Action of protein synthesis inhibitors in blocking electrogenic H/sup +/ efflux from corn roots

Journal Article · Wed Apr 01 04:00:00 EST 1981 · Plant Physiol.; (United States)

OSTI ID:6409605

Chastain, C J; LaFayette, P R; Hanson, J B

The block in the electrogenic H/sup +/ efflux produced by protein synthesis inhibitors in corn root tissue can be released or by-passed by addition of fusicoccin or nigericin. The inhibition also lowers cell potential, and the release repolarizes. Associated with the inhibition of H/sup +/ efflux is inhibition of K/sup +/ influx and the growth of the root tip; fusicoccin partially relieves these inhibitions, but nigericin does not. The inhibition of H/sup +/ efflux which arises from blocking the proton channel of the ATPase by oligomycin or N,N'-dicyclohexylcarbodiimide can also be partially relieved by fusicoccin, but not by nigericin; the inhibition produced by diethylstilbestrol is not relieved by fusicoccin. The results are discussed in terms of the presumed mode of action of fusicoccin on the plasmalemma ATPase.

• Research Organization: Univ. of Illinois, Urbana
• DOE Contract Number: AC02-76EV00790
• OSTI ID: 6409605
• Journal Information: Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 67:4; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

551000* -- Physiological Systems
59 BASIC BIOLOGICAL SCIENCES
ACID ANHYDRASES
ALKALI METAL COMPOUNDS
ATP-ASE
BIOSYNTHESIS
CATIONS
CEREALS
CHARGED PARTICLES
ENZYMES
GRAMINEAE
GRASS
HYDROGEN IONS
HYDROLASES
INHIBITION
IONS
MAIZE
MEMBRANE TRANSPORT
ORGANIC COMPOUNDS
PHOSPHOHYDROLASES
PLANTS
POTASSIUM COMPOUNDS
PROTEINS
ROOTS
SYNTHESIS