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- Publisher
- Oxford University Press
- Copyright
- Copyright © 2021 American Society of Plant Biologists
- ISSN
- 0032-0889
- eISSN
- 1532-2548
- DOI
- 10.1104/pp.54.4.499
- Publisher site
- See Article on Publisher Site
Abstract
Abstract Auxin promotes the liberation of a xlyoglucan polymer from the cell walls of elongating pea (Pisum sativum) stem segments. The released polymer can be isolated from the polysaccharide fraction of the water-soluble portion of tissue homogenates, thus providing as assay for this kind of metabolism. Promotion of xyloglucan metabolism by auxin begins within 15 minutes of hormone presentation. The effect increases with auxin concentration in a manner similar to the hormone effect on elongation. However, the xyloglucan effect of auxin occurs perfectly normally when elongation is completely blocked by mannitol. Metabolic inhibitors and Ca2+, on the other hand, inhibit auxin promotion of elongation and of xyloglucan metabolism in parallel. The results suggest that the changes in xyloglucan reflect the means by which auxin modifies the cell wall to cause elongation. 2 Present address: Department of Chemistry, University of Colorado, Boulder, Colo. 80302. 1 Research was supported by a National Science Foundation grant to P.M.R. and a National Science Foundation predoctoral fellowship to J.M.L. This content is only available as a PDF. © 1974 American Society of Plant Biologists This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model)
Journal
Plant Physiology – Oxford University Press
Published: Oct 1, 1974