Soil fungi of some low-altitude desert cotton fields and ability of their extracts to inhibit Aspergillus flavus

Soil is presumed to be a major source of inoculum for Aspergillus flavus which contaminates cottonseed and produces the potent carcinogen, aflatoxin. Little is known about the mycoflora of the low desert soils of cotton fields where aflatoxin is a chronic problem. In this study, soils from cotton fi...

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Bibliographic Details
Published in:Mycopathologia (1975) 1998-01, Vol.142 (2), p.97-100
Main Author: Klich, M.A
Format: Article
Language:English
Subjects:
Altitude
Antifungal Agents - isolation & purification
Antifungal Agents - pharmacology
Arizona
Aspergillus
aspergillus auricomus
Aspergillus flavus
Aspergillus flavus - drug effects
Aspergillus flavus - growth & development
Aspergillus flavus - isolation & purification
Biological and medical sciences
Biological control
California
Control
Desert Climate
extracts
fields
Fundamental and applied biological sciences. Psychology
fungal antagonists
Fungal plant pathogens
Fusarium - chemistry
Fusarium - isolation & purification
Fusarium solani
Gossypium - microbiology
Gossypium hirsutum
growth
inhibition
Mycological Typing Techniques
Penicillium
Penicillium - chemistry
Penicillium - isolation & purification
penicillium vinaceum
Phytopathology. Animal pests. Plant and forest protection
soil fungi
Soil Microbiology
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Summary:Soil is presumed to be a major source of inoculum for Aspergillus flavus which contaminates cottonseed and produces the potent carcinogen, aflatoxin. Little is known about the mycoflora of the low desert soils of cotton fields where aflatoxin is a chronic problem. In this study, soils from cotton fields in southwestern Arizona and south-eastern California were assayed for filamentous fungi. Forty-two taxa, predominantly in the genera Aspergillus, Penicillium and Fusarium, were isolated. To determine whether or not compounds produced by these fungi could be potential inhibitors of A. flavus, extracts of strains of each taxon were tested for their ability to inhibit growth of A. flavus. Twelve taxa produced compounds inhibitory to A. flavus, including several strains of Fusarium solani, Penicillium vinaceum and Aspergillus auricomus.
ISSN:0301-486X
1573-0832
DOI:10.1023/A:1006989712282