Fern frond, light micrograph (LM). Transverse section through the frond of a fern (Cyrtomium falcatum). A central vascular bundle (meristele) with central xylem tissue (red) surrounded by phloem (lblue) is visible. A trophophyll frond is a vegetative leaf analogous to the typical green leaves of seed plants that does not produce spores, instead only producing sugars by photosynthesis. A sporophyll frond is a fertile leaf that produces spores borne in sporangia that are usually clustered to form sori. Magnification: x25 when printed at 10 centimetres wide. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 5120 px × 3414 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |