1. The mycorrhiza-like Basidiomycete S

2. Key words: allelopathy, Empetrum hermaphroditum, forestry, mycorrhiza, nitrogen.

3. Mycorrhiza was used in one field but not in the other.

4. The black rectangle is the plot from which the mycorrhiza was added.

5. Transmission electron microscopy observations performed with cytochemical stains to detect polysaccharides and cysteine-rich proteins have been done to study the effect of an auxin transport inhibitor (2,3,5-triiodobenzoic acid, TIBA) on Laccaria bicolor (Marie) Orton. hypha attachment and aggregation during mycorrhiza formation in Picea abies (L.) Karst. roots.