Mycorrhizae in Adenostoma fasciculatum Hook. & Arn. A combination of unusual ecto- and endo-forms

M. F. Allen, L. M. Egerton-Warburton, E. B. Allen, O. Karen

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


The mycorrhizal status of Adenostoma fasciculatum, the dominant shrub in California chaparral, has been unclear. In two typical, nearly monospecific stands, A. fasciculatum was found to have arbuscules and intercellular hyphae. Antisera detected hyphae of the arbuscular mycorrhizal (AM) fungal genera Acaulospora, Glomus, and Scutellospora, although we found only spores of Glomus. Some roots had partial sheaths and inter- and intracellular septate fungi without indications of root necrosis. Ectomycorrhizal root tips were also found, including Cenococcum and other unknown taxa. Sporocarps of EM fungi including species of Rhizopogon, Pisolithus, Balsamia, Laccaria, Hygrophorus, and Cortinarius were found in the stand, with no other EM or arbutoid mycorrhizal plants nearby. These observations indicate that A. fasciculatum forms mycorrhizae with AM, septate, and EM fungi, but often fails to form easily recognizable mycorrhizal structures.

Original languageEnglish (US)
Pages (from-to)225-228
Number of pages4
Issue number4
StatePublished - Jan 1 1999


  • Adenostoma fasciculatum
  • Arbuscular mycorrhizae
  • Chaparral
  • Ectomycorrhizae

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics
  • Plant Science

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