Action of Protein Synthesis Inhibitors in Blocking Electrogenic H+ Efflux from Corn Roots 12

AUTOR(ES)

Chastain, Chris J.

RESUMO

The block in the electrogenic H+ 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+ efflux is inhibition of K+ influx and the growth of the root tip; fusicoccin partially relieves these inhibitions, but nigericin does not. The inhibition of H+ 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.

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