منابع مشابه
Vacuolar ion channels in the liverwort Conocephalum conicum.
As a liverwort Conocephalum conicum belongs to the oldest terrestrial plants1 and is phylogenetically located between green algae and higher plants. Recent patch-clamp recordings on Conocephalum vacuoles2,3 demonstrate ion channels very similar to higher plants and clearly different from vacuolar ion channels described in green algae. Here we summarize the features of a vacuolar cation channel ...
متن کاملCharacteristics of anion channels in the tonoplast of the liverwort Conocephalum conicum.
Isolated vacuoles of the liverwort Conocephalum conicum thallus cells were investigated using the patch-clamp technique. At high cytosolic Ca(2+) activities, slowly activating currents were evoked by positive potentials. The currents were conducted by the SV (slow-vacuolar) channel. When isolation of vacuoles was carried out at high Mg(2+) and low Ca(2+) concentration and the same proportion of...
متن کاملThe influence of glutamic and aminoacetic acids on the excitability of the liverwort Conocephalum conicum.
Intracellular microelectrode measurements revealed that a resting potential (RP), an action potential (AP) and a calcium component of AP (named voltage transient, VT) can be influenced by glutamic acid (Glu) and aminoacetic acid (glycine, Gly) in the liverwort Conocephalum conicum. In the continuous presence of 5mM Glu or 5mM Gly, the RP hyperpolarized constantly and the plants became desensiti...
متن کاملElectrophysiological approach to examine a putative cold- and menthol- sensitive channel in the liverwort Conocephalum conicum.
The mechanism of cold perception by plants is still poorly understood. It was found that temperature drop evokes changes in the activity of ion pumps and channels, which leads to plasma membrane depolarization. The nature of the primary step of its action (alteration in membrane composition, transient influx of Ca2+ etc.,) has not been elicited yet. Our electrophysiological experiments conducte...
متن کاملCalcium-Dependent Voltage Transients Evoked by Illumination in the Liverwort Conocephalum conicum
The liverwort Conocephalum conicum with anion channels blocked by anthracene-9-carboxylic acid (A-9-C) and potassium channels blocked by tetraethylammonium (TEA) generates dose-dependent responses to illumination further called voltage transients (VTs). Unlike the action potentials in untreated Conocephalum thalli, VTs do not propagate and cannot be evoked by electrical stimuli. Except A-9-C, t...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1921
ISSN: 0006-8071
DOI: 10.1086/332921