Arbuscular mycorrhizal symbiosis of Acer cinerascens and effects of season variation on some rhizosphere (Case study: Bazoft, Chaharmahal-o-Bakhtiari)

Arbuscular mycorrhizas fungi (AM) are the most important microorganisms of soil having an important role in soil fertility. The symbiosis rate between AM and plants are different based on specific physiological characteristics and morphological root characteristics. Thirty individuals of Acer cinerascens grown in natural habitats located at Bazoft, Chaharmahal-o-Bakhtiari, the western forests of Iran, were chosen. Roots were sampled during spring and autumn to find out the interactions between arbuscular mycorrhizal and soil elements. Arbuscular mycorrhizal fungi were isolated and characterized by wet sieve. Then roots were stained and colonization percentage was measured. Four species of Glomus and one species of Acaulospora were identified. Significant difference was found between arbuscular mycorrhizal colonization percentage and spore frequency in spring and autumn. Significant correlation was observed between colonization percentage and availability of potassium in spring.