Section through bark of Scots pine

Section through bark of Scots pine

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Caption: Pine bark. Polarised light micrograph of a cross- section through the bark of the Scots pine, Pinus sylvestris. Large cells (blue) represent the cork tissue of dead cells; between these are bands (yellow) of phloem or dead cortex. Concentric layers such as these correspond to growth rings, produced by the activity of cork cambium. As the bark grows outwards, these layers may peel off. The bark of a tree is important in fire and temperature resistance, and as an insect repellant layer. Pinus sylvestris is a very common pine in northern Europe. It grows to a height of up to 40 metres. Its timber is highly valued commercially. Magnification: x35 at 6x7cm size.

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Keywords: bark, botany, nature, phloem, pine, pinus sylvestris, plant, plants, scots, scots pine, type

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