Mycologia
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DOI: 10.3852/mycologia.98.1.23
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Mycologia, 98(1), 2006, pp. 23-30.
© 2006 by The Mycological Society of America

Characterization and identification of field ectomycorrhizae of Boletus edulis and Cistus ladanifer


Beatriz Águeda 1

     Departamento de Investigación y Experiencias Forestales de Valonsadero, Consejería de Medio Ambiente, Junta de Castilla y León, Apdo. de correos 175, E-42080 Soria, España

Javier Parladé

     IRTA, Departament de Protecció Vegetal, Ctra. Cabrils s/n, E-08348 Cabrils (Barcelona), España

Ana María de Miguel

     Universidad de Navarra, Facultad de Ciencias, Departamento de Botánica, E-31008 Pamplona, España

Fernando Martínez-Peña

     Departamento de Investigación y Experiencias Forestales de Valonsadero, Consejería de Medio Ambiente, Junta de Castilla y León, Apdo. de correos 175, E-42080 Soria, España

Field ectomycorrhizae sampled under Boletus edulis and Cistus ladanifer have been characterized and described in detail based on standard morphological and anatomical characters. The described ectomycorrhiza has traits typical of Boletales: whitish with three differentiated plectenchymatous layers in the mantle in plan view forming ring-like structures and rhizomorphs with highly differentiated hyphae. The inflated, smooth cystidia-like clavate end cells on the surface of the rhizomorphs and their slightly twisted external hyphae are additional characterizing features. The Hartig net occupies 11/2 rows of cortical cells, partly reaching the endodermis. Not all hyphae have clamps. The identification of the fungal symbiont as B. edulis was confirmed by ITS rDNA sequence comparison between mycorrhizas and sporocarps. The singularity of this symbiotic association, as well as its ecological and practical implications, are discussed.

Key words: anatomy, description, ITS rDNA, morphology

1 Correponding author. E-mail: aguherbe{at}jcyl.es






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Copyright © 2006 by The Mycological Society of America.