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Author |
Shor, E.; Potavskaya, R.; Kurtz, A.; Paik, I.; Huq, E.; Green, R. |
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Title |
PIF-mediated sucrose regulation of the circadian oscillator is light quality and temperature dependent |
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Journal Article |
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Year |
2018 |
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Abbreviated Journal |
Genes (Basel) |
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Volume |
9 |
Issue  |
12 |
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Keywords |
Plants |
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Abstract |
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. |
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Department of Plant and Environmental Sciences, Institute for Life Sciences, Edmond J. Safra Campus, Givat Ram, Hebrew University, Jerusalem 91904, Israel. rgreen@mail.huji.ac.il |
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2073-4425 |
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PMID:30551669; PMCID:PMC6316277 |
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GFZ @ kyba @ |
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2155 |
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Author |
Karling, J.S. |
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Title |
A Preliminary Account of the Influence of Light and Temperature on Growth and Reproduction in Chara fragilis |
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Journal Article |
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Year |
1924 |
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Bulletin of the Torrey Botanical Club |
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Bulletin of the Torrey Botanical Club |
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51 |
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12 |
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469 |
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Plants |
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0040-9618 |
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GFZ @ kyba @ |
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2404 |
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Adams, J. |
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Title |
The Effect on Certain Plants of altering the Daily Period of Light |
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1923 |
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Annals of Botany |
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37 |
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145 |
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75-94 |
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Plants |
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GFZ @ kyba @ |
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2406 |
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Adams, J. |
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Duration of Light and Growth |
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1924 |
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Annals of Botany |
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38 |
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151 |
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509-523 |
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Plants |
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GFZ @ kyba @ |
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2391 |
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Author |
ffrench-Constant, R.; Somers-Yeates, R.; Bennie, J.; Economou, T.; Hodgson, D.; Spalding, A.; McGregor, P. |
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Title |
Light pollution is associated with earlier tree budburst across the United Kingdom |
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Journal Article |
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Year |
2016 |
Publication |
Proceedings of the Royal Society B: Biological Sciences |
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Proc Roy Soc B Biol Sci |
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Volume |
283 |
Issue |
1833 |
Pages |
1-9 |
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Keywords |
Plants; light pollution, phenology, species interactions, tree budburst, temperature, urban heat islands; United Kingdom |
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Abstract |
The ecological impact of night-time lighting is of concern because of its well-demonstrated effects on animal behaviour. However, the potential of light pollution to change plant phenology and its corresponding knock-on effects on associated herbivores are less clear. Here, we test if artificial lighting can advance the timing of budburst in trees. We took a UK-wide 13 year dataset of spatially referenced budburst data from four deciduous tree species and matched it with both satellite imagery of night-time lighting and average spring temperature. We find that budburst occurs up to 7.5 days earlier in brighter areas, with the relationship being more pronounced for later-budding species. Excluding large urban areas from the analysis showed an even more pronounced advance of budburst, confirming that the urban ‘heat-island’ effect is not the sole cause of earlier urban budburst. Similarly, the advance in budburst across all sites is too large to be explained by increases in temperature alone. This dramatic advance of budburst illustrates the need for further experimental investigation into the impact of artificial night-time lighting on plant phenology and subsequent species interactions. As light pollution is a growing global phenomenon, the findings of this study are likely to be applicable to a wide range of species interactions across the world. |
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Centre for Ecology and Conservation, and 2 Environment and Sustainability Institute, University of Exeter, Penryn TR10 9EZ, UK; rf222(at)exeter.ac.uk |
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Royal Society |
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English |
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IDA @ john @ |
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1472 |
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