Azalea (Rhododendron sp.) pollen,coloured scanning electron micrograph (SEM). The pollen grains are sprouting pollen tubes. A pollen tube is produced by a pollen grain when it lands on the pistil (female part) of a flower. The tube burrows through the pistil to the ovaries,carrying the male sex cells to them for fertilisation | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Nishinaga, Susumu |
Taille de l’image : | 3558 px × 4913 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |