A. flavus is the primary causal agent of aflatoxin contamination of cottonseed. The concern of aflatoxin contamination of cottonseed in the United States is due to the feed-mediated transfer of contaminated seeds to milk of dairy cows [5]. Aflatoxin contamination of cottonseed is frequent in pre-mature seeds associated with insect damage to the boll, particularly by pink boll worm [6].The contamination also occurs after seed maturity and boll opening, and involves direct infection of seed by A. flavus [6,7]. Biotic and abiotic factors, either nutritional or environmental
including temperature, pH, and drought stress, are also known to
trigger aflatoxin production in toxigenic Aspergillus species,
although the molecular mechanisms for these effects are still
unclear [8e11].
A. flavus is the primary causal agent of aflatoxin contamination of cottonseed. The concern of aflatoxin contamination of cottonseed in the United States is due to the feed-mediated transfer of contaminated seeds to milk of dairy cows [5]. Aflatoxin contamination of cottonseed is frequent in pre-mature seeds associated with insect damage to the boll, particularly by pink boll worm [6].The contamination also occurs after seed maturity and boll opening, and involves direct infection of seed by A. flavus [6,7]. Biotic and abiotic factors, either nutritional or environmentalincluding temperature, pH, and drought stress, are also known totrigger aflatoxin production in toxigenic Aspergillus species,although the molecular mechanisms for these effects are stillunclear [8e11].
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