Rapid hormone-induced hyperpolarization of the oat coleoptile transmembrane potential

Journal Article · Mon Feb 28 23:00:00 EST 1977 · Plant Physiol.; (United States)

DOI:https://doi.org/10.1104/pp.59.3.395· OSTI ID:7306931

Cleland, R E; Prins, H B.A.; Harper, J R; Higinbotham, N

The effects of the plant growth substances indoleacetic acid (IAA) and fusicoccin on the transmembrane potential of Avena coleoptile cells (at 27 to 29/sup 0/C) were studied. Fusicoccin caused hyperpolarization of the membrane potential which started after a lag of less than 20 seconds, and which on average reached -49 mv at an external K/sup +/ concentration of 1 mM and -75 mv at 0.1 mM K/sup +/. IAA caused a hyperpolarization of -25 mv starting after a lag of 7 to 8 minutes. These results suggest that fusicoccin and IAA both activate electrogenic H/sup +/ extrusion.

• Research Organization: Washington State Univ., Pullman
• OSTI ID: 7306931
• Journal Information: Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 59:3; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

550200* -- Biochemistry
550300 -- Cytology
59 BASIC BIOLOGICAL SCIENCES
BIOCHEMISTRY
BIOMASS
CATIONS
CEREALS
CHARGED PARTICLES
CHEMISTRY
CYTOCHEMISTRY
ENERGY SOURCES
GRAMINEAE
GRASS
HORMONES
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
IONS
MEMBRANE TRANSPORT
MEMBRANES
OATS
PLANT GROWTH REGULATORS
PLANTS
RENEWABLE ENERGY SOURCES