Potted Calla Lily (Zantedeschia sp.) on windowsill. Image two of two illustrating phototropism, the bending of plants toward a source of light. Auxins, chemicals which stimulate cell growth in plants, migrate to the less-lit part of the stem and cause cells to elongate, bending the plant toward the light source to maximize light exposure and, therefore, photosynthesis. See JD1424 for the first image in the sequence. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Shields, Martin |
Taille de l’image : | 6930 px × 4873 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |