Nettle leaf in polarised light

Nettle leaf in polarised light

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Common stinging nettle (Urtica dioica) leaf, taken in polarised light with retarders. The leaf is at right and the petiole (leaf stem) is at left. This is a cleared leaf, one that has been treated to make the veins and other leaf structures more visible. The leaf is seen from the underside, showing the stinging and non-stinging trichomes (hair-like structures). The stinging trichomes are the long, sharp ones, and the non-stinging trichomes are the shorter ones.

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Keywords: anatomical, anatomy, biological, biology, botanical, botany, cleared, close-up, common stinging nettle, defence, defensive, epidermal, epidermis, hair, hairs, leaf, microscopy, nature, non-stinging, petiole, plant, polarised, polarised light, polarized, protection, protective, retarder, retarders, sharp, silicified, soft, sting, stinging, surface, trichome, trichomes, urtica dioica

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