Synchrony of plant cellular circadian clocks with heterogeneous properties under light/dark cycles

• Okada, Masaaki

• Muranaka, Tomoaki

• Ito, Shogo

• Oyama, Tokitaka

Abstract

Individual cells in a plant can work independently as circadian clocks, and their properties are the basis of various circadian phenomena. The behaviour of individual cellular clocks in Lemna gibba was orderly under 24-h light/dark cycles despite their heterogeneous free-running periods (FRPs). Here, we reveal the entrainment habits of heterogeneous cellular clocks using non-24-h light/dark cycles (T-cycles). The cellular rhythms of AtCCA1:: LUC under T = 16 h cycles showed heterogeneous entrainment that was associated with their heterogeneous FRPs. Under T = 12 h cycles, most cells showed rhythms having similar to 24-h periods. This suggested that the lower limit of entrainment to the light/dark cycles of heterogeneous cellular circadian clocks is set to a period longer than 12 h, which enables them to be synchronous under similar to 24-h daily cycles without being perturbed by short light/dark cycles. The entrainment habits of individual cellular clocks are likely to be the basis of the circadian behaviour of plant under the natural day-night cycle with noisy environmental fluctuations. We further suggest that modifications of EARLY FLOWERING3 (ELF3) in individual cells deviate the entrainability to shorter T-cycles possibly by altering both the FRPs and light responsiveness.

Journal

• Scientific Reports

  Scientific Reports 7 317-, 2017

  Springer Nature

Keywords

• Circadian rhythms
• Plant physiology

Details

• CRID: 1050010293063988352
• NII Article ID: 120007192997
• DOI: 10.1038/s41598-017-00454-8
• ISSN: 20452322
• HANDLE: 2433/268046
• Web Site: https://www.nature.com/articles/s41598-017-00454-8.pdf
• Web Site: https://www.nature.com/articles/s41598-017-00454-8
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN