The composition and attributes of Colletotrichum truncatum spores are altered by nutritional requirements

The influence of the nutritional condition on conidiation and conidial attributes of the fungus Colletotrichum truncatum NRRL 13737, causing disease in the weed Sesbania exaltata, was reported. The carbon-to-nitrogen (CN) ratio of the medium influenced the substrate utilization, culture growth, spore yield, spore composition, biomass accumulation and cellular composition. Optimization experiments suggested that media with a CN ratio of 15:1 to 20:1 might be optimal for spore production.