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| plant_neurobiology [2011-08-11 13:56] – lbilliet | plant_neurobiology [2011-08-11 14:07] – lbilliet | ||
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| - | ===Plant Neurobiology=== | + | ====Plant Neurobiology==== |
| - | ==Definition and origin of the term== | + | ===Definition and origin of the term=== |
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| « Phloem is an electrical conductor of bioelectrochemical impulses over long distances . . . structures of phloem and axon can be pictured as hollow tubes filled with electrolyte solutions » (Volkov, 2000) | « Phloem is an electrical conductor of bioelectrochemical impulses over long distances . . . structures of phloem and axon can be pictured as hollow tubes filled with electrolyte solutions » (Volkov, 2000) | ||
| - | ==Some keywords : | + | ===Some keywords :=== |
| - | Phloem, Xylem, Neuron, Axon | + | [[wp>Phloem]], [[wp>Xylem]], [[wp>Neuron]], [[wp>Axon]] |
| - | ==The signalling systems in plants== | + | ===The signalling systems in plants=== |
| Plants use a lot of chemical signals to regulate their growth, metabolisms and to adapt to external constraints. In the last decades, the study of the key molecules such as auxins, growth regulators, morphogens and other plant hormones has shown a lot of similarities with the animal' | Plants use a lot of chemical signals to regulate their growth, metabolisms and to adapt to external constraints. In the last decades, the study of the key molecules such as auxins, growth regulators, morphogens and other plant hormones has shown a lot of similarities with the animal' | ||
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| There are two types of electrical impulses in the plant : | There are two types of electrical impulses in the plant : | ||
| - | * The action potentials have been shown to be involved in many internal regulation processes (growth synchronization, | + | |
| - | * The slow wave potential (also called variation potential) are induced in case of more severe wounds, and seem to be transmitted via the xylem. | + | |
| The action potentials are largely documented in the scientific literature and the most famous manifestation of it is the rapid reaction of ' | The action potentials are largely documented in the scientific literature and the most famous manifestation of it is the rapid reaction of ' | ||
| - | ==Origin of the similarities between the signalling systems in plants and animals== | + | ===Origin of the similarities between the signalling systems in plants and animals=== |
| Between two living organisms, a similarity can be explained by a process of convergent evolution (in that case we speak about an homoplasy) or by the existence of a common ancestor that already presented that certain feature. | Between two living organisms, a similarity can be explained by a process of convergent evolution (in that case we speak about an homoplasy) or by the existence of a common ancestor that already presented that certain feature. | ||
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| “plants may be more sophisticated and share more in common with animals in their non-cognitive behaviours than previously thought” (Gersani et al., 2001) | “plants may be more sophisticated and share more in common with animals in their non-cognitive behaviours than previously thought” (Gersani et al., 2001) | ||
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| + | ===References=== | ||
| The International Laboratory of Plant Neurobiology (LINV), in Florence, is the research group of F. Baluska and S. Mancuso, two prominent figures in plant neurobiology. A serie of publications are freely available on the website of LINV: | The International Laboratory of Plant Neurobiology (LINV), in Florence, is the research group of F. Baluska and S. Mancuso, two prominent figures in plant neurobiology. A serie of publications are freely available on the website of LINV: | ||
| [[http:// | [[http:// | ||
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| - | ===References=== | ||
| * Peter W. Barlow (2008) // | * Peter W. Barlow (2008) // | ||
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