LONDON Zapatillas Hombre Nike Vapormax Pale Grises Baratas , June 6 (Xinhua)-- Plant embryos have cells that function as a brain, a study published Tuesday by scientists at the University of Birmingham has revealed The group of brain cells can assess environmental conditions and dictate when seeds will germinate, the researchers say.


"A plant's decision about when to germinate is one of the most important it will make during its life. Too soon, and the plant may be damaged by harsh winter conditions; too late, and it may be outcompeted by other, more precocious plants," said the Birmingham researchers in a study published in Proceedings of the National Academy of Sciences (PNAS).


The Birmingham scientists have shown that this trade-off between speed and accuracy is controlled by a small group of cells within the plant embryo that operate in similar way to the human brain.


The "decision-making center" in a plant called Arabidopsis, or thale cress, contains two types of cell, one that promotes seed dormancy, and one that promotes germination, the study revealed.


"These two groups of cells communicate with each other by moving hormones, an analogous mechanism to that employed by our own brains when we decide whether or not to move," their study added.


The scientists used mathematical modelling to show that communication between the separated elements controls the plant's sensitivity to its environment.


Following this theory, they used a mutant plant where cells were more chemically linked -- essentially enhancing communication between circuit elements -- to show that germination timing depends on these intra-region signals.


Professor George Bassel from the School of Biosciences at the University of Birmingham, said: "Our work reveals a crucial separation between the components within a plant decision-making centre.


"In the human brain, this separation is thought to introduce a time delay, smoothing out noisy signals from the environment and increasing the accuracy with which we make decisions.


"The separation of these parts in the seed 'brain' also appears to be central to how it functions."


Dr Iain Johnston, a bio-mathematician from the university, involved in the study, added: "The separation of circuit elements allows a wider palette of responses to environmental stimuli.


"It's like the difference between reading one critic's review of a film four times over, or amalgamating four different critics' views before deciding to go to the cinema."


The mathematical theory describing the brain's function predicted that more seeds would germinate when exposed to varying environments, such as fluctuating temperatures, than constant environments, such as constant temperatures. The scientists tested this theory in the lab and found exactly this behavior.


Bassel added: "Our work has important implications for understanding how crops and weeds grow," added Professor Bassel, "There is now potential to apply this knowledge to commercial plants in order to enhance and synchronise germination, increasing crop yields and decreasing herbicide use."


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" Employees install a giant poster to pay tribute to late French Olympic swimmer Camille Muffat (R) near another with the list of names of victims of a fatal helicopter crash at the at the town hall in Nice, March 10, 2015. [PhotoAgencies] Candles burn near a giant photo as people pay tribute to late French Olympic swimmer Camille Muffat in Nice, March 10, 2015. [PhotoAgencies]

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