Dyer's greenweed stem,light micrograph

Numéro d’image : 11565020
Dyer's greenweed stem,light micrograph
Dyer's greenweed stem. Polarised light micrograph of a transverse section through the stem of a dyer's greenweed (Genista tinctoria) plant. This stem has eight ribs with deep grooves with hairs,which reduce water loss through transpiration. Under the thick-walled epidermis (outer layer) with thick cuticle are layers of palisade-like cells (red-brown) containing chloroplasts (chlorenchyma) for photosynthesis. The vascular cylinder is made up of (from outside inwards) a ring of phloem sieve tubes (red black alternating patches),a ring of cambium (brown black),and xylem (blue white). In the centre of the stem is the pith made up of large celled parenchyma tissue (white-blue). Magnification: x103 when printed 10 centimetres wide
Licence : Droits gérés
Crédit: Science Photo Library / Wheeler, Dr. Keith
Taille de l’image : 5648 px × 4949 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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