Lime tree stem,light micrograph

Bildnummer 11619030
Lime tree stem,light micrograph
Lime tree stem. Light micrograph of a section through the stem of a lime tree (Tilia europaea). The outer epidermis has been shed and replaced by a layer of cork (dark red). Under the cork is the outer cortex layer of flexible collenchyma tissue (dark blue and red) and a lower cortex of parenchyma (blue). Next is a ring of phloem (blue) with large sieve tubes,companion cells and fibres (pink). The phloem is broken by primary medullary rays (blue,triangular) and thin subsidiary medullary rays (dark blue). Next is a ring of xylem (light pink) with large files of vessels and small woody parenchyma (dark red-brown). There are two yearly growth rings,which have large vessels laid down in the spring and small vessels in the previous autumn. Magnification:
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Wheeler, Dr. Keith
Bildgröße: 5789 px × 3060 px
Modell-Rechte: nicht erforderlich
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