Section through a marram grass leaf

Section through a marram grass leaf

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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 & this image shows (in section) its spiny, convoluted inner surface. 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 & each containing two large eye-like cavities) are visible near the base of each ridge. Magnification: x50 at 35mm size.

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

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