Open AccessEffect of sodium humate on membrane potential in internodal cells of Nitellopsis obtusa
Author(s) -
Maria Zientara
Publication year - 2014
Publication title -
acta societatis botanicorum poloniae
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 29
eISSN - 2083-9480
pISSN - 0001-6977
DOI - 10.5586/asbp.1983.030
Subject(s) - depolarization , membrane potential , hyperpolarization (physics) , chemistry , sodium , biophysics , membrane , electrophysiology , biochemistry , biology , stereochemistry , nuclear magnetic resonance spectroscopy , organic chemistry , neuroscience
Membrane potential and resistance changes in Nitellopsis obtusa induced by Na-humate as a function of external pH were investigated. The administration of Na-humate at concentrations of 12.5, 25, 50 and 100 mg dm-3 brought about a hyperpolarization of the membrane potential and a drop of d.c. resistance in the pH range between 4.0 and 9.0. Depolarization of the membrane potential induced by low pH was counteracted by Na-humate. The electrophysiological effects of Na-humate are compared with those of IAA