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Vascular system is the main route of electrical wave transmission elicited by localized wounding in Nasturtium offcinale

Yuan Ming

Plant Physiology Laboratory, Biology College, Beijing Agricultural University. Beijing 100094

Abstract

Electrical wave (EW) transmission in plant is caused by either action potential (AP) or variation potential (VP). Evidence is presented that the vascular system is the main route of burning-elicited transmission in watercress (nasturtionm officinale R. Br.). the transmitted EW could be AP. VP, or Ap-VP complex, or a train of AP pulses. In accordance with the 2/5 phyllotaxy EW transmission took place preferentially from the burned leaf to the leaves with intervals of four leaves along the stem, which were connected directly with the same vascular strands, If vascular strands leading from the stem to the burned leaf were cut off at the junction, EW transmission from the leaf to the stem was blocked. Similar EW could be detected from the constiuent cells of the ground parenchyma cells with the intracellular microelectrode.

Key words: Nasturtium officinale;Action potential;Variation potential;Vascular-system; Wounding

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Citing This Article：

Yuan Ming. Vascular system is the main route of electrical wave transmission elicited by localized wounding in Nasturtium offcinale. Acta Physiol Sin 1995; 47 (4): (in Chinese with English abstract).