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Proceedings of the National Academy of Sciences of the United States of America
06 28, 2022;119 (26): e2122582119.

The evening complex integrates photoperiod signals to control flowering in rice.

Luis Andrade, Yunlong Lu, André Cordeiro, João M F Costa, Philip A Wigge, Nelson J M Saibo, Katja E Jaeger
Author Information
  1. Luis Andrade: Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, 2780-157 Oeiras, Portugal. ORCID
  2. Yunlong Lu: Leibniz-Institut für Gemüse- und Zierpflanzenbau, 14979 Grossbeeren, Germany.
  3. André Cordeiro: Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, 2780-157 Oeiras, Portugal.
  4. João M F Costa: Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, 2780-157 Oeiras, Portugal. ORCID
  5. Philip A Wigge: Leibniz-Institut für Gemüse- und Zierpflanzenbau, 14979 Grossbeeren, Germany. ORCID
  6. Nelson J M Saibo: Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, 2780-157 Oeiras, Portugal. ORCID
  7. Katja E Jaeger: Leibniz-Institut für Gemüse- und Zierpflanzenbau, 14979 Grossbeeren, Germany. ORCID
PMID: 35733265 DOI: 10.1073/pnas.2122582119

Abstract

Plants use photoperiodism to activate flowering in response to a particular daylength. In rice, flowering is accelerated in short-day conditions, and even a brief exposure to light during the dark period (night-break) is sufficient to delay flowering. Although many of the genes involved in controlling flowering in rice have been uncovered, how the long- and short-day flowering pathways are integrated, and the mechanism of photoperiod perception is not understood. While many of the signaling components controlling photoperiod-activated flowering are conserved between and rice, flowering in these two systems is activated by opposite photoperiods. Here we establish that photoperiodism in rice is controlled by the evening complex (EC). We show that mutants in the EC genes () and () paralogs abolish rice flowering. We also show that the EC directly binds and suppresses the expression of flowering repressors, including and . We further demonstrate that light acts via phyB to cause a rapid and sustained posttranslational modification of ELF3-1. Our results suggest a mechanism by which the EC is able to control both long- and short-day flowering pathways.

Keywords

ELF3 Evening Complex LUX flowering rice

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MeSH Term

Arabidopsis
Flowers
Gene Expression Regulation, Plant
Light
Oryza
Photoperiod
Plant Proteins

Chemicals

Plant Proteins
Journal Article Research Support, Non-U.S. Gov't

Links to CNCB-NGDC Resources

GEN: GEND000515 (The Evening Complex integrates photoperiod signals to control flowering in rice)

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