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United States Department of Agriculture

Agricultural Research Service

Research Project: Chemical Biology of Insect and Plant Signaling Systems

Location: Chemistry Research Unit

Title: Elucidating induced plant defenses: the use of targeted metabolomics as a bridge from elicitation to response

Author
item Schmelz, Eric

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: May 23, 2014
Publication Date: N/A

Technical Abstract: Dynamic plant defense responses to biotic attack involve the perception of specific biochemical elicitors associated with the offending agent, activation of signaling cascades, and the production of small molecules with complex protective roles. Chemical analyses are essential empirical tools for elucidating many levels of these plant innate immune responses. We briefly summarize our use of targeted metabolomics and highlight the utility of these approaches in understanding crop plant defenses. Enabled by the significant use of gas chromatography (GC) / mass spectrometry (MS) we discuss the quantitative relationships of phytohormones with induced plant volatiles and detail the discovery of 1) novel insect-associated elicitors, 2) two new classes of maize phytoalexins, and 3) new oxylipin defenses and signals. In each example, the careful consideration of tissue type, age, localization, timing and minor unknown analytes is essential for research progress.

Last Modified: 11/21/2014
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