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).
KeywordsMolecular Action Inositol Trisphosphate Carrot Cell Auxin Action Auxin Receptor
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