Ectomycorrhizas of Cortinarius helodes and Gyrodon monticola with Alnus acuminata from Argentina |
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Authors: | Alejandra Becerra Eduardo Nouhra Graciela Daniele Laura Domínguez Donaraye McKay |
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Institution: | (1) Instituto Multidisciplinario de Biología Vegetal (CONICET), C.C. 495, 5000 Córdoba, Argentina;(2) Department of Forest Science, Oregon State University, Corvallis, OR 97331, USA;(3) USDA Forest Service, Forestry Sciences Laboratory, Pacific Northwest Research Station, 3200 SW Jefferson Way, Corvallis, OR 97331, USA |
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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 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 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. |
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Keywords: | Andean alder Cortinarius helodes Gyrodon monticola Morphological characterization Polymerase chain reaction/restriction fragment length polymorphism |
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