pollen tube उदाहरण वाक्य

उदाहरण वाक्य

1. Tip growth is a process that has many similarities in diverse walled cells such as pollen tubes, root hairs, and hyphae.
2. In the flower, the pollen tube then grows towards the ovule where it discharges the sperm produced in the pollen grain for fertilization.
3. It has been suggested that the pollen expression of pectate lyase genes might relate to a requirement for pectin degradation during pollen tube growth.
4. Use of these devices may aid our understanding pollen tube guidance and the mechanism of sexual reproduction in " A . thaliana ."
5. The vegetative cell then produces the pollen tube, a tubular protrusion from the pollen grain, which carries the sperm cells within its cytoplasm.
6. An example of chemo-tropic movement can be seen during the growth of the pollen tube, where growth is always towards the ovules.
7. Fertilization of flowers by pollen is achieved because the ovary releases chemicals that produce a positive chemo-tropic response from the developing pollen tube.
8. No style exists, but a broad stigmatic crest along the margin allows pollen tubes access along the surface and between hairs at the margins.
9. When a pollen grain makes contact with the female stigma, the pollen grain forms a pollen tube that grows down the style into the ovary.
10. The main donors to the pathway were the genes associated with the arbuscular mycorrhiza symbiosis genes, the pollen tube formation genes and the haemoglobin genes.