Electrogenic mechanism in Characeae plasma membrane
نویسندگان
چکیده
منابع مشابه
Calcium activates an electrogenic proton pump in neurospora plasma membrane.
Calcium ionophoresis into coenocytic cells of Neurospora crassa activates the plasma membrane proton pump as measured by current-voltage analysis. This is direct evidence that intracellular calcium regulates the activity of a key transport enzyme found in higher plants and fungi.
متن کاملIonic mechanism of mechano-perception in Characeae.
Characean internodal cells generate receptor potential in response to mechanical stimuli. We studied responses of internodal cells to a long-lasting stimulus and the results were as follows. (i) The cell generated receptor potential at the moment of both compression and decompression. (ii) The receptor potential (DeltaE (m)) was significantly larger at the moment of decompression than at compre...
متن کاملThe neurospora plasma membrane ATPase is an electrogenic pump.
Biochemicalical evidence is presented which demonstrates that the Neurospora crassa plasma membrane ATPase (ATP phosphohydrolase, EC 3.6.1.3) is an electrogenic pump. The electrical potential across the Neurospora plasma membrane, as monitored by [14C]SCN- uptake by isolated Neurospora plasma membrane vesicles, is markedly increased interior positive under conditions of ATP hydrolysis catalyzed...
متن کاملATP-Regulated Ion Channels in the Plasma Membrane of a Characeae Alga, Nitellopsis obtusa.
Using the patch-clamp technique, we recorded single-channel currents across the excised patch of the plasma membrane of Nitellopsis. Both K(+) and Na(+) can pass this channel, but currents were not carried by Cl(-). Upon the addition of ATP or AMP to the cytoplasmic side, the frequency of channel opening decreased. This is the first report on an ATP-regulated channel in plant cells.
متن کاملTitle: Ionic Mechanism of Mechano-perception in Characeae
Characean internodal cells generate receptor potential in response to mechanical stimuli. We studied responses of internodal cells upon long-lasting stimulus and the results were as follows. (1) The cell generated receptor potential at both moments of compression and decompression. (2) The receptor potential (∆Em) was significantly larger at the moment of decompression than at the compression. ...
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ژورنال
عنوان ژورنال: Seibutsu Butsuri
سال: 1981
ISSN: 0582-4052,1347-4219
DOI: 10.2142/biophys.21.254