Daffodil pollen grains. Coloured scanning electron micrograph (SEM) of pollen grains from a daffodil flower (Narcissus pseudonarcissus). The grains have a highly sculptured outer wall (exine),which may assist in their dispersal by improving their adherence to pollinating insects. The characteristic surface of a pollen grain is used by botanists to recognise and classify plants. Each pollen grain contains a male gamete (reproductive cell) that is intended to fertilise an egg or ovule (female gamete),and initiate the formation of a seed for a new plant. Magnification: x900 when printed at 10 centimetres wide | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Power And Syred |
Taille de l’image : | 5687 px × 4266 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |