Unable to connect to database - 05:05:49 Unable to connect to database - 05:05:49 SQL Statement is null or not a SELECT - 05:05:49 SQL Statement is null or not a DELETE - 05:05:49 Botany & Plant Biology 2007 - Abstract Search
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Abstract Detail


Intracellular Signaling

Binder, Brad M. [1], Rodgriguez, Fernando I. [2], Bleecker, Anthony B. [3], Patterson, Sara E. [4].

Effects of Coinage Metals on Ethylene Binding and Action in Arabidopsis.

It has been previously shown that Cu(I) ions act as a cofactor for ethylene binding to exogenously expressed ETR1 receptors from Arabidopsis thaliana. Interestingly, of ten other transition metals previously tested, only Ag(I) ions also stimulated ethylene-binding activity. This observation is of interest since Ag(I) is a well known inhibitor of ethylene action in planta and suggests that Ag(I) can occupy the binding site and interact with ethylene but does not permit changes in the receptor necessary for downstream signaling. Both copper and silver are Group 11 transition metals, also known as coinage metals, that also includes gold. In this study we compared the effects of gold ions with those of copper and silver ions on ethylene binding in exogenously expressed ETR1 receptors and on ethylene growth responses in etiolated Arabidopsis seedlings. Our results indicate that gold ions can also stimulate ethylene binding, However, unlike silver ions, gold ions do not block ethylene action in plants. We investigated the nature of Ag(I) ions unique action.


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1 - University of Wisconsin, Department of Horticulture, 1575 Linden Drive, Madison, WI, 43706, usa
2 - BD Biosciences
3 - UW-Madison, Botany; Deceased
4 - University of Wisconsin, Horticulture

Keywords:
ethylene
Signal transduction
receptors.

Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P33003
Abstract ID:220


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