Uptake of 2,4-Dichlorophenoxyacetic Acid and Indoleacetic Acid in Tuber Slices of Jerusalem Artichoke and Potato
Abstract
Uptake of 2,4-D and IAA into tuber slices of Jerusalem artichoke (Helianthus tuberosus L.) and potato (Solanum tuberosum L.) was approximately proportional to the external auxin concentration at low (10−8M) to intermediate (10−5∓10−4M) concentrations. A disproportionately rapid increase in uptake occurred at higher concentrations, especially for 2,4-D. Uptake decreased markedly with increasing pH and there was no indication of uptake of the auxin anions. The apparently linear relationships could in some experiments be resolved into precisely multiphasic uptake patterns. It is proposed that uptake of auxins into tuber tissue is by facilitated diffusion of the undissociated acids.
Department
Biological Sciences
Publication Date
4-1-1985
Journal Title
Journal of Plant Physiology
Publisher
Elsevier BV
Digital Object Identifier (DOI)
Document Type
Article
Recommended Citation
Subhash C. Minocha, Per Nissen, Uptake of 2,4-Dichlorophenoxyacetic Acid and Indoleacetic Acid in Tuber Slices of Jerusalem Artichoke and Potato, Journal of Plant Physiology, Volume 120, Issue 4, 1985, Pages 351-362, ISSN 0176-1617, https://doi.org/10.1016/S0176-1617(85)80133-4.
Rights
Copyright © 1985 Gustav Fischer Verlag, Stuttgart. Published by Elsevier GmbH All rights reserved.