This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Web of Science (26) Citing Articles via Google Scholar Google Scholar Articles by Pitman, M. G. Articles by Wellfare, D. Search for Related Content PubMed PubMed Citation Articles by Pitman, M. G. Articles by Wellfare, D. Agricola Articles by Pitman, M. G. Articles by Wellfare, D.

Articles

Effect of Azetidine 2-Carboxylic Acid on Ion Uptake and Ion Release to the Xylem of Excised Barley Roots ¹

^a School of Biological Sciences, University of Sydney, N.S.W., Australia 2006

Azetidine 2-carboxylic acid (AZ) was used as an analog of proline to investigate further the relationship between protein synthesis and ion transport. AZ does not inhibit protein assembly, but the proteins formed are ineffective as enzymes. At relatively low concentrations (50 µM) AZ was a potent inhibitor of release of ions to the xylem of excised roots of barley (Hordeum vulgare L.) and intact plants. Uptake to the root was also inhibited but to a lesser degree. A procedure was introduced for estimating unidirectional fluxes from measurements of net tracer uptake, net transport to the xylem, and net efflux from the roots. It was shown that inhibition of release to the xylem was not caused by reduction in influx at the plasmalemma or to stimulation of influx to the vacuoles. It was suggested that AZ was acting on the process of release from symplast to the xylem. The action of AZ is compared with similar effects on ion transport produced by p-fluorophenylalanine, cycloheximide, and abscisic acid.

This article has been cited by other articles:

				S. Wilkinson, J. E. Corlett, L. Oger, and W. J. Davies Effects of Xylem pH on Transpiration from Wild-Type and flacca Tomato Leaves . A Vital Role for Abscisic Acid in Preventing Excessive Water Loss Even from Well-Watered Plants Plant Physiology, June 1, 1998; 117(2): 703 - 709. [Abstract] [Full Text]