Freshwater hyphomycete communities in a canal. 1. Endophytic hyphomycetes of submerged roots of trees sheltering a canal bank

摘要

Seventeen species of freshwater hyphomycetes were found as endophytes of roots ofMangifera indica,Populus hybrida, andSalix babylonicaextending into the water from crevices in the brick wall of a canal in Lahore, Pakistan. More species were recovered by aerating than by plating bark and xylem segments on malt extract agar. Endophytic species of bark outnumbered those of xylem detected by aeration and plating methods.Anguillospora longissima,Articulospora proliferata,Bacillispora aquatica,Flagellospora curvula,Flagellospora fusarioides,Flagellospora penicillioides,Fusariumsp., andTetracladium marchalianumwere produced in abundance on aerated root segments.Fusariumsp. dominated other endophytic species of three tree species. Fifteen, 14, and 12 species were recovered fromSalix babylonica,Mangifera indica, andPopulus hybrida, respectively.Campylospora chaetocladiawas confined on the bark andHeliscus lugdunensison the bark as well as xylem segments ofSalix babylonica.Clavariopsis azlaniiandTricellula aquaticawere recovered from roots ofMangifera indica.Key words: endophytic freshwater hyphomycetes, submerged roots, canal water.