Electrical Stimulation on the Growth of a Root of the Higher Plant

Shu EZAKI; Kiyoshi TOKO; Kaoru YAMAFUJI

Electrical Stimulation on the Growth of a Root of the Higher Plant

Shu EZAKI, Kiyoshi TOKO, Kaoru YAMAFUJI

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The growth of a primary root was studied for adzuki beans incubated under an external electric field. An electric current was applied to the solution around the root, which was laid horizontally. The electric potential and pH patterns were measured along the root. The change of the growth speed was observed when the electric field, corresponding to a current of 1-10 µA/cm², was applied for a period of 15 to 60 min. The application of the electric field in the direction from the base to the tip of a root activated the growth of the root, whereas the growth was inhibited by applying the electric field of the reverse polarity. The changes of the growth rates were both about 20% for the currents of 10 µA/cm². The root was generating an electric current pattern in the aqueous solution around its surface with the maximum current density of the order of 1 µA/cm². In the activation of the growth, the amplitude of the electric potential pattern and the acidification around the root were found to be increased. The opposite tendency was obtained in the growth inhibition. The degree of acidification corresponds to the change of the growth rate by a well-known acid growth mechanism.

Publication: IEICE TRANSACTIONS on transactions Vol.E73-E No.6 pp.922-927

Publication Date: 1990/06/25

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Type of Manuscript: PAPER

Category: Measurement and Instrumentation

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Shu EZAKI
Kiyoshi TOKO
Kaoru YAMAFUJI

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Shu EZAKI, Kiyoshi TOKO, Kaoru YAMAFUJI, "Electrical Stimulation on the Growth of a Root of the Higher Plant" in IEICE TRANSACTIONS on transactions, vol. E73-E, no. 6, pp. 922-927, June 1990, doi: .
Abstract: The growth of a primary root was studied for adzuki beans incubated under an external electric field. An electric current was applied to the solution around the root, which was laid horizontally. The electric potential and pH patterns were measured along the root. The change of the growth speed was observed when the electric field, corresponding to a current of 1-10 µA/cm², was applied for a period of 15 to 60 min. The application of the electric field in the direction from the base to the tip of a root activated the growth of the root, whereas the growth was inhibited by applying the electric field of the reverse polarity. The changes of the growth rates were both about 20% for the currents of 10 µA/cm². The root was generating an electric current pattern in the aqueous solution around its surface with the maximum current density of the order of 1 µA/cm². In the activation of the growth, the amplitude of the electric potential pattern and the acidification around the root were found to be increased. The opposite tendency was obtained in the growth inhibition. The degree of acidification corresponds to the change of the growth rate by a well-known acid growth mechanism.
URL: https://globals.ieice.org/en_transactions/transactions/10.1587/e73-e_6_922/_p

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@ARTICLE{e73-e_6_922,
author={Shu EZAKI, Kiyoshi TOKO, Kaoru YAMAFUJI, },
journal={IEICE TRANSACTIONS on transactions},
title={Electrical Stimulation on the Growth of a Root of the Higher Plant},
year={1990},
volume={E73-E},
number={6},
pages={922-927},
abstract={The growth of a primary root was studied for adzuki beans incubated under an external electric field. An electric current was applied to the solution around the root, which was laid horizontally. The electric potential and pH patterns were measured along the root. The change of the growth speed was observed when the electric field, corresponding to a current of 1-10 µA/cm², was applied for a period of 15 to 60 min. The application of the electric field in the direction from the base to the tip of a root activated the growth of the root, whereas the growth was inhibited by applying the electric field of the reverse polarity. The changes of the growth rates were both about 20% for the currents of 10 µA/cm². The root was generating an electric current pattern in the aqueous solution around its surface with the maximum current density of the order of 1 µA/cm². In the activation of the growth, the amplitude of the electric potential pattern and the acidification around the root were found to be increased. The opposite tendency was obtained in the growth inhibition. The degree of acidification corresponds to the change of the growth rate by a well-known acid growth mechanism.},
keywords={},
doi={},
ISSN={},
month={June},}

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TY - JOUR
TI - Electrical Stimulation on the Growth of a Root of the Higher Plant
T2 - IEICE TRANSACTIONS on transactions
SP - 922
EP - 927
AU - Shu EZAKI
AU - Kiyoshi TOKO
AU - Kaoru YAMAFUJI
PY - 1990
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E73-E
IS - 6
JA - IEICE TRANSACTIONS on transactions
Y1 - June 1990
AB - The growth of a primary root was studied for adzuki beans incubated under an external electric field. An electric current was applied to the solution around the root, which was laid horizontally. The electric potential and pH patterns were measured along the root. The change of the growth speed was observed when the electric field, corresponding to a current of 1-10 µA/cm², was applied for a period of 15 to 60 min. The application of the electric field in the direction from the base to the tip of a root activated the growth of the root, whereas the growth was inhibited by applying the electric field of the reverse polarity. The changes of the growth rates were both about 20% for the currents of 10 µA/cm². The root was generating an electric current pattern in the aqueous solution around its surface with the maximum current density of the order of 1 µA/cm². In the activation of the growth, the amplitude of the electric potential pattern and the acidification around the root were found to be increased. The opposite tendency was obtained in the growth inhibition. The degree of acidification corresponds to the change of the growth rate by a well-known acid growth mechanism.
ER -