Journal Article

12-Oxo-Phytodienoic Acid–Glutathione Conjugate is Transported into the Vacuole in Arabidopsis

Naoko Ohkama-Ohtsu, Yuko Sasaki-Sekimoto, Akira Oikawa, Yusuke Jikumaru, Shoko Shinoda, Eri Inoue, Yukiko Kamide, Tadashi Yokoyama, Masami Yokota Hirai, Ken Shirasu, Yuji Kamiya, David J. Oliver and Kazuki Saito

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 52, issue 1, pages 205-209
Published in print January 2011 | ISSN: 0032-0781
Published online November 2010 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcq181
12-Oxo-Phytodienoic Acid–Glutathione Conjugate is Transported into the Vacuole in Arabidopsis

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While exogenous toxic compounds such as herbicides are thought to be sequestered into vacuoles in the form of glutathione (GSH) conjugates, little is understood about natural plant products conjugated with GSH. To identify natural products conjugated with GSH in plants, metabolites in the Arabidopsis γ-glutamyl transpeptidase (ggt) 4 knockout mutants that are blocked in the degradation of GSH conjugates in the vacuole were compared with those in wild-type plants. Among the metabolites identified, one was confirmed to be the 12-oxo-phytodienoic acid (OPDA)–GSH conjugate, indicating that OPDA, a precursor of jasmonic acid (JA), is transported into the vacuole as a GSH conjugate.

Keywords: Conjugate; Glutathione; 12-Oxo-phytodienoic acid; Vacuole

Journal Article.  2622 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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