Projects per year
Abstract
The ability to withstand environmental temperature variation is essential for plant survival. Former studies in Arabidopsis revealed that light signalling pathways had a potentially unique role in shielding plant growth and development from seasonal and daily fluctuations in temperature. In this paper we describe the molecular circuitry through which the light receptors cry1 and phyB buffer the impact of warm ambient temperatures. We show that the light signalling component HFR1 acts to minimise the potentially devastating effects of elevated temperature on plant physiology. Light is known to stabilise levels of HFR1 protein by suppressing proteasome-mediated destruction of HFR1. We demonstrate that light-dependent accumulation and activity of HFR1 are highly temperature dependent. The increased potency of HFR1 at warmer temperatures provides an important restraint on PIF4 that drives elongation growth. We show that warm ambient temperatures promote the accumulation of phosphorylated PIF4. However, repression of PIF4 activity by phyB and cry1 (via HFR1) is critical for controlling growth and maintaining physiology as temperatures rise. Loss of this light-mediated restraint has severe consequences for adult plants which have greatly reduced biomass.
Original language | English |
---|---|
Pages (from-to) | 441-52 |
Number of pages | 12 |
Journal | The Plant Journal |
Volume | 65 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2011 |
Keywords / Materials (for Non-textual outputs)
- light signalling
- phytochrome
- cryptochrome
- bHLH
- HFR1
- Arabidopsis
Fingerprint
Dive into the research topics of 'Light receptor action is critical for maintaining plant biomass at warm ambient temperatures'. Together they form a unique fingerprint.Projects
- 1 Finished
-
Regulation of biological signalling by temperature (ROBUST)
Halliday, K., Gilmore, S. & Millar, A.
14/04/08 → 13/10/13
Project: Research
Research output
- 1 Article
-
Plant development: light exposure directs meristem fate
Griffiths, J. & Halliday, K., 11 Oct 2011, In: Current biology : CB. 21, 19, p. R817-819 3 p.Research output: Contribution to journal › Article › peer-review
Activities
-
International Plant Molecular Biology Congress
Karen Halliday (Invited speaker)
21 Oct 2012 → 26 Oct 2012Activity: Participating in or organising an event types › Participation in conference
-
Press coverage of article
Karen Halliday (Interviewee)
Oct 2011Activity: Other activity types › Types of Public engagement and outreach - Media article or participation
-
Interplay of Light, Photoperiodism and Circadian Clock Function
Karen Halliday (Keynote/plenary speaker)
May 2011Activity: Participating in or organising an event types › Participation in conference