IONIC COMPOSITION AND ELECTRIC RESPONSE OF <italic>LAMPROTHAMNIUM SUCCINCTUM</italic><xref ref-type="fn" rid="fn1"><sup>1</sup></xref>
1965; Oxford University Press; Linguagem: Inglês
10.1093/oxfordjournals.pcp.a079122
ISSN1471-9053
AutoresUichiro Kishimoto, Masashi Tazawa,
Tópico(s)Analytical chemistry methods development
ResumoThe concentrations of K+, Na+ and Cl− in the cytoplasm of Lamprothamnium succinctum, a brackish water Characeae, are about 137, 47 and 86 mM respectively. The concentration of K+ in the cytoplasm is of the same order as that in the cell sap, while the concentrations of Na+ and Cl− are much lower than those in the cell sap (i.e., 140 mM Na+, 370 mM Cl−). In the brackish water, in which the plant grows, the internodes is never excitable electrically. However, it acquires excitability when it is kept in a mannitol-pond water. The action potential thus elicited is accompanied by a temporary cessation or slow down of the cytoplasmic streaming.
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