Almost all organisms coordinate some aspects of their biology through the diurnal cycle. Photosynthetic organisms, and plants especially, have established complex programs that coordinate physiological, metabolic and developmental processes with the changing light. The diurnal regulation of the underlying transcriptional processes is observed when groups of functionally related genes (gene modules) are expressed at a specific time of the day. However, studying the diurnal regulation of these gene modules in the plant kingdom was hampered by the large amount of data required for the analyses. To meet this need, we used gene expression data from 17 diurnal studies spanning the whole Archaeplastida kingdom (Plantae kingdom in the broad sense) to make an online diurnal database. We have equipped the database with tools that allow user-friendly cross-species comparisons of gene expression profiles, entire co-expression networks, co-expressed clusters (involved in specific biological processes), time-specific gene expression and others. We exemplify how these tools can be used by studying three important biological questions: (i) the evolution of cell division, (ii) the diurnal control of gene modules in algae and (iii) the conservation of diurnally controlled modules across species. The database is freely available at http://diurnal.plant.tools.

中文翻译：

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Diurnal.plant.tools：古细菌王国昼间基因表达的转录组和共表达分析。

几乎所有生物都通过昼夜周期协调其生物学的某些方面。光合生物，特别是植物，已经建立了复杂的程序，可以随着光线的变化来协调生理，代谢和发育过程。当一组功能相关基因（基因模块）在一天的特定时间表达时，观察到了潜在的转录过程的昼夜调节。然而，研究所需的大量数据阻碍了在植物界研究这些基因模块的昼夜调控。为了满足这一需求，我们使用了横跨整个古细菌界（广义上为Plantae王国）的17项昼间研究的基因表达数据，以建立在线昼夜数据库。我们为数据库配备了工具，可对各种基因表达谱，整个共表达网络，共表达的簇（涉及特定的生物过程），特定时间的基因表达等进行友好的跨物种比较。我们通过研究三个重要的生物学问题来举例说明如何使用这些工具：（i）细胞分裂的进化；（ii）藻类中基因模块的昼夜控制；（iii）跨物种的昼夜控制模块的保存。该数据库可从http://diurnal.plant.tools免费获得。（i）细胞分裂的进化；（ii）藻类中基因模块的昼夜控制；（iii）跨物种的昼夜控制模块的保存。该数据库可从http://diurnal.plant.tools免费获得。（i）细胞分裂的进化；（ii）藻类中基因模块的昼夜控制；（iii）跨物种的昼夜控制模块的保存。该数据库可从http://diurnal.plant.tools免费获得。