Seasonal changes in the structure of Picea obovata mycorrhizas in the middle taiga subzone

Abstract

Seasonal changes in the occurrence frequency of fungal coats and in dimensional anatomical characters of ectomycorrhizal endings in the roots of Siberian spruce have been studied in two middle taiga phytocenoses. Twelve subtypes of fungal coats have been identified, with their occurrence frequency changing during the growing season. Seasonal fluctuations have been revealed in the dimensional anatomical charac ters of ectomycorrhizae, with the average thickness and volume proportion of fungal coats slightly increasing by the end of the growing season.