RT Journal Article
SR Electronic
T1 Nyctinastic thallus movement in the liverwort <em>Marchantia polymorpha</em> is regulated by a circadian clock
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2020.02.09.940403
DO 10.1101/2020.02.09.940403
A1 Lagercrantz, Ulf
A1 Billhardt, Anja
A1 Rousku, Sabine N.
A1 Eklund, D. Magnus
YR 2020
UL http://biorxiv.org/content/early/2020/02/10/2020.02.09.940403.abstract
AB 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.