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

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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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Acknowledgements

This work was partially supported by Agencia Córdoba Ciencia (ex-CONICOR) (nos. 1416/97; 1655/99) and PROYUNGAS (1999, 2001). We thank Tom Horton and Joyce Eberhart for their assistance in the molecular analysis. We also particularly thank Dr M. Moser for the identification of Cortinarius helodes sp. nov. Special thanks to Dr Efren Cázares, Oregon State University and Marcelo Zak for critically reading the manuscript. A. B. is grateful to FOMEC and CONICET for the fellowship provided, E. N. holds a postdoctoral position from CONICET.

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Authors and Affiliations

  1. Instituto Multidisciplinario de Biología Vegetal (CONICET), C.C. 495, 5000, Córdoba, Argentina

    Alejandra Becerra, Graciela Daniele & Laura Domínguez

  2. Department of Forest Science, Oregon State University, Corvallis, OR, 97331, USA

    Eduardo Nouhra

  3. USDA Forest Service, Forestry Sciences Laboratory, Pacific Northwest Research Station, 3200 SW Jefferson Way, Corvallis, OR, 97331, USA

    Donaraye McKay

Authors
  1. Alejandra Becerra
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  2. Eduardo Nouhra
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  3. Graciela Daniele
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  4. Laura Domínguez
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  5. Donaraye McKay
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Correspondence to Alejandra Becerra.

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Becerra, A., Nouhra, E., Daniele, G. et al. Ectomycorrhizas of Cortinarius helodes and Gyrodon monticola with Alnus acuminata from Argentina. Mycorrhiza 15, 7–15 (2005). https://doi.org/10.1007/s00572-003-0278-x

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