Size, Nuclear Number, and Aggressiveness ofBotrytis cinereaSpores Produced on Media of Varied Glucose Concentrations

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Abstract
Spores of Botrytis cinerea were produced at 15.degree.C on a defined medium containing 20, 150, or 300 g/L of glucose. Increasing the glucose in the growth medium resulted in an increase in the volume and nuclear number of spores and increased their aggressiveness when inoculated on rose flowers. The effect of increasing the nuclear number on aggressiveness could not be separated from the effect of increased spore volume.