1. Annual recurrence of prokaryotic climax communities in shallow waters of the North MediterraneanMauro Celussi, Vincenzo Manna, Elisa Banchi, Viviana Fonti, Matteo Bazzaro, Vesna Flander-Putrle, Katja Klun, Martina Kralj, Neža Orel, Tinkara Tinta, 2024, original scientific article Abstract: In temperate coastal environments, wide fluctuations of biotic and abiotic factors drive microbiome dynamics. To link recurrent ecological patterns with planktonic microbial communities, we analysed a monthly-sampled 3-year time series of 16S rRNA amplicon sequencing data, alongside environmental variables, collected at two stations in the northern Adriatic Sea. Time series multivariate analyses allowed us to identify three stable, mature communities (climaxes), whose recurrence was mainly driven by changes in photoperiod and temperature. Mixotrophs (e.g., Ca. Nitrosopumilus, SUP05 clade, and Marine Group II) thrived under oligotrophic, low-light conditions, whereas copiotrophs (e.g., NS4 and NS5 clades) bloomed at higher temperatures and substrate availability. The early spring climax was characterised by a more diverse set of amplicon sequence variants, including copiotrophs associated with phytoplankton-derived organic matter degradation, and photo-auto/heterotrophic organisms (e.g., Synechococcus sp., Roseobacter clade), whose rhythmicity was linked to photoperiod lengthening. Through the identification of recurrent climax assemblages, we begin to delineate a typology of ecosystem based on microbiome composition and functionality, allowing for the intercomparison of microbial assemblages among different biomes, a still underachieved goal in the omics era.
Keywords: marine microbial ecology, coastal seas, microbial community analyses, marine biology, marine ecology
Published in DiRROS: 17.05.2024; Views: 3; Downloads: 1
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2. The role of extracellular vesicles in phenotypic cancer transformationEva Ogorevc, Veronika Kralj-Iglič, Peter Veranič, 2013, review article Abstract: Background. Cancer has traditionally been considered as a disease resulting from gene mutations. New findings in biology are challenging gene-centered explanations of cancer progression and redirecting them to the non-genetic origins of tumorigenicity. It has become clear that intercellular communication plays a crucial role in cancer progression. Among the most intriguing ways of intercellular communication is that via extracellular vesicles (EVs). EVs are membrane structures released from various types of cells. After separation from the mother membrane, EVs become mobile and may travel from the extracellular space to blood and other body fluids. Conclusions. Recently it has been shown that tumour cells are particularly prone to vesiculation and that tumour-derived EVs can carry proteins, lipids and nucleic acids causative of cancer progression. The uptake of tumour-derived EVs by noncancerous cells can change their normal phenotype to cancerous. The suppression of vesiculation could slow down tumour growth and the spread of metastases. The purpose of this review is to highlight examples of EV-mediated cancer phenotypic transformation in the light of possible therapeutic applications.
Published in DiRROS: 03.04.2024; Views: 119; Downloads: 162
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3. Short term effect of plant hybridosomes on growth of phaeodactylum tricornutum cultureAnna Romolo, Matej Hočevar, Aleš Iglič, Tjaša Griessler Bulc, Veronika Kralj-Iglič, 2023, published scientific conference contribution Keywords: Phaeodactylum tricornutum, hybridosomes, liposomes, nanoalgosomes, extracellular vesicles, small cellular particles, microalgae
Published in DiRROS: 21.03.2024; Views: 122; Downloads: 60
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8. Scanning electron microscope images of isolates of small cellular particles Phaeodactylum tricornutum grown in media supplemented with Guillard’s (F/2) marine : marine water enrichment solution, BG11 broth and Lennox LB brothApolonija Bedina Zavec, Darja Božič, Matej Hočevar, Aleš Iglič, Marko Jeran, Veronika Kralj-Iglič, Anna Romolo, 2024, published scientific conference contribution Published in DiRROS: 08.03.2024; Views: 121; Downloads: 58
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