Scots pine (Pinus sylvestris) old stem

Numéro d’image : 11712628
Scots pine (Pinus sylvestris) old stem
Scots pine (Pinus sylvestris) old stem. Light micrograph of a section through a stem from a Scots pine tree,showing remains of the epidermis and cuticle,with the cork cambium and developing cork (brown),phellogen and phelloderm. From outside in: cortex of parenchyma cells,consisting of scattered large resin canals (red) and small resin canals (blue); ring of secondary phloem composed of sieve tube cells (blue-black) and albuminous cells; under the phloem is a ring of vascular cambium; secondary xylem (brown),composed large tracheid cells and parenchyma cells; primary xylem,consisting of metaxylem and protoxylem; pith (centre) composed of parenchyma cells; principal and subsidiary medullary rays (blue). The annual growth rings of autumn wood (small
Licence : Droits gérés
Crédit: Science Photo Library / Wheeler, Dr. Keith
Taille de l’image : 4923 px × 3938 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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