Influence of different nitrogen sources on the production of the antifungal activity of Bacillus UCR-236 and application of a microtiter reader system to evaluate this activity

Bacillus UCR-236 produces antifungal activity against mycelial fungi when sodium glutamate is present in the culture medium. The use of other compounds like yeast extract, peptone or urea as nitrogen source led to growth but no antifungal activity was produced. Using inorganic-nitrogen sources the cell production was very low and no antifungal activity was produced either. A microtiter system showed to be a rapid, efficient, economic method to evaluate semi-quantitatively the antifungal activity produced

Antimicrobial activity of Bacillus UCR 236 and its potential use as biological control

The strain Bcillus UCR-236 produces a substance with activity against some mycelial fungi but no activity against yeast and bacteria. It is possible to reduce the infection rate of Mycena citricolor (American leaf spot disease agent) on the coffee leaf surface in a moisture chamber test, using Bacillus URC-236 culture. A possible action pattern of the substance was suggested