title: Phytochrome-mediated changes in the membrane potential of subepidermal cells of Lemna paucicostata 6746.
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.
authors.affiliation: Botanisches Institut der Universität für Bodenkultur, Gregor Mendel-Str. 33, A-1180, Vienna, Austria.
authors.forename: H
authors.initials: H
authors.lastname: Löppert
authors.forename: W
authors.initials: W
authors.lastname: Kronberger
authors.forename: R
authors.initials: R
authors.lastname: Kandeler