Kingdom-wide comparison reveals the evolution of diurnal gene expression in Archaeplastida
Kingdom-wide comparison reveals the evolution of diurnal gene expression in Archaeplastida
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DOI：
10.1038/s41467-019-08703-2
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发表时间：
2019-02-13
影响因子：
16.6
通讯作者：
Mutwil, Marek
中科院分区：
文献类型：
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作者：
Ferrari, Camilla;Proost, Sebastian;Mutwil, Marek
植物通过建立复杂的转录程序来协调对外部环境的许多代谢、生理和发育反应，从而适应昼夜的光暗循环。这些转录程序只在少数物种中被研究过，它们在藻类和植物中的功能和保存目前尚不清楚。我们对九种古塑菌的昼夜周期进行了比较转录组分析，我们观察到，尽管存在较大的系统发育距离和形态和生活方式的巨大差异，但这些生物的昼夜转录程序是相似的。在单细胞藻类中，与细胞分裂和大多数生物途径相关的基因的表达取决于一天中的时间，但我们在多细胞陆地植物的组织水平上没有观察到这种模式。因此，我们的研究为昼夜基因表达的普遍性提供了证据，并阐明了其在不同光合真核生物中的进化史。
Plants have adapted to the diurnal light-dark cycle by establishing elaborate transcriptional programs that coordinate many metabolic, physiological, and developmental responses to the external environment. These transcriptional programs have been studied in only a few species, and their function and conservation across algae and plants is currently unknown. We performed a comparative transcriptome analysis of the diurnal cycle of nine members of Archaeplastida, and we observed that, despite large phylogenetic distances and dramatic differences in morphology and lifestyle, diurnal transcriptional programs of these organisms are similar. Expression of genes related to cell division and the majority of biological pathways depends on the time of day in unicellular algae but we did not observe such patterns at the tissue level in multicellular land plants. Hence, our study provides evidence for the universality of diurnal gene expression and elucidates its evolutionary history among different photosynthetic eukaryotes.