Study suggests evolutionary history regulates fine root lifespan in tree species across the world

Fine roots (≤2 mm in diameter), the main conduit for resource uptake in the plant-soil continuum, are one of the most metabolically active organs of trees. Due to the difficulty of directly observing root dynamics, quantifying fine root lifespan can be challenging. Many factors may concurrently regulate fine root lifespan, but the relative importance of these controlling factors is not fully understood.