Structure, Function, and Regulation of the Circadian Clock in Plants

A special issue of Cells (ISSN 2073-4409). This special issue belongs to the section "Plant, Algae and Fungi Cell Biology".

Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 1313

Special Issue Editor


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Guest Editor
1. Department of Genetics, Faculty of Science and Informatics, University of Szeged, H-6726 Szeged, Hungary
2. Institute of Plant Biology, Biological Research Centre, H-6726 Szeged, Hungary
Interests: plants; Arabidopsis thaliana; light-regulated gene expression; photoreceptors; photomorphogenesis; circadian clock; clock-regulated gene expression; flowering time; photoperiodism
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Special Issue Information

Dear Colleagues,

Although the first circadian experiment was conducted using plants (de Mairan, 1729), research on the structure, function, and regulatory mechanisms of the plant circadian oscillator have lagged behind the exploration of such clocks in fungal, insect, and mammalian systems. However, despite this slow start, we have witnessed a boom in the field of plant circadian rhythms in the last 25 years. With this Special Issue, we would like to salute this fantastic quarter of a century, and ask for the contribution of reviews or original research papers, aiming to create a collection of exciting and high-quality publications.

Papers dealing with any aspects of the plant circadian system are welcome. Mechanisms of light/temperature entrainment, the refinement of regulatory loops, and novel examples of the daily regulation of vital physiological processes are just a few areas to be mentioned. Though most of the available data are from Arabidopsis, novel results or comprehensive reviews on the clockwork of any species of the plant kingdom are welcome, from unicellular algae to crop plants.

I look forward to receiving your valuable manuscripts. 

Kind regards,
Dr. László Kozma-Bognár
Guest Editor

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Keywords

  • plants
  • circadian clock
  • chronobiology
  • entrainment
  • clock-controlled processes

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Published Papers (1 paper)

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Research

17 pages, 10948 KiB  
Article
LIP1 Regulates the Plant Circadian Oscillator by Modulating the Function of the Clock Component GIGANTEA
by Anita Hajdu, Dóra Nyári, Kata Terecskei, Péter Gyula, Éva Ádám, Orsolya Dobos, Zsuzsanna Mérai and László Kozma-Bognár
Cells 2024, 13(17), 1503; https://doi.org/10.3390/cells13171503 - 8 Sep 2024
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Abstract
Circadian clocks are biochemical timers regulating many physiological and molecular processes according to the day/night cycles. The function of the oscillator relies on negative transcriptional/translational feedback loops operated by the so-called clock genes and the encoded clock proteins. Previously, we identified the small [...] Read more.
Circadian clocks are biochemical timers regulating many physiological and molecular processes according to the day/night cycles. The function of the oscillator relies on negative transcriptional/translational feedback loops operated by the so-called clock genes and the encoded clock proteins. Previously, we identified the small GTPase LIGHT INSENSITIVE PERIOD 1 (LIP1) as a circadian-clock-associated protein that regulates light input to the clock in the model plant Arabidopsis thaliana. We showed that LIP1 is also required for suppressing red and blue light-mediated photomorphogenesis, pavement cell shape determination and tolerance to salt stress. Here, we demonstrate that LIP1 is present in a complex of clock proteins GIGANTEA (GI), ZEITLUPE (ZTL) and TIMING OF CAB 1 (TOC1). LIP1 participates in this complex via GUANINE EX-CHANGE FACTOR 7. Analysis of genetic interactions proved that LIP1 affects the oscillator via modulating the function of GI. We show that LIP1 and GI independently and additively regulate photomorphogenesis and salt stress responses, whereas controlling cell shape and photoperiodic flowering are not shared functions of LIP1 and GI. Collectively, our results suggest that LIP1 affects a specific function of GI, possibly by altering binding of GI to downstream signalling components. Full article
(This article belongs to the Special Issue Structure, Function, and Regulation of the Circadian Clock in Plants)
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