Mistletoe growing on a tree

Numéro d’image : 11536089
Mistletoe growing on a tree
Growth of mistletoe Viscum album on a deciduous tree (probably black poplar Populus nigra). Mistletoe grows on a no. of coniferous & deciduous trees; apple & the black poplar are the most well known. Seeds are carried onto the tree by birds (particularly thrushes) in autumn & germinate in spring. The bark is penetrated by a "sinker" which grows into & taps the vascular system (xylem) of the host,removing water & minerals: the parasitism involves only water & minerals; mistletoe produces its own carbohydrate through photosynthesis. In subsequent years the root system may extend,possibly depriving the host of enough water that it dies back
Licence : Droits gérés
Crédit: Science Photo Library / Bartel, Alex
Taille de l’image : 4237 px × 4252 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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