Sycamore pollen grain

Numéro d’image : 12525944
Sycamore pollen grain
Sycamore pollen grain. Coloured scanning electron micrograph (SEM) of a pollen grain of the sycamore tree (Acer pseudoplatanus). This grain has triangular symmetry, and has a rough outer coating. This coating aids the pollen in its dispersal by helping it stick to the bodies of insects which come to feed on the flowers. When the pollen grain containing the male gametes lands on the stigma (female part) of a sycamore flower, it germinates. A pollen tube grows out of the pollen grain into the stigma, and the male uclei"" travel down it towards the ovaries. When an ovule in the ovary is then fertilized, a seed is formed. Magnification: x3, 400 at 6x6cm size."
Licence : Droits gérés
Crédit: Science Photo Library / EYE OF SCIENCE
Taille de l’image : 2674 px × 2646 px
Model Release : Non requis
Property Release : Non requis
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  • All moral rights asserted. Recolouring or alteration of the image is prohibited without permission.

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