differences in cotton bolls between AF12 and AF13...
  11. pmc Outbreak of an acute aflatoxicosis in Kenya in 2004: identification of the causal agent
    Claudia Probst
    University of Arizona, USDA ARS, Department of Plant Sciences, Tucson, AZ 85721, USA
    Appl Environ Microbiol 73:2762-4. 2007
    ..Here we associate the S strain of Aspergillus flavus with lethal aflatoxicoses that took more than 125 lives in 2004...
  12. doi request reprint Use of pyrosequencing to quantify incidence of a specific Aspergillus flavus strain within complex fungal communities associated with commercial cotton crops
    Modan K Das
    Agricultural Research Service, United States Department of Agriculture, Department of Plant Sciences, University of Arizona, Tucson 85721 0036, USA
    Phytopathology 98:282-8. 2008
    ..Pyrosequencing has the potential to become a powerful tool for monitoring atoxigenic strains within complex A. flavus communities without limitations imposed by traditional culturing methods...
  13. doi request reprint Distribution and toxigenicity of Aspergillus species isolated from maize kernels from three agro-ecological zones in Nigeria
    Joseph Atehnkeng
    International Institute of Tropical Agriculture, PMB 5320, Ibadan, Nigeria
    Int J Food Microbiol 122:74-84. 2008
    ..When agro-ecological zones were compared, B-aflatoxins were significantly (P<0.05) higher in SGS than in NGS, and intermediate in maize samples from the DS agro-ecological zone...
  14. ncbi request reprint Time course study of substrate utilization by Aspergillus flavus in medium simulating corn (Zea mays) kernels
    Jay E Mellon
    Southern Regional Research Center, Agricultural Research Service, U S Department of Agriculture, P O Box 19687, New Orleans, Louisiana 70179, USA
    J Agric Food Chem 50:648-52. 2002
    ..In contrast to previously described selective use of simple carbohydrates by A. flavus, less discrimination was displayed when faced with utilization of complex substrates such as starch or triglycerides...
  15. ncbi request reprint An isolate of Aspergillus flavus used to reduce aflatoxin contamination in cottonseed has a defective polyketide synthase gene
    Kenneth C Ehrlich
    Southern Regional Research Center ARS USDA, PO Box 19687, New Orleans, LA 70179, USA
    Appl Microbiol Biotechnol 65:473-8. 2004
    ..This nucleotide change introduces a premature stop codon into the coding sequence, thereby preventing enzyme production and aflatoxin accumulation...
  16. ncbi request reprint Association of aflatoxin biosynthesis and sclerotial development in Aspergillus parasiticus
    Perng Kuang Chang
    Southern Regional Research Center, Agricultural Research Service, US Department of Agriculture, New Orleans, Louisiana 70124, USA
    Mycopathologia 153:41-8. 2002
    ..We proposed that competition for a common substrate, such as acetate, by the aflatoxin biosynthetic pathway could adversely affect sclerotial development in A. parasiticus...
  17. doi request reprint Development of a GFP-expressing Aspergillus flavus strain to study fungal invasion, colonization, and resistance in cottonseed
    Kanniah Rajasekaran
    USDA, ARS, Southern Regional Research Center, Food and Feed Safety Research Unit, 1100 Robert E Lee Blvd, New Orleans, LA 70124, USA
    Mycopathologia 165:89-97. 2008
    ..In addition, development of GFP expressing A. flavus strain provides an easy and rapid assay procedure for studying the ecology, etiology, and epidemiology of cotton boll rot caused by A. flavus resulting in aflatoxin contamination...
  18. ncbi request reprint Sequence comparison of aflR from different Aspergillus species provides evidence for variability in regulation of aflatoxin production
    Kenneth C Ehrlich
    US Department of Agriculture, Southern Regional Research Center, Agricultural Research Service, New Orleans, LA 70179 0687, USA
    Fungal Genet Biol 38:63-74. 2003
    ..Phylogenetic analyses also suggest that isolates currently assigned to the A. flavus morphotype SBG represent a distinct species and that A. nomius is a diverse paraphyletic assemblage likely to contain several species...
  19. ncbi request reprint Aspergillus flavus hydrolases: their roles in pathogenesis and substrate utilization
    Jay E Mellon
    US Department of Agriculture, Agricultural Research Service, Southern Regional Research Center, P O Box 19687, New Orleans, LA 70179, USA
    Appl Microbiol Biotechnol 77:497-504. 2007
    ..flavus. This information may be critical for the formulation of successful strategies to control aflatoxin contamination in affected commodities...
  20. ncbi request reprint Promoter elements in the aflatoxin pathway polyketide synthase gene
    Kenneth C Ehrlich
    Southern Regional Research Center, United States Department of Agriculture, P O Box 19687, 1100 R E Lee Blvd, New Orleans, LA 70179, USA
    Biochim Biophys Acta 1576:171-5. 2002
    ....
  21. ncbi request reprint Analysis of single nucleotide polymorphisms in three genes shows evidence for genetic isolation of certain Aspergillus flavus vegetative compatibility groups
    Kenneth C Ehrlich
    Southern Regional Research Center, New Orleans, LA 70179, USA
    FEMS Microbiol Lett 268:231-6. 2007
    ..Although recombination between certain pairs of VCGs could not be excluded, none was found for YV36, the VCG that includes the atoxigenic A. flavus isolate currently used to mitigate aflatoxin contamination in cotton in Arizona...
  22. ncbi request reprint Divergent regulation of aflatoxin production at acidic pH by two Aspergillus strains
    Kenneth C Ehrlich
    Southern Regional Research Center ARS USDA, New Orleans, PO Box 19687, LA 70179 0687, USA
    Mycopathologia 159:579-81. 2005
    ..The lower AF production was not well correlated with decreases in expression of the aflatoxin pathway regulatory gene, aflR, or of two other biosynthesis genes...
  23. ncbi request reprint Substrate utilization by Aspergillus flavus in inoculated whole corn kernels and isolated tissues
    Jay E Mellon
    Southern Regional Research Center, Agricultural Research Service, U S Department of Agriculture, P O Box 19687, New Orleans, Louisiana 70179, USA
    J Agric Food Chem 53:2351-7. 2005
    ..When invading nonwounded corn kernels, the fungus selectively targets the germ tissue where these materials are localized in the highest concentrations...
  24. pmc Aflatoxin biosynthesis cluster gene cypA is required for G aflatoxin formation
    Kenneth C Ehrlich
    Southern Research Center, Agricultural Regional Research Service, U S Department of Agriculture, New Orleans, Louisiana 70179, USA
    Appl Environ Microbiol 70:6518-24. 2004
    ..The substrate for CypA may be an intermediate formed by oxidative cleavage of the A ring of O-methylsterigmatocystin by OrdA, the P450 monooxygenase required for formation of aflatoxins B1 and B2...
  25. ncbi request reprint Expression of pectinase activity among Aspergillus flavus isolates from southwestern and southeastern United States
    Jay E Mellon
    USDA, ARS, Southern Regional Research Center, PO Box 19687, New Orleans, Louisiana 70179, USA
    Mycopathologia 157:333-8. 2004
    ..Thus, although P2c-lacking isolates have reduced invasiveness, these isolates still have sufficient pathogenicity to cause aflatoxin contamination...
  26. ncbi request reprint Aflatoxin-producing Aspergillus species from Thailand
    Kenneth C Ehrlich
    Southern Regional Research Center ARS USDA, 1100 RE Lee Blvd, PO Box 19687, New Orleans LA 70124, USA
    Int J Food Microbiol 114:153-9. 2007
    ..Our results suggest that such unusual A. nomius isolates could be a previously unrecognized agent for aflatoxin contamination in Thailand...