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A new perspective on auxin perception
Department of Plant Physiology and Biochemistry, St. Petersburg State University, 199034 St. Petersburg, Russia.
Stockholm University, Faculty of Science, Department of Botany.
2010 (English)In: Journal of plant physiology (Print), ISSN 0176-1617, E-ISSN 1618-1328, Vol. 167, no 6, 417-422 p.Article in journal (Refereed) Published
Abstract [en]

An important question in modern plant biology concerns the mechanisms of auxin perception. Despite the recently discovered soluble receptor, the F-box protein TIR1, there is no doubt that another type of signal perception exists, and is linked to the plasma membrane. Two models for the receptor have been suggested: either the receptor includes a protein kinase, or it is coupled with a G-protein. We propose a third model, acting through Ca2+-channels in the plasma membrane. The model is based on the revealed rapid auxin-induced reactions, including changes in the membrane potential, shifts in cytosol concentration of Ca2+ and H+ and modulation of cell sensitivity to hormones by the external Ca2+ concentration. Detailed inhibitor analysis with both living cells and isolated plasma membranes show that auxin might directly stimulate Ca2+ transport through the plasma membrane. A hypothetical scheme of auxin perception at the plasma membrane is suggested together with further transduction events. In addition, comparative analyses of auxin and serotonin perceptions are provided.

Place, publisher, year, edition, pages
Elsevier , 2010. Vol. 167, no 6, 417-422 p.
Keyword [en]
ABP 1; Auxin perception; Ca2+-channel; Plasma membrane; Serotonin
National Category
Biological Sciences
URN: urn:nbn:se:su:diva-49366DOI: 10.1016/j.jplph.2009.12.014OAI: diva2:377473
Available from: 2010-12-14 Created: 2010-12-14Bibliographically approved

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Lindberg, Sylvia
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