Ectomycorrhizae between Gyrodon monticola Singer and Cortinarius sp. and Alnus acuminata H.B.K. (Argentina) characterized by anatomical and molecular tools

BECERRA, A., DANIELE, G., DOMÍNGUEZ, L., NOUHRA, E. Y HORTON, T.

South Australia

Conferencia; 3rd International Conference of Mycorrhizas; 2001

The University of Adelaide

Natural ectomycorrhizae between Gyrodon monticola and Cortinarius sp. and Alnus acuminata ("andean alder", "aliso del cerro") are described by morphological and anatomical characteristics. Ectomycorrhizal roots were sampled from underneath sporocarps of both fungi. The samples were taken from four plots in two homogeneous A. acuminata sites (Tucumán and Catamarca Provinces, Argentina). The ectomycorrhizae were described morphologically and by molecular tools using polymerase chain reaction (PCR) amplification of the fungal DNA. The most important features of Gyrodon monticola ectomycorrhizae are: highly differentiated rhizomorphs with central hyphae, inflated cells on the surface mantle with brown pigments, hyaline and brown emanating hyphae with dolipores and a plectenchymatous mantle on the mycorrhizae with rounded apex. Cortinarius sp. ectomycorrhizae showed a thick blue, white to beige mantle, with abundant hyphal bundles and milky exudates when injured. The ectomycorrhizae presented in this work are part of a project where the morphotypes diversity associated with Alnus acuminata are being studied.