Fern spore capsule,polarised light micrograph. Transverse section through the frond of a hart's tongue fern (Phyllitis scolopendrium),showing the sporangia (centre). On the underside of the frond is a lens-shaped structure called a sori. This contains numerous stalked sporangia (round),containing reproductive spores. The edge of the sori is made up of thick-walled cells (bright red,green,and yellow),which help to disperse the spores by exploding. Magnification: x100 when printed at 10 centimetres wide | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wheeler, Dr. Keith |
Bildgröße: | 5997 px × 4665 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |