多组学整合揭示了海洋浮游植物分子节律的光周期可塑性

Ana B Romero-Losada, Christina Arvanitidou, M Elena García-Gómez, María Morales-Pineda, M José Castro-Pérez, Yen Peng Chew, Gerben van Ooijen, Mercedes García-González, Francisco J Romero-Campero
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引用次数: 0

摘要

地球围绕太阳的倾斜旋转和平移在我们的星球上产生了无处不在的节奏,引起了昼夜周期的光周期变化。尽管海洋浮游植物在生态系统中起着关键作用,但其对这些周期性环境信号的反应的多组学分析在很大程度上仍未被探索。由于其细胞和基因组的简单性,我们选择了海洋皮藻牛链球菌作为模式生物。Ostreococcus被置于不同的光照条件下,以研究其对周期性环境信号的反应:夏季较长,冬季较短,恒定的光照和恒定的黑暗条件。尽管不到5%的转录组在两种恒定条件下保持振荡,但80%的转录组呈现昼夜节律性。在蛋白质组水平上观察到饮食节律性的急剧下降,39%的检测到的蛋白质振荡。在细胞周期、光合作用、类胡萝卜素生物合成、淀粉积累和硝酸盐同化等关键生理过程中,确定了光周期特异性节律。在这项研究中,转录组、蛋白质组和生理动力学之间的光周期塑料全球协调被表征,以确定转录物、蛋白质和生理反应时间之间的光周期特异性时间偏移。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multiomics integration unveils photoperiodic plasticity in the molecular rhythms of marine phytoplankton
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 less than 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.
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