Ionic Relations of Nitella translucens
نویسندگان
چکیده
منابع مشابه
Ionic Relations of Nitella translucens
The ionic state of single internodal cells of a fresh water characean, Nitella translucens, has been studied. In mature cells the vacuolar concentrations were 78 mM K, 60 mM Na, and 151 mM Cl, compared with concentrations of 0.1 mM K, 1.0 mM Na, and 1.3 mM Cl in the bathing medium. The results suggest an active influx of potassium and an active efflux of sodium at the plasmalemma, and an active...
متن کاملIonic Relations of NiteUa translucens
The ionic state of single internodal cells of a fresh water characean, Nitella translucens, has been studied. In mature cells the vacuolar concentrations were 78 m~ K, 60 mM Na, and 151 mM CI, compared with concentrations of 0.1 mM K , 1.0 him Na, and 1.3 mM CI in the bathing medium. The results suggest an active influx of potassium and an active efflux of sodium at the plasmalemma, and an acti...
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Electrical resistance measurements, made with intracellular microelectrodes on a system consisting of two giant internodal cells of Nitella translucent joined by a node, show that the specific resistance of the node is 50 times smaller than the specific resistance of the internodal cell plasmalemma. The node is a complex structure of small cells which separate the internodal cells by a single l...
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A more complete study of ionic concentrations and fluxes in the giant internodal cells of Nitella translucens has been made. The vacuolar concentrations were 76 mM K and 170 mM Cl. The content of the chloroplast layer was 135 mmicromoles K/cm(2) and 215 mmicromoles Cl/cm(2); in a layer 9 micro thick these correspond to concentrations of 150 mM K and 240 mM Cl. Such a high level of chloride requ...
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Mono-divalent ion exchange in isolated cell walls of Nitella flexilis (L.) Ag. induces a marked loss of wall polymers and a decrease in the wall cationic exchange capacity. These data correlate with the replacement in the walls of adsorbed Mn(2+) by Na(+) ions. Boiling wall samples in methanol for 1 h or keeping the ionic solutions chilled to 4 degrees C does not inhibit the cell wall polymer l...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1962
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.45.5.861