mutualism

Glaucous Boxelder

Above demonstrates the glaucous/waxy bloom on a boxelder sapling (Acer negundo). This epicuticular wax functions as a hydrophobic barrier, preventing excess water loss in the new green growth of many plants. The slippery surface of a waxy bloom can both defend against and attract tiny herbivores (e.g. insects). In some cases there is a mutualistic …

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