Fungal extracts that induce phytoalexins in sweet potato roots1

摘要

Soluble extracts from mycelia and conidia of two strains ofCeratocyslis fimbriatainduced formation of terpenes in sweet potato root tissue. Factors inducing terpene formation are water- or 0.02MKCl-soluble, heat stable, organic solvent-insoluble, and dialyzable, and have neither cationic nor anionic properties. They caused cellular injury of root tissue, accompanied by production of ethylene.