Journal
PLANT PHYSIOLOGY
Volume 164, Issue 1, Pages 48-54Publisher
AMER SOC PLANT BIOLOGISTS
DOI: 10.1104/pp.113.229807
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Funding
- Australian Research Council [CE0561495]
- Max Planck Society
- Australian Research Council [CE0561495] Funding Source: Australian Research Council
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Secondary metabolites derived from benzoic acid (BA) are of central importance in the interactions of plants with pests, pathogens, and symbionts and are potentially important in plant development. Peroxisomal beta-oxidation has recently been shown to contribute to BA biosynthesis in plants, but not all of the enzymes involved have been defined. In this report, we demonstrate that the peroxisomal ATP-binding cassette transporter COMATOSE is required for the accumulation of benzoylated secondary metabolites in Arabidopsis (Arabidopsis thaliana) seeds, including benzoylated glucosinolates and substituted hydroxybenzoylcholines. The ABNORMAL INFLORESCENCE MERISTEM protein, one of two multifunctional proteins encoded by Arabidopsis, is essential for the accumulation of these compounds, and MULTIFUNCTIONAL PROTEIN2 contributes to the synthesis of substituted hydroxybenzoylcholines. Of the two major 3-ketoacyl coenzyme A thiolases, KAT2 plays the primary role in BA synthesis. Thus, BA biosynthesis in Arabidopsis employs the same core set of b-oxidation enzymes as in the synthesis of indole-3-acetic acid from indole-3-butyric acid.
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