Section through leaf stalk of lime tree

Section through leaf stalk of lime tree

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Credit: J.C. REVY, ISM/SCIENCE PHOTO LIBRARY

Caption: Petiole of leaf. Light micrograph of a transverse (cross) section through a petiole of the lime (or linden) tree, Tilia sp. The petiole is the stalk of a leaf. Here, two vascular bundles are seen (at centre) surrounded by tissue of the cortex. The outer cortex contains strengthened collenchyma cells (pink), and an inner parenchyma (white). The vascular tissue is strengthened by sclerenchyma (brown). Vascular bundles consist of conducting cells: phloem (pink) which transports carbo- hydrates produced by photosynthesis in the leaf; xylem (white stacks of cells) that conducts water. A central pith is visible. Magnification: x7 at 35mm size.

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Keywords: botany, collenchyma, leaf, light micrograph, lime petiole, nature, petiole, plant, plants, sclerenchyma, tilia sp.

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