2026-06-21T04:28:20Z https://icatplus.esrf.fr/oaipmh/request

oai:icatplus.esrf.fr:inv/930328369 2022-11-01T07:00:24.666Z

4.2 EI 10.15151/ESRF-ES-930328369 Serena FLORI Serena Flori 0000-0003-3407-2785 Luis Carlos COLOCHO HURTARTE Luis Carlos Colocho Hurtarte 0000-0002-1791-2298 Serena FLORI Serena Flori 0000-0003-3407-2785 Giulia VERONESI Giulia Veronesi 0000-0001-9228-6082 Giulia VERONESI Giulia Veronesi 0000-0001-9228-6082 Example Institute 2025 Data from large facility measurement 2022-10-27T14:00:00Z/2022-11-01T07:00:00Z 2022-11-01T07:00:00Z I CC-BY-4.0 In eukaryotes, calcium (Ca2+) is a key secondary messenger that regulates diverse physiological processes. Abiotic and biotic stress, such as pathogen attacks, osmotic or oxidative stress, result in an increase in cytoplasmic Ca2+ concentration, which empowers an immediate signal transduction pathway. In this contest, in plants, changes in light regimes have been described to generate Ca2+ transients in the cytosol followed by a long lasting wave in the chloroplast. For phytoplanktonic cells, light play a pivotal role on their survival and for the chimeric diatoms (key component of the phytoplankton, originated by a secondary endosymbiosis, in contrast to plants) we suggest an alternative Ca2+ signaling pathways from those identified so far. This proposal aims at unveiling the natural subcellular distribution of Ca2+ in diatoms using synchrotron X-ray fluorescence (SXRF) and to assess the element requirements during light acclimation.