Cytoskeleton and mitochondrial morphology of saprotrophs and the pathogen Heterobasidion annosum in the presence of Suillus bovinus metabolites.

Ectomycorrhizal fungi are known to synthesize antifungal compounds both in vitro and in symbiosis with the host-plants. Culture filtrates of the ectomycorrhizal fungus Suillus bovinus (at pHs of 2.5-6) showed antifungal activity towards saprotrophs Trichoderma harzianum, and Trichoderma virens and the pathogen Heterobasidion annosum, by significantly suppressing their growth relative to sterile liquid medium at the same pHs.

Conidia of Trichoderma virens as a phosphorus source for mycorrhizal Pinus sylvestris seedlings.

In this study, the mobilization and further translocation of phosphorus from conidia of saprotrophic fungus Trichoderma virens into Pinus sylvestris seedlings by nondestructive measuring of (32)P was assessed. The radioactive phosphorus flux from the conidia to the Scots pine seedlings forming mycorrhiza with Laccaria laccata and Suillus bovinus amounted up to 27.82% and 7.

Influence of autoclaved saprotrophic fungal mycelia on proteolytic activity in ectomycorrhizal fungi.

The production of proteolytic enzymes by several strains of ectomycorrhizal fungi i.e., Amanita muscaria (16-3), Laccaria laccata (9-12), L.

Synthesis of enzymes connected with mycoparasitism by ectomycorrhizal fungi.

The production of enzymes involved in mycoparasitism by several strains of ectomycorrhizal fungi: Amanita muscaria (16-3), Laccaria laccata (9-12), L. laccata (9-1), Suillus bovinus (15-4), S. bovinus (15-3), S.

Behaviour of the hyphae of Laccaria laccata in the presence of Trichoderma harzianum in vitro.

The growth rate and the behaviour of Laccaria laccata and Trichoderma harzianum hyphae in co-culture and in the rhizosphere of 3-month-old Pinus sylvestris seedlings grown in vitro were investigated. In the interaction zone, hyphae of L. laccata became more pigmented and formed short branches growing towards the hyphae of the saprobic fungus, coiled around them and penetrated sporadically.

In vitro evidence of mycoparasitism of the ectomycorrhizal fungus Laccaria laccata against Mucor hiemalis in the rhizosphere of Pinus sylvestris.

Interactions between the ectomycorrhizal fungus Laccaria laccata and the soil fungus Mucor hiemalis f. hiemalis in co-culture, and in the rhizosphere of in vitro-grown Pinus sylvestris seedlings were investigated by light- and scanning electron-microscopy. In co-culture, mycelial growth away from the L.

Intraspecific variation in Heterobasidion annosum for mortality rate on Pinus sylvestris and Picea abies seedlings grown in pure culture.

One-month-old Scots pine (Pinus sylvestris) and Norway spruce (Picea abies) seedlings were inoculated in vitro with Heterobasidion annosum strains, four each of the P-, S- and F-intersterility groups. Variation among strains and between the IS groups in virulence, expressed in mortality rate, was detected during twelve months after inoculation. Most of the strains were more virulent on spruce than on pine, and mortality of spruce seedlings was significantly higher.

Interaction between Laccaria laccata and Trichoderma virens in co-culture and in the rhizosphere of Pinus sylvestris grown in vitro.

Interactions between the ectomycorrhizal fungus Laccaria laccata and the soil fungus Trichoderma virens in co-culture and in the rhizosphere of Pinus sylvestris seedlings growing in vitro were investigated by light and scanning electron microscopy. The growth of T. virens was inhibited in co-culture.