Chitin stimulates development and sporulation of arbuscular mycorrhizal fungi

Abstract Chitin added to sand-soil based cultivation substrates stimulated the root colonization, growth of extraradical mycelium and production of spores of arbuscular mycorrhizal fungi (AMF) in three experiments with Allium amppelloprasum , Plantago lanceolata and Lactuca sativa as host plants. Stimulation of AMF sporulation was also observed when autoclaved mycelium of Fusarium oxysporum was used instead of chitin. Increased numbers of actinomycetes in the substrate as a result of chitin treatment were recorded.