Sporangia and spores of the male fern
Numéro d’image : 11527274
| Light micrograph of the sporangia (spore sacs) and spores of the "male fern",Dryopteris filix-mas. The sporangia of Dryopteris are borne on the undersides of the leaf fronds in brown kidney- shaped structures known as sori. Each sporangium is a biconvex capsule in which the mature spores lie freely. Five ruptured sporangia are seen here. The prominent yellow structure around the edge of each sporangium wall is a band of thick-walled cells called the annulus. As the mature sporangium dries,the tension in the walls of the annulus causes the sporangium to rupture,expelling the spores which are then distributed by the wind. Magnification: x100 at 35mm size | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Power And Syred |
| Taille de l’image : | 5391 px × 3543 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
Prix pour cette image À partir de 45 €
Produit vendu
(Calendrier, Carte postale, Carte de vœux, Impression sur textile, Packaging etc)
À partir de 45 €
Usage commercial
(Affichage, Annonce presse, Annonce TV, Carte, Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 45 €
Éditorial
(Digital, Journal, Livre, Livre pratique, Magazine, Télévision etc)
À partir de 60 €
Usage non-commercial
(Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 120 €