Related Experiment Video
Updated: May 4, 2026

Using Changes in Leaf Transmission to Investigate Chloroplast Movement in Arabidopsis thaliana
Published on: July 14, 2021
Phytochrome-mediated changes in the membrane potential of subepidermal cells of Lemna paucicostata 6746
H Löppert1, W Kronberger, R Kandeler
1Botanisches Institut der Universität für Bodenkultur, Gregor Mendel-Str. 33, A-1180, Vienna, Austria.
Abstract:
Light-stimulated transmembrane potential changes have been measured continuously after implantation of microelectrodes into subepidermal cells of the short-day plant Lemna paucicostata 6746. Irradiation for 5 min with white or red light caused a transient hyperpolarization. These potential changes could be suppressed with 10(-6) M DCMU. Irradiation of DCMU-inhibited plants with far-red light for 5 min hyperpolarized the membrane potential, which thereafter was not changed by further far-red application. Consecutive red light irradiation for 5 min depolarized the membrane potential. The red/far-red reversibility of the potential changes (which could be repeated several times with a single plant) suggests the participation of phytochrome.
More Related Videos
Related Concept Videos
Photoreceptors and Plant Responses to Light
Cell Signaling in Plants
Biological Clocks and Seasonal Responses
Channel Rhodopsins
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
Regulation of Transpiration by Stomata

