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Appl Environ Microbiol. 1973 March; 25(3): 342-345
Copyright © 1973 American Society for Microbiology. All Rights Reserved.

Effects of Aflatoxin on Germination and Growth of Lettuce

¹ Department of Food Science and Technology, University of California, Davis, California 95616

ABSTRACT

The relative susceptibility of 30 cultivars of lettuce to inhibition by aflatoxin was studied. Seed germination was not inhibited by concentrations as high as 1,000 µg/ml in cultivar Imperial 44 or by 100 µg/ml in the remaining cultivars. Hypocotyl elongation was inhibited by 46 to 68% at a concentration of 100 µg of aflatoxin per ml. Seedlings exposed to aflatoxin did not become chlorotic. The similarity between the morphological reaction of plants to coumarin and aflatoxin suggests a common mode of action, but further studies of the physiological basis for the inhibitory reactions induced by these compounds will be necessary before such conclusions will be valid.