Projects per year
Plants exhibit a wide variety of growth rates that are known to be determined by genetic and environmental factors, and different plants grow optimally at different temperatures, indicating that this is a genetically determined character. Moderate decreases in ambient temperature inhibit vegetative growth, but the mechanism is poorly understood, although a decrease in gibberellin (GA) levels is known to be required. Here we demonstrate that the basic helix-loop-helix transcription factor SPATULA (SPT), previously known to be a regulator of low temperature-responsive germination, mediates the repression of growth by cool daytime temperatures but has little or no growth-regulating role under warmer conditions. We show that only daytime temperatures affect vegetative growth and that SPT couples morning temperature to growth rate. In seedlings, warm temperatures inhibit the accumulation of the SPT protein, and SPT autoregulates its own transcript abundance in conjunction with diurnal effects. Genetic data show that repression of growth by SPT is independent of GA signaling and phytochrome B, as previously shown for PIF4. Our data suggest that SPT integrates time of day and temperature signaling to control vegetative growth rate.
|Number of pages||5|
|Publication status||Published - Aug 2010|
- Arabidopsis Proteins
- Basic Helix-Loop-Helix Transcription Factors
- Gene Expression Regulation, Plant
- RNA, Messenger
- Signal Transduction
FingerprintDive into the research topics of 'SPATULA links daytime temperature and plant growth rate'. Together they form a unique fingerprint.
- 2 Finished
Regulation of biological signalling by temperature (ROBUST)
Halliday, K., Gilmore, S. & Millar, A.
14/04/08 → 13/10/13
Defining the role of PIF3-like bHLH transcription factors in the integration of light and cold signalling in Arabidopsis
Halliday, K. & Josse, E.
1/11/06 → 30/04/10
Researchers identify gene that limits the growth of plants in cool environments.
3 items of Media coverage
- 1 Types of Public engagement and outreach - Media article or participation
Sidaway Lee Curr. Biol. 2010 Press Coverage
Karen Halliday (Interviewee)Sep 2012
Activity: Other activity types › Types of Public engagement and outreach - Media article or participation