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Abstract Detail


Lipids

Peters, Carlotta [1], Wang, Xuemin [2], Shivakumar, Devaiah [2], Wood, Tara [3].

Functional Characterization of the Putative PC-PLC Gene Family in Arabidopsis.

Phospholipids are vital cellular components, providing structural properties for cell membranes and second messengers for signal transduction. Phospholipids can be hydrolyzed by distinctive groups of enzymes called phospholipases, such as PLA, PLC, and PLD. PLC, which hydrolyzes phospholipids to produce diacylglycerol (DAG) and a phosphorylated head group, can be grouped into two classes. PI-PLC hydrolyzes phosphoinositol 4,5-bisphosphate to produce second messengers IP3 and DAG, and this activity has been implicated in various cellular processes, such as DNA synthesis and stomatal movement. However, little is know about the action of PC-PLC that hydrolyzes common membrane phospholipids, including phosphatidylcholine. The Arabidopsis genome has six putative PC-PLC genes. We have been taking systematic approaches to characterize their functions. Patterns of expression of these genes in tissues and selective stress conditions have been determined. T-DNA insertion mutants for these genes have been identified. The mutants have been screened for alteration in response to abiotic stresses and hormones. Results will be presented on the involvement of specific PC-PLCs in response to abscisic acid, phosphate deficiency, drought, and salt stresses.


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1 - University Of Missouri St Louis, Biology, 8001 Natural Bridge Road, R223, St Louis, MO, 63121, USA
2 - University of Missouri St Louis, Biology
3 - q

Keywords:
none specified

Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P21005
Abstract ID:531


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