Extracellular phospholipase, protease and hemolysin production by strains of opportunistic yeasts from the excreta of Mew Gulls breeding in natural and urban habitats.

Extracellular hydrolytic activity (phospholipase, protease and hemolysin production) was evaluated in 178 strains of potentially pathogenic ascomycetous (Candida parapsilosis, Candida tropicalis) and basidiomycetous (Rhodotorula mucilaginosa) yeasts isolated from the excreta of Mew Gulls. Two bird colonies, one nesting in a natural habitat and the other in an urban habitat at the landfill, were studied simultaneously during their 7-month breeding season. Significant differences in phospholipase and protease production were found between natural and anthropophized strains.

Description of Wickerhamia europaea sp. nov. and revisitation of the ascospore number of W. fluorescens.

During the course of two independent studies, six conspecific yeast strains were recovered from flowers, soil, bird faeces and wood of different geographical origins. The six strains share identical DNA sequences in two barcoding regions, the D1/D2 domain of the LSU rRNA gene and the internal transcribed spacer (ITS) region (ITS1-5.8S rRNA gene-ITS2).

Seasonal Dynamics of Culturable Yeasts in Ornithogenically Influenced Soils in a Temperate Forest and Evaluation of Extracellular Enzyme Secretion in at Different Temperatures.

The culturable yeast communities in temperate forest soils under the ornithogenic influence were studied in a seasonal dynamic. To investigate the intense ornithogenic influence, conventional and "live" feeders were used, which were attached to trees in the forest and constantly replenished throughout the year. It was found that the yeast abundance in the soil under strong ornithogenic influence reached the highest values in winter compared to the other seasons and amounted to 4.

Phytotoxic Strains of Isolated from Truffles.

Most species are known as endophytes and/or phytopathogens of higher plants and have a worldwide distribution. Recently, information discovered with molecular tools has been also published about the presence of these fungi in the microbiome of truffle fruiting bodies. In the present work, we isolated and identified three strains from truffle fruiting bodies.

Culturable yeast diversity in urban topsoil influenced by various anthropogenic impacts.

In urban ecosystems, processes associated with anthropogenic influences almost always lead to changes in soil micromycete complexes. The taxonomic structure of soil micromycete complexes is an important informative parameter of soil bioindication in the ecological control of urban environments. Unicellular fungi, such as culturable yeasts, are a very suitable and promising object of microbiological research for monitoring urban topsoil.

Taxogenomic placement of Rasporella oleae and Rasporella dianae gen. and spp. nov., two insect associated yeast species.

During the course of independent studies in Europe, North America, and Africa, seven yeast strains were isolated from insect frass, decaying wood, tree flux, and olive oil sediment. Phylogenetic analysis of two barcoding DNA regions (internal transcribed spacer and the D1/D2 domain of the LSU rRNA gene) revealed that they belong to two closely related undescribed species distinct from all genera in the family Debaryomycetaceae. For reliable taxonomic placement the genomes of four strains of the two novel species and six type strains of closely related species were sequenced.

Wild and partially synanthropic bird yeast diversity, in vitro virulence, and antifungal susceptibility of Candida parapsilosis and Candida tropicalis strains isolated from feces.

Yeast complexes in the fecal samples of wild (Dendrocopos major, Picus viridis) and partially synanthropic (Bombycilla garrulus, Garrulus glandarius, Pica pica, and Pyrrhula pyrrhula) birds were studied in a forest ecosystem during winter. A total of 18 yeast species were identified: 16 ascomycetes and two basidiomycetes belonging to five subphyla of fungi: Saccharomycotina (15), Pezizomycotina (1), Agaricomycotina (1), and Pucciniomycotina (1). Most yeast species were found in the fecal samples of P.

The role of fruits as reservoirs for resistant and virulent strains of opportunistic yeasts.

Strains of the Candida parapsilosis and Meyerozyma guilliermondii species complexes isolated from the internal tissues of 26 fruit species from 21 countries were evaluated for their susceptibility to conventional antifungal compounds (fluconazole, voriconazole, amphotericin B) and hydrolytic activity. A total of 144 strains were studied. Resistance to at least one of the antifungal compounds tested was found in 26.

Yeasts associated with mines on tree leaves in the urban areas.

Mines on tree leaves and undamaged leaves were studied to investigate yeast complexes in urban areas (Aesculus hippocastanum, miner - Cameraria ohridella; Betula verrucosa, miner - Caloptilia betulicola; Populus nigra, miner - Lithocolletis populifoliella; Quercus robur, miner - Tischeria companella; Salix caprea, miner - Trachys minuta; Syringa vulgaris, miner - Caloptilia syringella; Tilia cordata, miner - Phyllonorycter issikii; Ulmus laevis, miner - Carpatolechia fugitivella). The abundance and taxonomic structure of yeasts were studied using a surface plating method on solid media (GPY agar). Identification of yeast species was based on the ITS rDNA nucleotide sequence.

Detection of Naganishia albida Yeasts in Dermatological Patients.

The yeasts Cryptococcus albidus (Naganishia albida) usually occur on natural substrates and rarely are the etiological factor of different mycoses. More than a half of mycosis cases described in the literature were reported during the period from 2004 to 2021. In this regard, evaluation of yeast sensitivity to antimycotic drugs is as important as their identification.

Diversity of Endophytic Yeasts from Agricultural Fruits Positive for Phytohormone IAA Production.

This study reports the diversity of cultivable endophytic yeasts from agricultural fruits that respond positively to the plant-promoting property of indole-3-acetic acid (IAA) production. The IAA synthesis by the strains was quantified with an Agilent 1100 series liquid chromatography system. IAA was present in the culture liquid of 72% of all 97 strains examined after three days of cultivation.

Changes in urban soil yeast communities after a reduction in household waste during the COVID-19 pandemic.

The soils of streets, urban parks and suburban areas were examined for yeasts in the summer of 2020 on the territory of the southern cities of Russia and the Republic of Crimea: Krasnodar, Maykop, Sochi and Simferopol. The results of this study are compared with the results of a previous study carried out in these cities in 2019. This study was conducted three months after the lockdown due to the COVID-19 pandemic, which led to a sustained decline in household waste deposition in these areas.

Fungal Planet description sheets: 1284-1382.

Novel species of fungi described in this study include those from various countries as follows: , from coastal sea sand. , on soil, on dead wood, from roots and leaves of and from capsules of , (incl. gen.

Fungal Planet description sheets: 1112-1181.

Novel species of fungi described in this study include those from various countries as follows: , on soil, on leaves of on leaves of on leaves of sp., on soil, (incl. gen.

Nomenclatural issues concerning cultured yeasts and other fungi: why it is important to avoid unneeded name changes.

The unambiguous application of fungal names is important to communicate scientific findings. Names are critical for (clinical) diagnostics, legal compliance, and regulatory controls, such as biosafety, food security, quarantine regulations, and industrial applications. Consequently, the stability of the taxonomic system and the traceability of nomenclatural changes is crucial for a broad range of users and taxonomists.

Fungal Planet description sheets: 1182-1283.

Novel species of fungi described in this study include those from various countries as follows: , from , from soil. , as endophyte from healthy leaves of , in fruit of , from stem of , on stems of , from rhizosphere soil of , on living leaves of , , and on living leaves of sp. , from soil.

sp. nov., a novel ascomycetous yeast species associated with the Georgian honeysuckle ( M. Bieb.).

During an investigation of the yeast communities associated with wild fruit shrubs in Dagestan (Caucasus, Russia), four fermenting ascospore-producing yeast strains were isolated from leaves of the Georgian honeysuckle ( M. Bieb.) and from soil underneath this plant.

Fungal Planet description sheets: 1042-1111.

Novel species of fungi described in this study include those from various countries as follows: , from marine sediment sand. , (incl. gen.

Yeasts in Feces of Pigeons (Columba livia) in the City of Moscow.

The yeast number and species diversity in feces of pigeons (Columba livia) were studied in various locations of the city of Moscow: parks, playgrounds and school grounds. The total number and species composition of yeasts in feces depended on the isolation temperature. The average yeast number at a cultivation temperature of 25 °C was 3.

f.a., sp. nov., an ascomycetous yeast isolated from coconuts.

During studies on the endophytic yeast communities associated with fruits from Vietnam, three fermenting yeast strains were isolated from fruits of the coconut palm (). Phylogenetic analysis based on the sequences of the ITS regions and D1/D2 domains of the large subunit rRNA gene showed that these strains represented a single species of the clade that was distinct from the other related species. The new species represented a basal branch of the clade formed by the species i.

Yeasts affect tolerance of Drosophila melanogaster to food substrate with high NaCl concentration.

The ability of model animal species, such as Drosophila melanogaster, to adapt quickly to various adverse conditions has been shown in many experimental evolution studies. It is usually assumed by default that such adaptation is due to changes in the gene pool of the studied population of macroorganisms. At the same time, it is known that microbiome can influence biological processes in macroorganisms.

Fungal Planet description sheets: 868-950.

Novel species of fungi described in this study include those from various countries as follows: , and on leaves, , and on leaves, and on leaves, on leaves, on litter of regenerating subtropical rainforest, (incl. gen. nov.

Micromycetes as colonizers of mineral building materials in historic monuments and museums.

Complex of microfungi colonizing mineral building materials, i.e. limestone and plaster, in interiors of cultural heritage was characterized.