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Fatima Pustahija

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The accessible literature sources do not give an integrated register of non-native tree species in Bosnia and Herzegovina and western Balkans floras. Therefore, the focus of this study was on an inventory of allochthonous dendroflora in the territory of Bosnia and Herzegovina (B&H) by 2023. Numerous literature sources, the herbarium collection of the National Museum of Bosnia and Herzegovina (SARA) and the authors' field investigations were used to create the allochthonous B&H dendroflora list. The inventory list comprises dendro species of trees, shrubs and lianas. The survey consists of 552 non-native dendro taxa, associated with family, geographic origin, residence time status, degree of naturalization, zone of resistance, and abundance of the investigated taxa. A total of 82 families, 208 genera, and 552 taxa, which included species level, subspecies, varieties, and hybrids were recorded. The B&H allochthonous dendroflora generally originate from Asia (260 taxa) and North America (128), with a significant share of hybrids (81). Only 19 archaeophytes were registered. According to the degree of naturalization, it was observed that as many as 451 taxa are casual and 13 invasive. The non-native dendro species in B&H mainly belong to the USDA Hardiness Zones 4-9, 5-9 and 6-9. The alien dendroflora of B&H includes 152 occasional, 142 rare, 198 abundant and only 60 taxa with massive abundance. The presented results give a detailed insight into the allochthonous dendroflora of B&H, which is also the first such presentation for the Western Balkans.

Ajla Berberović, F. Pustahija, Samir Đug, Sonja Šiljak-Yakovlev, E. Muratović

Cirsium (thistle) is one of the most taxonomically demanding genera within the Compositae. These taxonomic difficulties are hypothesized to result from limited morphological differentiation, incipient speciation and/or hybridization among taxa, and misinterpretations of faded and incomplete herbarium specimens. According to the latest data, the Dinarides and the Eastern Alps are inhabited by the endemic, diploid, newly described species Cirsium greimleri, which often occurs in sympatry with C. rivulare and C. erisithales. The area of the related, vicarious, tetraploid, and endemic species C. waldsteinii is limited to the southeastern Carpathians. Considering that the new knowledge refutes the existence of C. waldsteinii in Bosnia and Herzegovina, it was necessary to review all C. waldsteinii data discovered so far in Bosnia and Herzegovina. The results obtained from the distribution of the species, the predictive modelling of its ecological niche, and the analysis of the genome size confirmed the existence of the species C. greimleri in Bosnia and Herzegovina and its potential hybridization. This study indicates the need for further research into the sympatry of C. greimleri and its relatives, as well as the essential taxonomic revision of this complex.

The aim of this study was to evaluate the phytotoxic, genotoxic, cytotoxic and antimicrobial effects of the Mentha arvensis L. essential oil (EO). The biological activity of M. arvensis EO depended on the analyzed variable and the tested oil concentration. Higher concentrations of EO (20 and 30 µg mL-1) showed a moderate inhibitory effect on the germination and growth of seedlings of tested weed species (Bellis perennis, Cyanus segetum, Daucus carota, Leucanthemum vulgare, Matricaria chamomilla, Nepeta cataria, Taraxacum officinale, Trifolium repens and Verbena × hybrida). The results obtained also indicate that the EO of M. arvensis has some genotoxic, cytotoxic and proliferative potential in both plant and human in vitro systems. Similar results were obtained for antimicrobial activity against eight bacteria, including multidrug-resistant (MDR) strains [Bacillus subtilis, Enterococcus faecalis, Staphylococcus aureus, methicillin-resistant S. aureus (MRSA), Escherichia coli, extended-spectrum beta-lactamase-producing (ESBL) E. coli, Pseudomonas aeruginosa and Salmonella enterica subsp. enterica serovar Enteritidis], with the effect on multidrug-resistant bacterial strains. Research indicates that the EO of M. arvensis shows phytotoxic, genotoxic, cytotoxic and antimicrobial effects, as well as its potential application as a herbicide and against various human diseases.

F. Pustahija, N. Bašić, S. Siljak-Yakovlev

Narcissus poeticus L. (Amaryllidaceae), a facultative serpentinophyte, is a highly variable species and particularly important ancestor of cultivated daffodils, but is rarely studied in field populations. This study, based on natural populations in the Balkans, focused on karyotype variability, genome size, ploidy and the presence of B chromosomes. Thirteen native populations from different environmental and soil conditions were collected and analyzed using flow cytometry to estimate nuclear genome size, fluorescence in situ hybridization (FISH) for physical mapping of rDNA, fluorochrome labeling (chromomycin and Hoechst) for heterochromatin organization and silver nitrate staining of nucleoli for determining rRNA gene activity. The organization of rDNA and natural triploids is reported here for the first time. The presence of individuals with B chromosomes (in 9/13 populations) and chromosomal rearrangements was also detected. The observed B chromosome showed three different morphotypes. The most frequent submetacentric type showed four different patterns, mainly with active ribosomal genes. The results obtained show that N. poeticus has a dynamic genome with variable genome size due to the presence of polyploidy, B chromosomes and chromosomal rearrangements. It is hypothesized that the observed changes reflect the response of the genome to different environmental conditions, where individuals with B chromosomes appear to have certain adaptive advantages.

F. Pustahija, Sabina Rastoder, R. Duraković, M. Subašić, N. Bašić, A. Parić

Genus Silene (Caryophyllaceae) is very rich in secondary metabolites and has an antiviral, antimalarial, antitumor, antibacterial and antioxidant properties, but Balkan endemic Silene sendtneri (Sendtner's campion) is not analyzed from the aspect of phenolic composition and their biological activities. Evaluation of total phenolic contents (TPC) and total flavonoid contents (TFC), and antioxidant and antimicrobial activities of hydromethanolic extracts from inflorescences, stem, rhizome, and seeds of S. sendtneri, was done in this study for the first time. The TPC, TFC, and antioxidant activity (DPPH; 2,2-diphenyl-1-picrylhydrazyl) were determined by UV/VIS spectrophotometry. Antimicrobial activity was estimated against selected test microorganisms (Staphylococcus epidermididis, Staphylococcus aureus subsp. aureus, Salmonella abony, Escherichia coli, and Candida albicans) using a disc diffusion assay. The inflorescences had the highest (11.587 mg GAEg-1 DW) and rhizome the lowest TPC (2.017 mg GAEg-1 DW). The inflorescences extract exhibited the highest TFC (69.824 mg CEg-1 DW), while TFC was not detected in the rhizome extract. The stem’s extract had the highest antioxidant activity (IC50; 20.51%), while the rhizome had the lowest (61.89%). All extracts showed moderate antibacterial activity against Staphylococcus epidermididis and low activity against the three remaining tested organisms. Antifungal activity of inflorescence and rhizome extracts was moderate. Obtained results provide a basis for further investigations of various S. sendtneri extracts, which can be a potential natural antioxidant and antimicrobial agents

UDK: 582.661.51:631.53.027]:547.913 In order to investigate the effects of seed priming with silver fir and oregano essential oils on certain important seedling characteristic and seed vigour of interesting endemic and horticultural species Silene sendtneri, an experiment was conducted based on randomized completely design with three replications. Traits such as germination rate, water content, dry weight, vigour index and photosynthetic pigments were analysed. Results revealed that the seedlings obtained with priming seeds showed increased growth, water content, vigour and photosynthetic pigment contents but decreased germination rate and dry weight compared with that obtained with non-primed seeds. Analysis of seed priming effects had demonstrated even germination rate is smaller the seedling vigour is slightly higher especially with all oregano oil treatments. We suggest that oregano oil has a potential as a priming agent for improvement of seedling synchrony, although at lower rate of germination.

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