FRESH-WATER HYPHOMYCETE COMMUNITIES IN A CANAL .1. ENDOPHYTIC HYPHOMYCETES OF SUBMERGED ROOTS OF TREES SHELTERING A CANAL BANK

Seventeen species of freshwater hyphomycetes were found as endophytes of roots of Mangifera indica, Populus hybrida, and Salix babylonica ex tending into the water from crevices in the brick wall of a canal in L ahore, Pakistan. More species were recovered by aerating than by plati ng bark and xylem segments on malt extract agar. Endophytic species of bark outnumbered those of xylem detected by aeration and plating meth ods. Anguillospora longissima, Articulospora proliferata, Bacillispora aquatica, Flagellospora curvula, Flagellospora fusarioides, Flagellos pora penicillioides, Fusarium sp., and Tetracladium marchalianum were produced in abundance on aerated root segments. Fusarium sp. dominated other endophytic species of three tree species. Fifteen, 14, and 12 s pecies were recovered from Salix babylonica, Mangifera indica, and Pop ulus hybrida, respectively. Campylospora chaetocladia was confined on the bark and Heliscus lugdunensis on the bark as well as xylem segment s of Salix babylonica. Clavariopsis azlanii and Tricellula aquatica we re recovered from roots of Mangifera indica.