Sweet potato stem. Light micrograph of a transverse section through part of a sweet potato (Ipomoea batatas) stem. At bottom is a large area of pith,consisting of parenchyma cells. Above this are xylem (red) and then phloem (blue) cells,which transport water and carbohydrates around the plant respectively. Next is a very thin ring of parenchyma cells (dark pink) and then collenchyma tissue (blue and black),before the outer layers of epidermis and cuticle. Magnification: x100 when printed at 10 centimetres wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wheeler, Dr. Keith |
Taille de l’image : | 3848 px × 7324 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |