Plant-Growth Regulator, lmidazole-4-Carboxamide, Produced by the Fairy Ring Forming Fungus Lepista sordida

摘要

Rings or arcs of fungus-regulated plant growth occur often on the floor of woodlands, in agricultural areas, and in grasslands worldwide. These rings are commonly called "fairy rings". A plant-growth regulating compound was isolated from a fairy ring forming fungus, Lepista sordida, and its chemical structure was identified as imidazole-4-carboxamide (ICA) by spectroscopic analyses Including single-crystal X-ray diffraction techniques. ICA inhibited the growth of turfgrass and rice seedling. On the other hand, in a greenhouse experiment, this compound increased rice grain yield by 26% compared with control.