title: Ectomycorrhizas of Cortinarius helodes and Gyrodon monticola with Alnus acuminata from Argentina.
abstract: 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 Tucuman 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 the mantle surface, and hyaline and brown emanating hyphae with dolipores. Restriction fragment length polymorphism analysis of the nuclear rDNA internal transcribed spacer provided a distinctive profile for each of the collections of fruitbodies and the mycorrhizal morphotypes.
authors.affiliation: Instituto Multidisciplinario de Biología Vegetal (CONICET), C.C. 495, 5000, Córdoba, Argentina. abecerra@imbiv.unc.edu.ar
authors.forename: Alejandra
authors.initials: A
authors.lastname: Becerra
authors.forename: Eduardo
authors.initials: E
authors.lastname: Nouhra
authors.forename: Graciela
authors.initials: G
authors.lastname: Daniele
authors.forename: Laura
authors.initials: L
authors.lastname: Domínguez
authors.forename: Donaraye
authors.initials: D
authors.lastname: McKay
mesh_terms: D000363:Agaricales / Q000235:genetics / Q000502:physiology* / Q000648:ultrastructure; D029661:Alnus / Q000382:microbiology*; D001118:Argentina; D001487:Basidiomycota / Q000235:genetics / Q000502:physiology* / Q000648:ultrastructure; D004271:DNA, Fungal / Q000235:genetics; D025301:Hyphae / Q000648:ultrastructure; D036341:Intercellular Signaling Peptides and Proteins; D009942:Organometallic Compounds; D010455:Peptides; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D004271:DNA, Fungal; D036341:Intercellular Signaling Peptides and Proteins; D009942:Organometallic Compounds; C074094:PC 1038; D010455:Peptides