Aerial roots of common ivy, Hedera helix
Numéro d’image : 13297802
| Developing aerial roots of common ivy, Hedera helix. The picture shows a stem from an ivy plant growing against a wall. The stem in the picture is not in contact with the wall, but is producing aerial roots on its shaded side (to right). The roots are growing away from the light; an example of negative phototropism. Their function is attach the plant to its support, whether the bark of a tree or the wall of a house. The roots extend until they touch the support, where they penetrate any available crevices. Large crevices can accommodate whole roots; small crevices can be penetrated by fine outgrowths from individual cells. This self-supporting mechanism enables the plant to grow to considerable height. This in turn results in exposure to higher light levels, promoting the production of flowers and seeds | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Burgess, Dr. Jeremy |
| Taille de l’image : | 3468 px × 5212 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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