Ecol1103004BetekhtinaLO.fm

Abstract

Abstract-The prevalence of arbuscular mycorrhizas and abundance of mycorrhizal fungi in the roots of her baceous plants with different types of Grime-Ramenskii's ecological strategies (competitors, ruderals, and stress tolerators) have been studied in the Middle Urals. The closest association with arbuscular fungi has been observed in species with a competitive strategy. Compared to them, stress tolerant species are charac terized by lower abundance of mycorrhizal fungal hyphae in the root system, while ruderal plants include a relatively large proportion of nonmycotrophic species showing no interaction with arbuscular fungi