Mycorrhizal fungi in Pinus ponderosa introduced in Central Patagonia (Argentina)

Carolina Barroetaveña1*, Mario Rajchenberg1 and Efrén Cázares2

1. Centro de Investigación y Extensión Forestal Andino Patagónico, C.C. 14, 9200 Esquel, Chubut, Argentina. E-mail:

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

* Corresponding author

(Nova Hedwigia 80: 453-464; 2005).


A study to survey the ectomycorrhizal fungi found in ponderosa pine plantations and bare-root nurseries in Central Patagonia (Argentina) was conducted. Fourteen plantations and eight nurseries were sampled for hypogeous and epigeous fungi for three years. Rhizopogon ellenae, Tricholoma muricatum, Cortinarius sp. subg. Telamonia and Radiigera sp. were found exclusively in plantations. Laccaria tortilis, Hebeloma hiemale, Scleroderma areolatum, Inocybe kauffmanii, Scleroderma fuscum, Thelephora terrestris, Rhizopogon subolivascens, Amanita sp. and Tuber sp. were found exclusively in nurseries. Hebeloma mesophaeum, Rhizopogon roseolus, Suillus luteus, Tomentella atramentaria and Amphinema byssoides were found in nurseries and plantations. Overall, eighteen ectomycorrhizal species were found in association with ponderosa pine plantations and nurseries. The most widely distributed species were Amphinema byssoides, Hebeloma mesophaeum, Suillus luteus and Rhizopogon roseolus in plantations, and R. roseolus and H. mesophaeum in nurseries. Because of their wide distribution and abundance in plantations and their relative abundant spore concentration, Hebeloma mesophaeum, Rhizopogon roseolus and Suillus luteus are potential candidates that could be used in mycorrhizal inoculation programs for ponderosa pine in forest nurseries.

Key words: ectomycorrhizal fungi, exotic plantations, nurseries, ponderosa pine

A review with the ectomycorrhizal species registered in ponderosa pine native forests is presented (Appendix 1).


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