Unable to connect to database - 04:38:42 Unable to connect to database - 04:38:42 SQL Statement is null or not a SELECT - 04:38:42 SQL Statement is null or not a DELETE - 04:38:42 Botany & Plant Biology 2007 - Abstract Search
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Abstract Detail


Cell-to-Cell and Long Distance Signaling

Alvarez, Rosie [1], Argumedo, Ruby [2], Nava, Susana [2], Vellanoweth, Robert [2].

Oxylipin Profile at the Bolting Transition in Arabidopsis thaliana.

In Arabidopsis thaliana, the transition from vegetative to reproductive growth is a highly regulated developmental process involving long distance communication between leaves and the floral meristem. Studies in our lab have shown an increase in lipoxygenase activity at the bolting transition. Lipoxygenase catalyzes a primary step in the biosynthesis of oxylipins, long-distance signaling molecules essential for development and for responses to environmental stressors. We hypothesize that the increase in lipogygenase activity at the bolting transition results in the synthesis of specific oxylipin signals that are transported between leaves and floral structures. In addition, microarray studies have shown a transient increase in the expression of lipid transfer proteins LTP3 and LTP4 in leaves at the bolting transition. Given that LTPs have also been implicated in the long-distance transport of signaling molecules, we propose a role for LTP3 and 4 as mediators of oxylipin signaling at the bolting transition. The goals of this project are to utilize gas chromatography in conjunction with mass spectrometry to characterize changes in the oxylipin profile of Arabidopsis thaliana at the bolting transition and to determine the chemical structure of lipids bound to LTP3 and 4 in vivo.


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1 - California State University, Los Angeles, Chemistry and Biochemistry, 5151 State University, Los Angeles, Ca, 90032, United States of America
2 - California State University, Los Angeles, Chemistry and Biochemistry

Keywords:
lipid transfer protein
oxylipin
floral induction.

Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P34019
Abstract ID:2302


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