If the animals lead in organizing the circadian rhythms of the brain plays in plants # 8212; synthesized during photosynthesis sugar All living creatures have circadian, circadian, or daily circadian biological rhythms that regulate the body in accordance with the changes of time of day, and the plants do not There is an exception. The driving force here - photosynthesis, is directly dependent on sunlight. Plants listen to fluctuations in the concentration of sucrose synthesized in photosynthesis, changes in levels of which are a signal plant genes control by named circadian rhythms.
Circadian rhythms of plants depend on the metabolism of carbohydrates. (Photo by Shutterstock.)
Alex Webb of Cambridge (UK) and colleagues performed experiments in which the plant Arabidopsis thaliana deprived of carbon dioxide, and as a result, researchers concluded that the circadian rhythm of plants to ask those same sugars that are synthesized during photosynthesis. More precisely - changes in their concentration.
In a paper published in Nature, the researchers write about the gene PRR7, which intensified in the morning, but in this case depended on the concentration of sugars. Mutants of this gene were insensitive to fluctuations of sucrose, and in turn, without access of carbon dioxide, i.e. the suppression of photosynthesis, plants frustrated internal clock started late and for 2-3 hours.
That is, the fluctuation of carbohydrates allowed to adjust metabolism and physiology of the plant before dawn so they could meet the sun ready for photosynthesis.
It turns a simple and effective way to control circadian rhythms, when the plant is compared with the time of day using the products of photosynthesis, which itself is the time of day and depends.
in the wake of the University of Cambridge, Shutterstock, compulenta.computerra.ru
