Branched hair in leaf stalk of water lily

Branched hair in leaf stalk of water lily

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Caption: False-colour scanning electron micrograph of the inside of a leaf stalk, or petiole, of the water lily Nymphaea album. The water lily has overcome the difficulty of getting air to its submerged roots by having large-diameter open tubes within the leaf petiole. These hollow tubes are connected directly to large air spaces in the leaves, which contribute to the plant's buoyancy. The tubes are lined with epidermal cells & studded with branched trichomes (hairs). Some tubes contain crystals of calcium oxalate (particles, centre) which is poisonous & may act as a deterrent to burrowing animals. Magnification: x50 at 35mm size, x80 at 6x6cm size.

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Keywords: botany, calcium oxalate, leaf, leaf stalk, nature, nymphaea album, petiole, plant, plants, scanning electron micrograph, sem, trichome, water lily

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