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Plant Physiol, September 2001, Vol. 127, pp. 305-314
Isoprenoid Biosynthesis. Metabolite Profiling of Peppermint Oil
Gland Secretory Cells and Application to Herbicide Target
Analysis1
B. Markus
Lange,2
Raymond E.B.
Ketchum, and
Rodney B.
Croteau*
Institute of Biological Chemistry, Washington State University,
Pullman, Washington 99164-6340
Two independent pathways operate in plants for the synthesis of
isopentenyl diphosphate and dimethylallyl diphosphate, the central
intermediates in the biosynthesis of all isoprenoids. The mevalonate
pathway is present in the cytosol, whereas the recently discovered
mevalonate-independent pathway is localized to plastids. We have used
isolated peppermint (Mentha piperita) oil
gland secretory cells as an experimental model system to study the
effects of the herbicides fosmidomycin, phosphonothrixin, methyl
viologen, benzyl viologen, clomazone, 2-(dimethylamino)ethyl diphosphate, alendronate, and pamidronate on the pools of metabolites related to monoterpene biosynthesis via the mevalonate-independent pathway. A newly developed isolation protocol for polar metabolites together with an improved separation and detection method based on
liquid chromatography-mass spectrometry have allowed assessment of the
enzyme targets for a number of these herbicides.
1
This work was supported by a grant from the U.S.
Department of Energy.
2
Present address: Torrey Mesa Research Institute,
Syngenta, Research and Technology, 3115 Merryfield Row, San Diego, CA
92121-1125.
*
Corresponding author; e-mail croteau{at}mail.wsu.edu; fax
509-335-7643.
© 2001 American Society of Plant Physiologists
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