Anther and pollen of Galium aparine
Bildnummer 13435295
| Scanning electron micrograph of a dehiscing anther of goosegrass, Galium aparine. The picture shows pollen grains (orange) that have been shed by the anther at the picture centre (pale green). Pollen is the male microspore; upon contacting a receptive female stigma, it divides to produce a vegetative cell and a generative cell. The latter divides to produce sperm cells, that are conveyed to the ovary of the receiving flower through a tube produced by the vegetative cell. This leads to fertilisation of an egg cell and thus to the growth of a seed. Goosegrass is a common arable and garden weed. The plant is covered with hooks, that enable it to climb surrounding vegetation. The flower is protandrous; its pollen matures before the stigma is receptive, favouring cross-pollination by insects. The seeds can be roasted, ground, and used to make a low caffeine coffee subsitute. Mag x 50 at 10x8 | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Burgess, Dr. Jeremy |
| Bildgröße: | 3468 px × 5212 px |
| Modell-Rechte: | nicht erforderlich |
| Restrictions: | - |
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