Pea flower pollination. Coloured scanning electron micrograph (SEM) of pollen grains (ovals) on the stigma of a garden pea flower (Pisum sativum). The pollen grains,which contain male genetic material,have become trapped by the stigma's papillae (hair-like structures,green). The stigma is part of the female reproductive structure (pistil),which is formed from one or more carpels. Each carpel consists of a stigma,a style and an ovary (not seen). If the female sex cells (ovules) in the ovary become fertilised by the pollen grains' male sex cells,the carpel may ripen to produce a fruit containing seeds | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Nishinaga, Susumu |
Bildgröße: | 3621 px × 4839 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |