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. 1974 Dec;54(6):835-9.
doi: 10.1104/pp.54.6.835.

Effect of pH and Auxin on Chloride Uptake into Avena Coleoptile Cells

B Rubinstein  1
Affiliations

Effect of pH and Auxin on Chloride Uptake into Avena Coleoptile Cells

B Rubinstein. Plant Physiol. 1974 Dec.

Abstract

The effect of pH on (36)Cl(-) movement into coleoptile cells (Avena sativa L. cv. Garry) was investigated and compared with effects of indoleacetic acid. (36)Cl(-) uptake, but not efflux, is stimulated when coleoptile sections are placed in media adjusted to pH levels from 5 to 3 after a preincubation period at pH 6.5. The enhancement is seen within 2 minutes, is not correlated with growth, and is completely erased by respiratory inhibitors. In comparison to the acid-induced stimulation, the stimulatory effect of indoleacetic acid on (36)Cl(-) uptake is also not accompanied by accelerated efflux, and indoleacetic acid does not further stimulate (36)Cl(-) uptake into 1-millimeter sections beyond that seen at pH 3.5 without auxin.

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References

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