Endogone pisiformis: axenic culture and associations withSphagnum, Pinus sylvestris, Allium cepa, andAllium porrum

摘要

Endogone pisiformisis described in pure culture on various normal mycological media. The usually coenocytic mycelium is characteristically coloured yellow and bears numerous lipid-fllled hyphal swellings. Under axenic conditions, hyphae are attracted toSphagnum, but the fungus has neither sporulated on nor parasitized theSphagnum. Endogone pisiformisdoes not form ectomycorrhizae under the conditions studied with inoculatedPinus sylvestrisalthough the fungus may survive in its rhizosphere. GerminatedAllium porrumandAllium cepaseeds, moribund roots, and shoots were colonized byEndogone pisiformiswhich formed densely branched, fine hyphal structures and lipid-filled hyphal swellings within these plant tissues. The possibility is raised that these structures are homologous to the arbuscules and vesicles of vesicularndash;arbuscular mycorrhizal fungi. Examination of otherEndogonespecies may elucidate the phylogeny of this genus.