PIF-mediated sucrose regulation of the circadian oscillator is light quality and temperature dependent
| Autor: | Rachel M. Green, Ekaterina Shor, Enamul Huq, Raya Potavskaya, Ayelet Kurtz, Inyup Paik |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Sucrose lcsh:QH426-470 Circadian clock sucrose signal Photosynthesis 01 natural sciences Article 03 medical and health sciences chemistry.chemical_compound Arabidopsis Genetics PIFs Circadian rhythm Transcription factor Genetics (clinical) Phytochrome biology temperature biology.organism_classification Cell biology lcsh:Genetics 030104 developmental biology chemistry circadian rhythms Entrainment (chronobiology) 010606 plant biology & botany red/blue ratio |
| Zdroj: | Genes Genes, Vol 9, Iss 12, p 628 (2018) Volume 9 Issue 12 |
| ISSN: | 2073-4425 |
| Popis: | Studies are increasingly showing that metabolic and circadian (~24 h) pathways are strongly interconnected, with the circadian system regulating the metabolic state of the cell, and metabolic products feeding back to entrain the oscillator. In plants, probably the most significant impact of the circadian system on metabolism is in its reciprocal regulation of photosynthesis however, the pathways by which this occurs are still poorly understood. We have previously shown that members of the basic helix-loop-helix (bHLH) transcription factor PHYTOCHROME INTERACTING FACTOR (PIF) family are involved in the photosynthate entrainment of the circadian oscillator. In this paper, using Arabidopsis mutants and overexpression lines, we examine how temperature and light quality affect PIF-mediated sucrose signaling to the oscillator and examine the contributions of individual PIF members. Our results also show that the quality of light is important for PIF signaling, with red and blue lights having the opposite effects, and that temperature affects PIF-mediated sucrose signaling. We propose the light sensitivity of PIF-mediated sucrose entrainment of the oscillator may be important in enabling plants to distinguish between sucrose produced de novo from photosynthesis during the day and the sucrose products of starch degradation at the end of the night. |
| Databáze: | OpenAIRE |
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