Lime tree stem,light micrograph

Bildnummer 11565147
Lime tree stem,light micrograph
Lime tree stem. Light micrograph of a transverse section through the one-year-old woody stem of a lime (Tilia cordata) tree. The outer layer is cork (brown),underneath which is a layer of collenchyma (yellow-green). The raised areas in the cork are breathing pores (lenticels). The lower cortex has bands of phloem fibres (red-brown),between which are phloem sieve tubes (green). Under the phloem is a ring of cambium (brown circle) and a thick ring of wood (xylem,brown-green) composed of xylem vessels (large circular holes) and tracheid cells. The medullary rays (radial lines,yellow-green) transport water and minerals to the outside of the stem. The solid pith (centre) is composed of parenchyma cells (green-yellow). Magnification: x103 when printed 10 centimetres wide
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Wheeler, Dr. Keith
Bildgröße: 5192 px × 5409 px
Modell-Rechte: nicht erforderlich
Eigentums-Rechte: nicht erforderlich
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