Fruit formation,computer artwork. At left is a carpel,the female reproductive structure of a plant. A pollen tube (red line) has grown down from a pollen grain (male sex cell,red dot) to the ovary. Nuclei from the pollen grain fuse with the egg cell in the ovary to form a zygote and also with polar nuclei to form a cell that will become nutrient-rich endosperm for the seed. After fertilisation there is a period of rapid cell division followed by a period of cell expansion,which greatly increases the volume of the fruit | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Leroy, Francis / Biocosmos |
Taille de l’image : | 5000 px × 3505 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |