What is the function of germ por?a)Emergence of radicle.b)Absorption o...
Understanding Germ Pore Function
The germ pore is a critical structure in the reproductive biology of plants, particularly in the context of pollen and fertilization. It serves specific functions that are essential for successful reproduction.
What is a Germ Pore?
- The germ pore is a specialized opening in the pollen grain.
- It allows for the emergence of the pollen tube, which is crucial for fertilization.
Role in Pollen Tube Initiation
- The primary function of the germ pore is to facilitate the initiation of the pollen tube.
- When pollen lands on the stigma of a compatible flower, it absorbs moisture and nutrients, activating the germ pore.
Process of Pollen Tube Growth
- Upon activation, the pollen tube begins to grow through the germ pore.
- This tube travels down the style to reach the ovule, where fertilization occurs.
Why Other Options are Incorrect
- Emergence of Radicle (a): This refers to seed germination, not directly related to the germ pore.
- Absorption of Water for Seed Germination (b): This process occurs in seeds, not pollen grains.
- All of These (d): Since the germ pore specifically pertains to pollen tube initiation, the inclusion of other functions makes this option incorrect.
In summary, the germ pore is vital for the initiation of the pollen tube, which is essential for the fertilization process in flowering plants. This specificity is why option 'C' is the correct answer.
What is the function of germ por?a)Emergence of radicle.b)Absorption o...
One or more thin areas present in the exine of pollen grains are known as germ pores. The germ pores are apertures in the exine layer of the pollen grain where the sporopollenin is absent. The germ pore helps in the formation of the pollen tube and the release of the male gametes during fertilisation. There are usually three germ pores in dicots (tricolpate) and one in monocots (monocolpate).