Accelerating Effects of Indolederivatives and Metallic Ions on the Extension of Lamina Joints in Excised Rice Leaves

Abstract

This paper reports the actions of indolederivatives, metallic ions, surfactant and chelating. agents on the cell elongation in lamina joints of rice. The angles increased at 5×10-7 or 10-6M of indoleacetic acid, at 10 M of indoleacetonitrile and indolebutyric acid and at 10-4M of indolepropionic acid. But no increment of the angle was obtained by tryptophan at any concentrations used. As regards to actions of metallic ions, a slight effect of about 15 per cent increment of control was presented at 5×10-6M of cupric ion, nevertheless any effect was not obtained at various concentrations of manganous, ferrous and cobaltous ions. The promotive effect of cupric ion was shown at presence of indoleacetic acid but not of 2, 4-dichlorophenoxyacetic acid. However a promotive effect of tween 20 was shown either absence or presence of indoleacetic acid at low concentrations. The effect of ethylenediaminetetraacetate upon the cell elongation was very excellent at absence of potassium maleate buffer but not the presence of the buffer solution. In addition, several problem upon the cell elongation in plants discussed in this paper on the action of the substances using in this experiment.