Pincushion hakea leaf, light micrograph

Pincushion hakea leaf, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Pincushion hakea leaf. Polarised light micrograph of a transverse section through the leaf of a pincushion hakea (Hakea laurina) plant. This is a drought plant (xerophyte). The leaf is needle-shaped to reduce the area for water loss. The epidermis is covered in a thick cuticle (orange-blue). The stomata (brown with elongated blue and orange cups) are sunken to trap moist air. There are two layers of palisade mesophyll cells (brown-black) that radial sclereids (yellow, pink, blue) help to support. The vascular bundles are made up of small cells (multicoloured). Magnification: x103 when printed 10 centimetres wide.

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Keywords: adaptation, adaptations, adapted, angiosperm, angiosperms, arid, biological, biology, botanical, botany, bundles, cell, cells, cuticle, drought plant, dry, epidermis, flora, hakea laurina, leaf, light micrograph, light microscope, nature, needle shaped, needle-shaped, palisade mesophyll, pincushion hakea, plant, plants, polarised light, stem, stoma, stomata, tissue, vascular bundle, xerophyte, xerophytic

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