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- Title
Action Potentials in Lupinus angustifolius L. Shoots.
- Authors
ZAWADZKI, TADEUSZ; TRBEACZ, KAZIMIERZ
- Abstract
The action potential (AP) in stem was produced by electrical stimulation. The block was accomplished by tightening a nylon thread looped around the stem. The character of tissue damage in the blocked area was observed in microscopic sections. It was found that the AP propagation in the block and beyond depended on the degree of compression, i. e. on the extent of damage to stem tissues within the block. With a slight tightening only AP ‘retardation’ occurs within the block. With a strong tightening, in which tissue damage reaches the external layers of phloemcells, there is a total extinction or arrest of the AP in the block. Beyond the block there occur extrinsic potentials (EPs) which have the character of electrotonic potentials. Under certain conditions the excitation may pass through such a block. Then the AP propagation beyond the block reveals a complex character. It may be assumed that AP propagation in the stem occurs on the principle of electrotonic currents with the participation of many (probably all) cells of the primary cortex.
- Publication
Journal of Experimental Botany, 1982, Vol 33, Issue 1, p100
- ISSN
0022-0957
- Publication type
Article