Sunflower pistil. Coloured scanning electron micrograph (SEM) of a sunflower (Helianthus annuus) pistil. Pollen grains (round and spiky,orange) are seen on the pistil. Pistils hold a plant's female reproductive structures. They contain one or more carpels,which,in turn,contain a stigma,style and an ovary. Within the ovaries are the ovules,the female gametes (sex cells). The ovaries are fertilised by pollen grains,the male gametes. Magnification: x85 when printed at 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Nishinaga, Susumu |
Bildgröße: | 3739 px × 2855 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |