Section through a marram grass leaf

Section through a marram grass leaf

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Credit: SIDNEY MOULDS/SCIENCE PHOTO LIBRARY

Caption: Light micrograph of a transverse section through a leaf of marram grass, Ammophila arenaria, a common coloniser of coastal sand dunes. The leaf is rolled into a vertical tube and bears internal spines (pink) which discourage foraging animals. The deeply- pigmented regions are photosynthetic tissues and the large-celled, lace-like tissue is sclerenchyma. The inner leaf surface is deeply grooved, with the stomata (breathing pores) set in the bottom of the grooves to prevent excessive evaporation. Vascular bundles (circular objects, faintly outlined in pink and each containing two large eye-like cavities) are visible near the base of each ridge. Magnification: x36 at 35mm size.

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Keywords: ammophila arenaria, botany, leaf, leaves, marram grass, nature, plant, plants, spike, spikes, spine, spines, transverse light micrograph

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