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MEMBRANE POTENTIAL COMPONENTS OF THE MARINE FUNGUS DENDRYPHIELLA SALINA (SUTH.) PUGH ET NICOT. POSSIBLE INVOLVEMENT OF CALMODULIN IN ELECTROPHYSIOLOGY AND GROWTH
Author(s) -
BROWNLEE C.
Publication year - 1984
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1984.tb04104.x
Subject(s) - trifluoperazine , calmodulin , membrane potential , biophysics , electrophysiology , chemistry , membrane , biochemistry , biology , enzyme , neuroscience
S ummaryDendryphiella salina has membrane potentials of around −250 mV. Inhibition of respiration produced large, rapid and reversible depolarizations, which suggests the presence of an electrogenic pump. The Ca 2+ ‐calmodulin inhibitor trifluoperazine in the micromolar range reversibly depolarized the membrane potential and irreversibly (or only slowly reversibly) decreased membrane conductance. Trifluoperazine inhibited hyphal extension but did not alter branching, although branching was stimulated at the hyphal tips following removal of the inhibitor.