Fern (Dryopteris filix-mas) prothallus. Light micrograph of a section through the prothallus of a 'male fern',showing the sex organs: the male antheridia (purple) and female archegonia (pink). The prothallus is the gametophyte stage in the life-cycle of a fern. It develops from a germinating spore and usually consists of a number of rhizoids (root-like hairs) and the sex organs. Magnification: x6 when printed 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wheeler, Dr. Keith |
Bildgröße: | 4898 px × 3920 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |