Germinating lily pollen. Coloured scanning electron micrograph (SEM) of lily (Lilium sp.) pollen grains that have sprouted pollen tubes. Pollen contains the male sex cells of a plant. Pollen tubes are produced when a pollen grain lands on the pistil (female part) of a flower. The tube burrows down into the pistil to reach the ovaries,where it fertilises the ovum (egg cell) | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Nishinaga, Susumu |
Bildgröße: | 3913 px × 3169 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |