Acaulospora rehmii and Gigaspora margarita, arbuscular mycorrhizal fungi (Glomeromycota) new for Europe and Poland, respectively

Abstract

Morphological characters of spores of <em>Acaulospora rehmii</em> and <em>Gigaspora margarita</em> (Glomeromycota) were described and illustrated. Spores of the two species were found in field-collected mixtures of rhizosphere soil and roots collected in Poland. Attempts to produce spores in trap cultures succeeded only with <em>G. margarita</em>. All attempts to establish one-species cultures of the two fungi failed. <em>Gigaspora margarita</em> was for the first time found in Poland and this paper is the first report of the occurrence of <em>A. rehmii</em> in Europe. The known distribution of the two fungal species in the world is also presented.