IMEDEA Calendar |
When | What | Where | ||||||||||||||||||||||
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Mar 30th Abr 10:30 am 1:30 pm | Entrega de premios de los proyectos ganadores del certamen "Ocean Odyssey Challenge” del proyecto Ocean Night. IMEDEA | |||||||||||||||||||||||
Jue 2nd May 10:00 am 11:00 am | Sala de seminarios IMEDEA | |||||||||||||||||||||||
Vie 3rd May 12:00 pm 1:00 pm | AbstractSunlight drives virtually all life on the Earth’s surface, with about 50% of primary productivity occurring in marine systems. Yet, this traditional view of phototrophy changed radically with the discovery of marine bacterial rhodopsins (i.e., proteorhodopsins; PR), over twenty years ago. PRs are simple light-driven proton pumps present in over 80% of surface bacterioplankton, which allow them to transform light into biochemical energy. Combining culture-based physiology studies with (meta)-genomics, (meta)-transcriptomics, and environmental quantifications we are just starting to understand the role that PR-based photoheterotrophy plays in the ocean. In this presentation, I will discuss the knowns and unknowns of PR-phototrophy and what we are starting to learn from looking at its natural distributions in different oceanographic basins, ranging from extreme ultraoligotrophic regions to high productivity environments Sala de seminarios IMEDEA | |||||||||||||||||||||||
Lun 6th May | TREC Sequencing Course Mallorca Introductory course to Next Generation Sequencing tecniques organized within the Maria de Maeztu Programme in collaboration with EMBL. ScheduleMay 6th 2024 Monday
Wet lab lectures
May 7th 2024 Tuesday
Dry lab lectures
Sala de Seminarios, IMEDEA | |||||||||||||||||||||||
Lun 6th May 2:00 pm 4:00 pm | Curso Base Programacion Sala reuniones 3 | |||||||||||||||||||||||
Mar 7th May 12:00 pm 1:00 pm | SEMINARIO JB Raina (UT Sydney) - Uncovering complex chemically mediated microbial behaviours Abstract The ability of marine bacteria to direct their movement in response to chemical gradients influences inter-species interactions, nutrient turnover, and ecosystem productivity. While natural chemical hotspots produce gradients comprised of hundreds to thousands of different chemical compounds, we do not know how this chemical diversity affects the chemotactic responses of bacteria. I will present results from two studies that reveal some unexpected responses when bacteria are exposed to complex chemical mixtures. Using in situ and laboratory-based assays, we show that marine bacteria are strongly attracted to the abundant algal polysaccharide laminarin, but chemotaxis towards this large molecule is enhanced by dimethylsulfoniopropionate (DMSP), another ubiquitous algal-derived metabolite. Our results indicate that DMSP acts as a methyl donor for marine bacteria, increasing their gradient detection capacity and facilitating their access to polysaccharide patches. Using a novel chemotaxis choice assay, we then directly expose a model marine bacterium to four potent chemoattractants simultaneously (i.e., one monosaccharide and three amino acids). Although the bacterium is strongly chemotactic to each of these molecules in isolation, when these four molecules are provided simultaneously, the cells exhibit a striking response by swimming towards only one of them. These results start shedding light on the synergistic effects (e.g., laminarin and DMSP) and sharp chemical preferences modulating the behaviours of bacteria. Sala de Reuniones, 2ª planta, IMEDEA |