Hydraulic and electrical transmission of wound-induced signals in Vitis vinifera

摘要: The nature and characteristics of the electrical response to wounding in woody plant Vitis vinifera L. were examined. Following burning a small area leaf, bioelectrical events spread throughout shoot. heat wound triggered stem deformations (widening–contraction), which preceded changes biopotentials that are interpreted as reflecting wound-induced hydraulic signals. It also caused marked decrease extracellular resistance tissues, starting about 15 s after stimulation, while intracellular did not show any modification. Under an N2 atmosphere (hypoxic conditions), action potentials disappeared amplitude variation decreased approximately 50%. At saturating humidity completely eliminated, evident. Taken together, results demonstrate differ both their mechanism propagation electrogenic nature. Action ‘genuine’ self-propagating signals travelling at velocity 10 cm s-1, with metabolic involving active components (electrogenic pumps). Variation ‘local’ passage wave. Results support hypothesis ion channels pumps involved potential depolarisation.