Proton efflux from corn roots induced by tripropyltin.

doi:10.1104/PP.68.4.981

Paper

Proton efflux from corn roots induced by tripropyltin.

Published Oct 1, 1981 · C. Chastain, J. B. Hanson

Plant physiology

Q1 SJR score

10

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0

Influential Citations

Full textSemantic Scholar

Abstract

Tripropyltin restores medium acidification by washed corn root tissue in which electrogenic H(+) efflux has been blocked by ATPase inhibitors or injury. However, the restored H(+) efflux is not electrogenic and will not drive K(+) influx, and, by itself, tripropyltin is inhibitory to K(+) influx. Tripropyltin elicits a 5-fold increase in endogenous chloride efflux, and Cl(-)/OH(-) exchange can, thus, account for the observed acidification of the medium. This explanation cannot be applied equally to the acidification produced by the K(+)/H(+) exchanging ionophore nigericin.

Study Snapshot

Tripropyltin restores medium acidification in corn roots by increasing endogenous chloride efflux, which accounts for the observed acidification, but does not drive K(+) influx.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

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Paper

Proton efflux from corn roots induced by tripropyltin.

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References

Sensitivity of the proton and ion transport mechanisms of corn roots to injury

Injuries to corn roots cause a partial collapse of the electrogenic H+/K+-ATPase, which can be restored by washing with dilute, aerated CaCl2 solutions.

Kinetics of Hormone-induced H Excretion.

Hormone-induced H(+) excretion in Avena coleoptile sections varies in time and rate, with fusicoccin-induced excretion beginning within the first minute and auxin-induced excretion taking 20 to 30 minutes to reach optimal wall loosening pH.

Citations

The role of calcium in the cold shock responses.

Cold shock in corn root tissue leads to a rapid influx of calcium into the cytosol, affecting potassium efflux and membrane phospholipid hydrolysis.

Controls on calcium ion fluxes in injured or shocked corn root cells: Importance of proton pumping and cell membrane potential

Corn roots restrict calcium ion influx through hyper-polarization of the plasmalemma, and cold-shocked roots partially extrude calcium ions during recovery by a process stimulated by fusicoccin and subject to uncoupling.

Short term 22Na+ and 42K+ uptake in intact, mid‐vegetative plants

Spergularia marina is a promising experimental system with rapid nutrient acquisition and high salt tolerance, making it a promising experimental system for ion transport studies.

Reactions of corn root tissue to calcium.

0.1 millimolar calcium in corn root tissue inhibits initial rapid K(+) influx but increases sustained rate of K(+) and Cl(-) uptake, with Mg(2+) substituting for Ca(2+) in initial inhibition.

Inhibition of proton pumping in corn roots is associated with increased phosphorylation of membrane proteins

Injury or cold shock in corn roots leads to increased phosphorylation of membrane proteins, potentially blocking hydrogen efflux pumping and activating protein kinase.

Short term ^̂Na"*" and ''̂ K^ uptake in intact, mid-vegetative Spergulaiia marina plants

Spergularia marina plants show rapid nutrient acquisition and high salt tolerance, making them a promising experimental system for studying ion transport in coastal halophytes.

Organotin compounds: Toxicology and biomedicinal applications

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Organotin compounds: Toxicology and biomedicinal applications

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