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Isoprenoids are a hugely diverse family of compounds derived from the C5 precursors isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP). Although all free-living organisms synthesize isoprenoids, they are particularly abundant and diverse in plants, with tens of thousands structures known to date. The highest variety of plant isoprenoids are specialized (secondary) metabolites that participate in the interaction of plants with their environment. These include pigments, volatiles, and defense compounds, some of which have applications in industry and agriculture. For example, isoprenoid drugs are used against cancer (taxol) or malaria (artemisin). But plants also synthesize isoprenoids with essential (primary) functions in respiration (ubiquinone), photosynthesis (carotenoids, chlorophylls, tocopherols, phylloquinones, plastoquinone), membrane architecture (sterols), and growth regulation …