About the Search for the Molecular Action of High-Affinity Auxin-Binding Sites on Membrane-Localized Rapid Phosphoinositide Metabolism in Plant Cells
One possible strategy for the clarification of the molecular action of auxin is founded on the so-called auxin receptor hypothesis. This hypothesis means that auxin acts only after its binding to a specific subcellular site, the auxin receptor. In other words, the auxin binding reaction should induce a hormone-specific effect. Though the detection of numerous auxin binding sites on membranes and soluble proteins from various plants upto now functions other than those of auxin transport sites are surely the most difficult to establish. As consequence the molecular mechanism of auxin action is one unsolved problem of plant cell biology concerning the mechanism of signal recognition and signal processing in the single plant cell (FIRN,1983; RUBERY,1984).
KeywordsHydrolysis Manganese Hepes Inositol Monophosphate
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- Firn, R.D. and Kearns, A.W. (1983) The search for the auxin receptor. In: Wareing, P. (ed.) Plant Growth Substances 1982 pp 385–393 Academic Press New YorkGoogle Scholar
- Strasser, H., Hoffmann, C., Grisebach, H. and Matern, U. (1986) Are polyphosphoinositides involved in signal transduction of elicitor-induced phytoalexin synthesis in cultured plant cells? Z. Natursch. 41c, 717–724.Google Scholar
- Zbell, B. (1983) Über die molekulare Wirkung von Auxin. Biochemische Untersuchungen an isolierten Membranen aus in vitro kultivierten Zellen von Daucus carota L. Doctoral Thesis, Free University of Berlin.Google Scholar
- Zbell, B. (1985) An auxin mediated control of an intracellular proton pump via reversible protein phosphorylation and its consequence for the primary action of auxin. In: Proc. 12th Internat. Conf. Plant Growth Subst., Heidelberg, Abstract 1003, p 62Google Scholar
- Zbell, B. and Morre, D.J. (1986) The molecular action of auxin. In: Models in Plant Physiology, Biochemistry and Technology (D.W. Newman and K.G. Wilson, eds.). CRC Press, Boca Raton, Florida, (in press)Google Scholar