Pin cushion leaf. Polarised light micrograph of a transverse section through a pinchusion (Hakea laurina) leaf. The leaf of this plant has a number of adaptations that help it to minimise water loss through transpiration. It is covered in a thick cuticle (see-through,top) and its stomata (leaf pores,one seen at centre) are sunken with a 'cup' above them that traps moist air. Also seen are palisade mesophyll cells (red),which contain chloroplasts the site of photosynthesis,and radial sclereid cells (bright pink),thick-walled cells that provide structural support. Magnification: x230 when printed at 10 centimetres wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wheeler, Dr. Keith |
Taille de l’image : | 5616 px × 3744 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |