Leaf of the Red oak in autumn colour
Numéro d’image : 11536605
| Leaf of the Red oak Quercus rubra,in autumn colour. The yearly colour change of the leaves of deciduous trees occurs as a biochemical process. A change is signalled by the accumulation of lipid droplets (fat) in the chloroplasts of leaf cells which contain the green chlorophyll pigment. As photosynthesis in the chloroplasts slows down due to shorter daylight hours and lipid production increases,leaf colour changes occur. Until finally the leaf loses its green colour. Enzymes in the abscission zone (point where the leaf breaks from the stem) weaken the cell walls and cause the leaf to fall. This leaf specimen was found in Scotland | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Bernard, George |
| Taille de l’image : | 3488 px × 5047 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
Prix pour cette image À partir de 45 €
Produit vendu
(Calendrier, Carte postale, Carte de vœux, Impression sur textile, Packaging etc)
À partir de 45 €
Usage commercial
(Affichage, Annonce presse, Annonce TV, Carte, Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 45 €
Éditorial
(Digital, Journal, Livre, Livre pratique, Magazine, Télévision etc)
À partir de 60 €
Usage non-commercial
(Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 120 €