Transpiration in celery stalks

Numéro d’image : 11696754
Transpiration in celery stalks
Stalks of celery (Apium graveolens var. dulce) in plain water and dyed blue. The stem at right was placed in water that had blue food colouring added to it. The leaves of the celery transpire,they allow water to evaporate as an outcome of the process of gaining carbon dioxide from the air. Water flows upward through the stem by a combination of capillary action and the difference in hydrostatic pressure. Water enters the stem and roots by osmosis,bringing with it dissolved nutrients or,in this case,food colouring
Licence : Droits gérés
Crédit: Science Photo Library
Taille de l’image : 4473 px × 4473 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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