Multiple mycorrhizal associations of individual calcicole host plants in the alpine grass-heath zone

Summary Mycorrhizal colonization of the fibrous roots of alpine grasses and perennial herbs in microhabitats on rendzina soil were examined. Various host plants were associated simultaneously with more than one species of vesicular-arbuscular mycorrhizal fungi. All dominant graminoids had a high degree of endomycorrhizal infection. Septate endophytes (Phialophora sp., Rhizoctonia sp.) often occurred together with Acaulospora sp., Glomus tenue, G. tortuosum and Scutelispora calospora on individual hosts.