When did liverwort oil body cells originate? Here, Susan and I provide quantitative evidence that they emerged by at least the Middle Devonian (~390 Ma!), shedding light on a key anti-herbivory defense mechanism of early land plants!
Homology of the dark cells of Paleozoic liverworts with the specialized oil body cells of modern liverworts (Marchantiophyta)
Tremblay and Mercadal
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