Closed stoma on Kalanchoe leaf,SEM

Numéro d’image : 11649548
Closed stoma on Kalanchoe leaf,SEM
Closed stoma on Kalanchoe leaf. Coloured scanning electron micrograph (SEM) of a leaf from the succulent Kalanchoe blossfeldiana,showing a closed stoma (centre). Stomata are pores that are the site of gaseous exchange in the plant. The opening and closing of the stomata is controlled by semicircular guard cells. When the guard cells are turgid the stomata are open and when they are flaccid the stomata are closed. K. blossfeldiana is adapted to hot,arid conditions and opens its stomata at night,which is the opposite of most plants,to prevent water evaporation. It absorbs carbon dioxide through the stomata at night and converts it to an organic acid for storage. When the plant starts photosynthesising during the day it uses the stored carbon dioxide. The flecks on the surface are wax. Magnification: x400 when printed at 10 centimetres tall
Licence : Droits gérés
Crédit: Science Photo Library / Burgess, Dr. Jeremy
Taille de l’image : 3562 px × 4965 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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