SEPTAL ULTRASTRUCTURE OF SOME FUNGAL ENDOPHYTES FROM BOREAL ORCHID MYCORRHIZAS

The septal ultrastructure of nine fungal endophytes from mycorrhizas of boreal orchids was examined to corroborate identifications made previously on the basis of cultural and microscopic characteristics. Leptodontidium orchidicola has a simple septum perforated by a single central pore flanked by Woronin bodies. Epulorhiza anaticula, E. repens, and a Sebacina sp. all have dolipore septa with flattened septal pore caps some of which have a n-minute single central perforation. Ceratobasidium cornigerum, C. obscurum, Moniliopsis anomala, Thanatephorus pennatus and Sistotrema sp. have dolipore septa with dome-shaped, perforated septal pore caps.