* Initial Role: The tube nucleus is involved in the growth and guidance of the pollen tube towards the ovule. It plays a crucial role in the development of the pollen tube, helping to direct its growth and ensure it reaches the target location.
* Potential Fate: There are different possibilities for the fate of the tube nucleus:
* Degeneration: Some research suggests the tube nucleus may degenerate or break down after the pollen tube reaches the ovule. This could be due to its purpose being fulfilled once the pollen tube reaches the ovule.
* Fusion with Sperm Nuclei: In some species, the tube nucleus might fuse with one or both of the sperm nuclei. However, this is not a universally accepted theory.
* Remains Active: There's evidence suggesting the tube nucleus might remain active within the pollen tube even after fertilization. Its role in this later stage is still unclear but might involve interactions with the female gametophyte.
In summary: The exact fate of the tube nucleus is still under investigation. While its role in pollen tube growth is well established, its fate after reaching the ovule varies depending on the plant species. More research is needed to fully understand its role and fate in the fertilization process.
