Ectomycorrhizas of Cortinarius helodes and Gyrodon monticola with Alnus acuminata from Argentina

BECERRA, A., E. NOUHRA, G. DANIELE, L. DOMÍNGUEZ & D. MCKAY

MYCORRHIZA

Springer Verlag, Berlin, Heidelberg

Lugar: Alemania; Año: 2005 vol. 15 p. 7 - 15

0940-6360

Field ectomycorrhizas of Cortinarius helodes Moser, Matheny & Daniele (sp. nov) and Gyrodon monticola Sing. on Alnus acuminata Kunth (“andean alder”, “aliso del cerro”) are described based on morphological and anatomical features. Ectomycorrhizal roots were sampled beneath fruitbodies of C. helodes and G. monticola from two homogeneous A. acuminata forest sites located in Tucumán and Catamarca Provinces in Argentina. C. helodes ectomycorrhizas showed a thick white to beige mantle exuding a milky juice when injured, were bluish toward the apex, and had hyphal strands in the mantle. G. monticola ectomycorrhizas showed some conspicuous features like highly differentiated rhizomorphs, inflated brown cells on mantle surface, and hyaline and brown emanating hyphae with dolipores. Restriction fragment length polymorphism (RFLP) analysis of the nuclear rDNA internal transcriber spacer (ITS) provided a distinctive profile for each of the fruitbodies collections and the mycorrhizal morphotypes.