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RESEARCHERS FIND LINK BETWEEN PLANT METABOLISM AND BIOLOGICAL CLOCK

Published: Wednesday, March 30, 2011
Last Updated: Wednesday, March 30, 2011
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Scientists provide a proof that plant metabolism can regulate the circadian mechanism.

Circadian clocks are biological clocks that anticipate the day-night cycle, timing various metabolic processes in living organisms. University of Cambridge scientist, Neil Dalchau, and colleagues report sensitivity of the Arabidopsis thaliana circadian oscillator to sucrose, which could be a proof that plant metabolism can regulate the circadian mechanism. They observed that the circadian system of Arabidopsis is particularly sensitive to sucrose in the dark. This indicates that there is feedback between the molecular components of the circadian oscillator and plant metabolism wherein the biological clock is both regulating and being regulated by this metabolism.

Circadian clock components' sensitivity to sucrose was also analyzed and it was found that the oscillator gene GIGANTEA (GI) is associated with sucrose sensing. Thus, GI is a component of the sucrose-signaling network and allows metabolic input in circadian timing in Arabidopsis.

Via crop Biotech update (isaaa.org) 


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