Influence of extreme ambient temperatures and anaerobic conditions on Peltigera aphthosa (L.) Willd. viability.

Lichen are symbiotic systems constituted by heterotrophic fungi (mycobionts) and photosynthetic microorganism (photobionts). These organisms can survive under extreme stress conditions. The aim of this work was to study the influence of low (-70 °C) or high (+70 °C) temperatures, temperature fluctuations from +70 °C to -70 °C, and anaerobic conditions on P.

[Report of Quambalaria cyanescens associated with birch].

Long-term microbiological investigation of the pollen of silver birch (Betula pendula) in the Mos- cow, and Moscow region areas revealed that: almost one-third of the analyzed samples, contained the fungus identified by morphological, cultural, and molecular genetic techniques as Quambalaria cyanescens (de Hoog & G. A. de Vries) Z.

[Endomembrane system of fungi: traditional and modern conceptions].

The review is devoted to the endomembrane system in Fungi, which is mostly presented in cell by membrane organelles, taking part in exo- and endocytosis. Main tenets of the modern model of exo- and endocytosis are covered by the example of the apical cells of filamentous fungi. Particular attention is given to studies of endomembrane system, which were carried out by electron microscopy in the last century--the era in science preceding the prevalence of methods of fluorescence microscopy, immune and molecular genetic tagging.

[Differentiation of closely related oyster fungi Pleurotus pulmonarius and P. ostreatus by mating and molecular markers].

Classical matings and RAPD-PCR analysis were used to differentiate two closely related basidial fungi, Pleurotus pulmonarius and P. ostreatus, which are widespread in Russian forest biocenoses with moderate climate. Monokaryon-monokaryon (mon-mon) and dikaryon--monokaryon (di-mon) matings demonstrated complete reproductive isolation of the two species, which have partly overlapping morphological traits.

[Comparative analysis of Pleurotus ostreatus natural isolates].

A comparative analysis is performed of the polymorphism of the Pleurotus ostreatus (Fr.) Kumm naturally occurring strains isolated from the natural substrates found in two geographically remote Russian natural preserves, the Central Arboreal Biosphere Tver State Preserve (CABTSP) and the Moscow State University Zvenigorod Biological Station (ZBS, Moscow oblast), and within the city of Moscow. The results of the frequency analysis for the isozyme loci alleles and for the sexual and vegetative incompatibility groups are presented; the genetic structure and the interpopulation relations among 58 P.