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plant_neurobiology [2011-09-02 10:36] – lbillietplant_neurobiology [2013-04-05 12:12] (current) – [Plant Neurobiology] nik
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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 ===
  
-[[w>Phloem]], [[w>Xylem]], [[w>Neuron]], [[w>Axon]], [[w>Action Potential]]+from wikipedia 
 +  * [[w>Phloem]] 
 +  * [[w>Xylem]] 
 +  * [[w>Neuron]] 
 +  * [[w>Axon]] 
 +  * [[w>Action Potential]] 
 + 
 +other pages on the libarynth >> [[plant perception]]
  
 ===Electrical signals in plants=== ===Electrical signals in plants===
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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, modulation of auxin metabolism, sensing of hydraulic signal, some 'moving' reactions, etc.), and are transmitted via the phloem. The term 'action potential' actually comes from the classical neurobiology.+  * The //action potentials// have been shown to be involved in many internal regulation processes (growth synchronization, modulation of auxin metabolism, sensing of hydraulic signal, some 'moving' reactions, etc.), and are transmitted via the phloem. The term 'action potential' actually comes from the classical neurobiology.
  
-  * The slow wave potentials (or variation potentials) are induced in case of more severe wounds, and seem to be transmitted via the xylem.+  * The //slow wave potentials// (or variation potentials) are induced in case of more severe wounds, and seem to be transmitted via the xylem.
  
 ==Action potentials in plants== ==Action potentials in plants==
  
-The action potentials are largely documented in the scientific literature and the most famous manifestation of it is the rapid reaction of 'sensitive' plants such as Mimosa pudica or the insect trap of Dionaea muscipula. Those signals actually consist in a wave of depolarization of the plasma membrane around the sieve tubes (Volkov, 2004).+The action potentials are largely documented in the scientific literature and the most famous manifestation of it is the rapid reaction of 'sensitive' plants such as //Mimosa pudica// or the insect trap of //Dionaea muscipula//. Those signals actually consist in a wave of depolarization of the plasma membrane around the sieve tubes (Volkov, 2004).
 Just as in animal's neurons, this wave of depolarization is followed by a short period of non-excitability, called the refractory period. This mechanism prevent the action potential travelling back the way it just came. Just as in animal's neurons, this wave of depolarization is followed by a short period of non-excitability, called the refractory period. This mechanism prevent the action potential travelling back the way it just came.
 The sensory systems of plants also allow the summation of subthreshold stimuli, that finally induce an internal signal when the threshold is reached. The sensory systems of plants also allow the summation of subthreshold stimuli, that finally induce an internal signal when the threshold is reached.
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   * Henriques I. (2011) Jurema Action Plant, http://ivanhenriques.wordpress.com   * Henriques I. (2011) Jurema Action Plant, http://ivanhenriques.wordpress.com
  
-note: 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://www.linv.org/linv_papers.php]]+note: 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://www.linv.org/linv_papers.php
  
 ===Other refereces=== ===Other refereces===
  • plant_neurobiology.txt
  • Last modified: 2013-04-05 12:12
  • by nik