POLAR NUCLEI Meaning and
Definition
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Polar nuclei refers to the two haploid nuclei that are present in the central cell of the female gametophyte in angiosperms. These nuclei are essential for the process of double fertilization, which is a unique reproductive mechanism in flowering plants.
In the ovule, the central cell is located within the embryo sac and contains a large central vacuole and two polar nuclei. The polar nuclei are derived from the megaspore that undergoes mitotic divisions to form the female gametophyte.
During double fertilization, one of the male gametes fuses with the egg cell to form the zygote, which develops into the embryo, while the other male gamete fuses with the two polar nuclei to form the endosperm. The endosperm is a triploid tissue that provides nutrients to the developing embryo.
The fusion of the male gamete with the polar nuclei is called triple fusion and is a crucial step in the reproduction of flowering plants. The polar nuclei combine with the male gamete to initiate cellular divisions and form the endosperm, which later undergoes further development to provide nourishment to the developing embryo.
Overall, polar nuclei are the two haploid nuclei present in the central cell of the female gametophyte, essential for the process of double fertilization, and play a significant role in the formation of endosperm in angiosperms.
Common Misspellings for POLAR NUCLEI
- oolar nuclei
- lolar nuclei
- -olar nuclei
- 0olar nuclei
- pilar nuclei
- pklar nuclei
- pllar nuclei
- pplar nuclei
- p0lar nuclei
- p9lar nuclei
- pokar nuclei
- popar nuclei
- pooar nuclei
- polzr nuclei
- polsr nuclei
- polwr nuclei
- polqr nuclei
- polae nuclei
- polad nuclei
- polaf nuclei
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