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Plant and Cell Physiology Advance Access originally published online on May 26, 2006
Plant and Cell Physiology 2006 47(7):1017-1021; doi:10.1093/pcp/pcj061
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© The Author 2006. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org

Short Communication

Constitutive Accumulation of cis-piceid in Transgenic Arabidopsis Overexpressing a Sorghum Stilbene Synthase Gene

Christine K. Y. Yu1,2, Corey N. W. Lam2, Karin Springob3, Jüergen Schmidt3, Ivan K. Chu2,4,* and Clive Lo1,*

1 Department of Botany, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China
2 Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China
3 Leibniz-Institut für Pflanzenbiochemie, D-06120 Halle/Saale, Germany
4 Genome Research Centre, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China

* Corresponding authors: Clive Lo, E-mail, clivelo{at}hkucc.hku.hk, Fax, +852-2858-3477; Ivan K. Chu, E-mail, ivankchu{at}hku.hk, Fax, +852-2857-1586.

Sorghum SbSTS1 was the first example of a stilbene synthase gene in monocots. Previously, we demonstrated that the gene was involved in defense responses. To examine its biochemical function in planta, SbSTS1 was overexpressed in transgenic Arabidopsis. Metabolite analysis revealed that cis-resveratrol glucoside (piceid) accumulated as the major stilbene in the transgenic lines. Using liquid chromatography–tandem mass spectrometry (LC–MS/MS) in selected reaction monitoring mode, up to 580 µg g–1 FW of cis-piceid were detected in 2-week-old plants, which represent a convenient source of the cis-isomers for pharmacological investigations. Our results also suggested the presence of unknown stilbene isomerase activities in Arabidopsis.

(Received April 17, 2006; Accepted May 10, 2006)
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