How plants evolved thousands of scent and defense chemicals
Wyatt G, Yasmin F, Donaldson AR, Schumaker SL, Gueorguieva GA
Plant Signaling
The smell of crushed tomato leaves, the sharp scent of pine sap on your hands, and the bitter defense compounds in a dandelion all come from the same ancient chemical toolkit this review maps out, so understanding it helps explain why your garden smells and tastes the way it does.
Terpenoids are a giant family of plant chemicals that include hormones controlling growth, pigments that color flowers, and the sharp-smelling oils that repel pests or attract pollinators. This review pulls together decades of research to explain how plants kept duplicating and reshuffling their genes over billions of years to build this huge chemical toolkit, and how scientists are now using that knowledge to make new medicines, fuels, and fragrances.
Key Findings
Terpenoid metabolism traces back more than two billion years, evolving alongside early biological membranes
Gene duplication events repeatedly expanded terpene synthase and cytochrome P450 enzyme families, enabling new compound classes across eight terpenoid types (hemi- through poly- and mero-terpenoids)
Conserved terpenoids function as hormones and pigments while species-specific ones drive defense, pollinator attraction, allelopathy, and root-microbiome signaling
chevron_right Technical Summary
Plants make thousands of different terpenoid compounds, from the scent of pine needles to the pigments in flowers, and this review traces how that chemical diversity evolved over two billion years and why it matters for medicine, biofuel, and agriculture today.
Abstract Preview
Original paper
Growth, signals, and survival: the evolutionary divergence of terpenoid metabolism in terrestrial plants.
Covering: primarily from 2011 to 2026Terpenoids are an ancient and immensely diverse class of natural products. Since their emergence more than two billion years ago alongside early biological memb...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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