JA modulates phytochrome a signaling via repressing FHY3 activity by JAZ proteins
- 11 February 2020
- journal article
- research article
- Published by Taylor & Francis Ltd in Plant Signaling & Behavior
- Vol. 15 (3), 1726636
- https://doi.org/10.1080/15592324.2020.1726636
Abstract
Phytochrome A (phyA) is the primary photoreceptor mediating various plant responses to far-red (FR) light. The defense-related phytohorme jasmonic acid (JA) has been shown recently to play a role in regulating phyA-mediated FR signaling. However, the detailed molecular mechanisms governing phyA- and JA-mediated signaling cross talks are still not well understood. Here, we uncover a molecular cascade in which JAZ1 inactivates phyA signaling through repressing the transcriptional activity of FHY3 on FHY1 and FHL. Furthermore, we demonstrate that the expression levels of FHY1 and FHL, and some FR response genes are reduced in the coi1 mutant. These findings unveil a previously unrecognized mechanism whereby JA modulates phyA signaling through repressing the activities of FHY3 by JAZs.Keywords
This publication has 10 references indexed in Scilit:
- Arabidopsis FHY3 and FAR1 Regulate the Balance between Growth and Defense Responses under Shade ConditionsTHE PLANT CELL ONLINE, 2019
- Arabidopsis Transcription Factor ELONGATED HYPOCOTYL5 Plays a Role in the Feedback Regulation of Phytochrome A SignalingTHE PLANT CELL ONLINE, 2010
- Plant hormone signaling lightens up: integrators of light and hormonesCurrent Opinion in Plant Biology, 2010
- A Critical Role for the TIFY Motif in Repression of Jasmonate Signaling by a Stabilized Splice Variant of the JASMONATE ZIM-Domain Protein JAZ10 inArabidopsisTHE PLANT CELL ONLINE, 2009
- Transposase-Derived Transcription Factors Regulate Light Signaling in ArabidopsisScience, 2007
- JAZ repressor proteins are targets of the SCFCOI1 complex during jasmonate signallingNature, 2007
- Arabidopsis fhl / fhy1 double mutant reveals a distinct cytoplasmic action of phytochrome AProceedings of the National Academy of Sciences of the United States of America, 2007
- FHY1 and FHL Act Together to Mediate Nuclear Accumulation of the Phytochrome A PhotoreceptorPlant and Cell Physiology, 2006
- Nuclear Accumulation of the Phytochrome A Photoreceptor Requires FHY1Current Biology, 2005
- Phytochromes and photomorphogenesis in ArabidopsisPhilosophical Transactions B, 1998