TY - JOUR T1 - Nyctinastic thallus movement in the liverwort <em>Marchantia polymorpha</em> is regulated by a circadian clock JF - bioRxiv DO - 10.1101/2020.02.09.940403 SP - 2020.02.09.940403 AU - Ulf Lagercrantz AU - Anja Billhardt AU - Sabine N. Rousku AU - D. Magnus Eklund Y1 - 2020/01/01 UR - http://biorxiv.org/content/early/2020/02/10/2020.02.09.940403.abstract N2 - The circadian clock coordinates an organism’s growth, development and physiology with environmental factors. One illuminating example is the rhythmic growth of hypocotyls and cotyledons in Arabidopsis thaliana. Such daily oscillations in leaf position are often referred to as sleep movements or nyctinasty. Here, we report that plantlets of the liverwort Marchantia polymorpha show analogous rhythmic movements of thallus lobes, and that the circadian clock controls this rhythm, with auxin a likely meditator. The mechanisms of this circadian clock are partly conserved as compared to angiosperms, with homologs to the core clock genes PRR, RVE and TOC1 forming a core transcriptional feedback loop also in M. polymorpha. ER -