2026-04-17T19:05:37Zhttps://recercat.cat/oai/request

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

2025-10-20T18:48:58Z urn:hdl:10459.1/468813 Multiomics integration unveils photoperiodic plasticity in the molecular rhythms of marine phytoplankton Romero Losada, Ana Belén Arvanitidou, Christina García Gómez, Maria Elena Morales Pineda, María Castro Pérez, María José Chew, Yen Peng van Ooijen, Gerben Garcia Gonzalez, Mercedes Romero Campero, Francisco J. 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. 2025-10-20T18:48:58Z 2025-10-20T18:48:58Z 2025-02 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/10459.1/468813 Reproducció del document publicat a: https://doi.org/10.1093/plcell/koaf033 Plant Cell, 2025, vol. 37, núm. 2 cc-by, (c) Ana Belén Romero Losada et al., 2025 Attribution 4.0 International info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Oxford University Press