MYCORRHIZAE AND MYCORRHIZAL FUNGI OF CALYPSO BULBOSA

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Abstract
The seasonal development and fungal endophytes of the mycorrhizal roots ofCalypso bulbosa(L.) Oakes were studied using fresh collections from Alberta and herbarium specimens from six herbaria. Typically, a single pair of mycorrhizal roots are produced at the base of a single corm each growing season. No evidence was found to support the putative existence of a coralloid rhizome in this species. The pattern of fungal infection, peloton formation, and breakdown is similar to other nonsaprophytic, terrestrial orchids. The endophytic fungi of a single mycorrhizal root can belong to a number of different fungal taxa. Fungi isolated and described includeRhizoctonia anaticulaCurrah,Thanatephorus pennatusCurrah,Leptodontidium orchidicolaSigler and Currah,Phialocephala fortiniiWang and Wilcox, and two unnamed isolates ofRhizoctonia.
Funding Information
  • Royal Society of Canada (TO1014)