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. 1981 Aug;68(2):435–438. doi: 10.1104/pp.68.2.435

Inhibition of Anion Transport in Corn Root Protoplasts 1

Willy Lin 1
PMCID: PMC427505  PMID: 16661931

Abstract

The effects of several amino-reactive disulfonic stilbene derivatives and N-(4-azido-2-nitrophenyl)-2-aminoethylsulfonate on Cl−, SO42−, and inorganic phosphate (Pi) uptake in protoplasts isolated from corn root tissue were studied. 4-Acetamido-4′-isothiocyano-2,2′-stilbenedisulfonic acid, 4,4′-diisothiocyano-2,2′-stilbenedisulfonic acid, 4,4′-diamino-2,2′-stilbenedisulfonic acid, and NAP-taurine inhibited Cl− and SO42− but not Pi and K+ uptake in corn root protoplasts; whereas mersalyl inhibited Pi but not Cl− or SO42− uptake. The rate of uptake of all anions decreased with increasing external pH. In addition, these reagents markedly inhibited plasmalemma ATPase activity isolated from corn root tissue. Excised root segments were less sensitive to Cl− and SO42− transport inhibitors.

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Selected References

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