2026-04-14T06:14:16Zhttps://recercat.cat/oai/request

oai:recercat.cat:10459.1/4688132025-10-20T18:48:58Zcom_2072_3622col_2072_479130

00925njm 22002777a 4500 dc Romero Losada, Ana Belén author Arvanitidou, Christina author García Gómez, Maria Elena author Morales Pineda, María author Castro Pérez, María José author Chew, Yen Peng author van Ooijen, Gerben author Garcia Gonzalez, Mercedes author Romero Campero, Francisco J. author 2025-02 Earth's tilted rotation and translation around the Sun produce pervasive rhythms on our planet, giving rise to photoperiodic changes in diel cycles. Although marine phytoplankton plays a key role in ecosystems, multiomics analysis of its responses to these periodic environmental signals remains largely unexplored. The marine picoalga Ostreococcus tauri was chosen as a model organism due to its cellular and genomic simplicity. Ostreococcus was subjected to different light regimes to investigate its responses to periodic environmental signals: long summer days, short winter days, constant light, and constant dark conditions. Although <5% of the transcriptome maintained oscillations under both constant conditions, 80% presented diel rhythmicity. A drastic reduction in diel rhythmicity was observed at the proteome level, with 39% of the detected proteins oscillating. Photoperiod-specific rhythms were identified for key physiological processes such as the cell cycle, photosynthesis, carotenoid biosynthesis, starch accumulation, and nitrate assimilation. In this study, a photoperiodic plastic global orchestration among transcriptome, proteome, and physiological dynamics was characterized to identify photoperiod-specific temporal offsets between the timing of transcripts, proteins, and physiological responses. http://hdl.handle.net/10459.1/468813 Multiomics integration unveils photoperiodic plasticity in the molecular rhythms of marine phytoplankton