BIOREpository (Faculty of Biology, University of Belgrade)
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Characterisation of T3SS-positive non-pathogenic Pseudomonas strains: plant growth promotion, induced systemic resistance in sugar beet (Beta vulgaris L.) and effector repertoires
No full textAbstract book, 12M6
Sexual dimorphism in size and shape of morphological traits in Drosophila simulans (Diptera: Drosophilidae): geometric morphometric approach
No full textBook of Abstracts, p. 22M3
Remyella spanovicae Ćurčić, Vrbica & Vesović sp. nov., a new troglobitic leiodid beetle (Coleoptera: Leiodidae: Leptodirini) from southwestern Serbia
No full textThe genus Remyella Jeannel, 1931 consists of stenoendemic troglobitic leiodid beetles restricted to subterranean habitats in southwestern Serbia and northeastern Montenegro. A new subterranean leiodid species, Remyella spanovicae Ćurčić, Vrbica & Vesović sp. nov., from the Pećina na Đerekarskom Vrelu Cave (village of Đerekare, near the town of Tutin, Pešter Plateau, southwestern Serbia), is described and diagnosed. All taxonomically important morphological features of the new taxon are presented, including traits of both male and female genitalia. The new species is clearly distinguished from other congeners both morphologically and molecularly. Data on the sexual dimorphism of the new species are presented. Molecular analysis confirmed that Remyella raskae S. Ćurčić & B. Ćurčić, 2008 is a valid species. A key to the identification of the species of the genus Remyella is given. In addition, the species Remyella hussoni Jeannel, 1934 was found at another subterranean site in the village of Đerekare.M221.328930799
Factors Influencing Orchid Species Richness in the Central Balkans: The Importance of Belowground Organ Types
No full textThe Balkan Peninsula is considered one of the most important centres of orchid diversity in Europe. However, the patterns of orchid species richness in the Central Balkans have not been sufficiently studied so far. The aim of this study was, therefore, to identify the centres of orchid diversity and the factors that influence the spatial variation in orchid species richness in the Central Balkans. For the analyses, the area of the Central Balkans was divided into 10 × 10 km grid cells. The environmental variables determined for each grid cell and used in the analyses were altitude, bioclimatic variables, geological substrates and habitat types. A random forest (RF) analysis was used to identify the environmental predictors most strongly associated with species richness. In addition to the total number of taxa, orchids with three belowground organ types were analysed separately: (a) rhizomatous orchids, (b) orchids with palmately lobed and fusiform tubers (“palmate tuberous orchids”) and (c) orchids with spherical or ovoid tubers (“ovoid tuberous orchids”). In the Central Balkans, 54 orchid species and subspecies have been recorded, and the most important centres of diversity are the Tara, Zvijezda, Jadovnik and Zlatar Mountains and the Ovčar-Kablar Gorge. In general, two groups of grid cells with the largest number of orchid taxa, i.e., hotspots, stood out: (1) grid cells with a large altitudinal range and (2) grid cells occupied by gorges and ravines. The most important gradients influencing orchid species richness are specific habitat types and altitudinal ranges, while climatic factors and geological substrates are less important. The most important factors affecting the richness of total and rhizomatous orchids are altitudinal range and habitat types (Abieti-Fagenion, Ostryo-Carpinion orientalis and Pinion nigrae forests), highlighting the important role of habitat heterogeneity. The maximum altitude, percentage of Abieti-Fagenion and Vaccinio-Picetea forests and the minimum value of the mean temperature of the driest quarter are the most important factors for determining the richness of palmate tuberous orchids, whereas the percentage of xero-thermophilous habitat types (Ostryo-Carpinion orientalis, Asplenietea trichomanis and Pinion nigrae) has the greatest influence on the richness of ovoid tuberous orchids. These results confirm the hypothesis concerning the origin and development of underground organs in orchids, emphasising that palmate tuberous orchids are best adapted to cold and humid habitat conditions, whereas ovoid tuberous orchids have the ability to grow in habitats with very warm and dry conditions. This study provides a good basis for better orchid conservation planning and underlines the importance of belowground strategies as a feature of orchid life history that should be considered when studying patterns of orchid diversity.M214.044314
Different Long-Term Nutritional Regimens of Drosophila melanogaster Shape Its Microbiota and Associated Metabolic Activity in a Sex-Specific Manner
No full textThe dietary habits of fruit flies profoundly influence their fitness, morphology,and physiology yet the mechanisms underlying these effects remain incompletely under-stood. To address this gap, the relationship between dietary regimens and the composition and function of adult Drosophila melanogaster microbiota was investigated in the present study. The adult fly microbiota communities that were reared for long time on five different
diets were characterized by means of 16S rRNA sequencing. Obtained results revealed
distinct community structures associated with each dietary regimen, which was additionally corroborated through machine learning-based analysis. In general, sugar-rich diets
correlate with microbial ecosystems of higher richness/diversity. Dominance of the phyla
Proteobacteria and Firmicutes in the microbiota was confirmed irrespective of diet, with the varying proportions of the most abundant families: Acetobacteraceae, Lactobacillaceae,
Moraxellaceae, Bradyrhizobiaceae, and Leucostonocaceae. Bacterial families of lower abundance also emerged as differentially present among the studied fly groups. Additionally, functional prediction provided initial clues into how nutrient availability might modulate the metabolic traits of adult fly microbiota in a sex-specific manner to meet host metabolic needs. Overall, the presented findings highlight the intricate interplay between diet, microbiota composition, and host phenotype in fruit flies, underscoring the importance of diet as a determinant of host-microbiota interactions.M212.714116
Fragilaria campyla (Bacillariophyceae) - second record of a rare diatom species in Serbia
No full textAbstract BookM6
Prevalence and emm typing of multi-drug resistant Streptococcus pyogenes in tertiary care health settings
No full textStreptococcus pyogenes causes diverse infections, including pharyngitis and invasive diseases. Emerging resistance to β-lactams and macrolide poses a significant public health threat in developing countries. This study examines the prevalence, antibiotic susceptibility, and emm types of S. pyogenes strains isolated from hospitals in Khyber Pakhtunkhwa (KP), Pakistan.M214.236425
