Fern sporangia. Fluorescence light micrograph of sporangia on the underside of a fern frond. Sporangia are spore-producing receptacles found in clusters called sori. Each sporangium is packed with spores (blue), which are the fern's reproductive cells. A rim of thick-walled cells, the annulus (green), functions to open and rapidly close each sporangium when the spores are mature, releasing them into the environment. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / ROGELIO MORENO |
Bildgröße: | 5173 px × 3449 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |