Phytochromes transmit photoperiod information via the evening complex in Brachypodium.

Autor: Gao M; Sainsbury Laboratory, University of Cambridge, 47 Bateman St., Cambridge, CB2 1LR, UK.; Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China., Lu Y; Leibniz-Institut für Gemüse- und Zierpflanzenbau, Theodor-Echtermeyer-Weg 1, Großbeeren, 14979, Germany., Geng F; Sainsbury Laboratory, University of Cambridge, 47 Bateman St., Cambridge, CB2 1LR, UK., Klose C; Institut für Biologie II, University of Freiburg, Schaenzlestr. 1, Freiburg, 79104, Germany., Staudt AM; Institut für Biologie II, University of Freiburg, Schaenzlestr. 1, Freiburg, 79104, Germany., Huang H; Donald Danforth Plant Science Center, St. Louis, MO, 63132, USA., Nguyen D; Sainsbury Laboratory, University of Cambridge, 47 Bateman St., Cambridge, CB2 1LR, UK., Lan H; Sainsbury Laboratory, University of Cambridge, 47 Bateman St., Cambridge, CB2 1LR, UK., Lu H; Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary, Institute of Biodiversity Science and Institute of Eco-Chongming, School of Life Sciences, Fudan University, Shanghai, China., Mockler TC; Donald Danforth Plant Science Center, St. Louis, MO, 63132, USA., Nusinow DA; Donald Danforth Plant Science Center, St. Louis, MO, 63132, USA., Hiltbrunner A; Institut für Biologie II, University of Freiburg, Schaenzlestr. 1, Freiburg, 79104, Germany.; Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Freiburg, 79104, Germany., Schäfer E; Institut für Biologie II, University of Freiburg, Schaenzlestr. 1, Freiburg, 79104, Germany.; BIOSS Centre for Biological Signalling Studies, University of Freiburg, Schaenzlestr. 18, Freiburg, 79104, Germany., Wigge PA; Sainsbury Laboratory, University of Cambridge, 47 Bateman St., Cambridge, CB2 1LR, UK. wigge@igzev.de.; Leibniz-Institut für Gemüse- und Zierpflanzenbau, Theodor-Echtermeyer-Weg 1, Großbeeren, 14979, Germany. wigge@igzev.de.; Institute of Biochemistry and Biology, University of Potsdam, Potsdam, 14476, Germany. wigge@igzev.de., Jaeger KE; Sainsbury Laboratory, University of Cambridge, 47 Bateman St., Cambridge, CB2 1LR, UK. jaeger@igzev.de.; Leibniz-Institut für Gemüse- und Zierpflanzenbau, Theodor-Echtermeyer-Weg 1, Großbeeren, 14979, Germany. jaeger@igzev.de.
Jazyk: angličtina
Zdroj: Genome biology [Genome Biol] 2023 Nov 07; Vol. 24 (1), pp. 256. Date of Electronic Publication: 2023 Nov 07.
DOI: 10.1186/s13059-023-03082-w
Abstrakt: Background: Daylength is a key seasonal cue for animals and plants. In cereals, photoperiodic responses are a major adaptive trait, and alleles of clock genes such as PHOTOPERIOD1 (PPD1) and EARLY FLOWERING3 (ELF3) have been selected for in adapting barley and wheat to northern latitudes. How monocot plants sense photoperiod and integrate this information into growth and development is not well understood.
Results: We find that phytochrome C (PHYC) is essential for flowering in Brachypodium distachyon. Conversely, ELF3 acts as a floral repressor and elf3 mutants display a constitutive long day phenotype and transcriptome. We find that ELF3 and PHYC occur in a common complex. ELF3 associates with the promoters of a number of conserved regulators of flowering, including PPD1 and VRN1. Consistent with observations in barley, we are able to show that PPD1 overexpression accelerates flowering in short days and is necessary for rapid flowering in response to long days. PHYC is in the active Pfr state at the end of the day, but we observe it undergoes dark reversion over the course of the night.
Conclusions: We propose that PHYC acts as a molecular timer and communicates information on night-length to the circadian clock via ELF3.
(© 2023. The Author(s).)
Databáze: MEDLINE
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