Position of Polar Nuclei in Relation to Egg Apparatus

The polar nuclei in plants are located in close proximity to the egg apparatus. However, their exact position in relation to the egg apparatus can vary depending on the plant species.

Below or Above Egg Apparatus

In some plant species, the polar nuclei are located below the egg apparatus. This is the case in angiosperms, where the polar nuclei are found in the central cell of the female gametophyte, which is located below the egg cell. In these plants, the polar nuclei fuse with the sperm nuclei to form the endosperm, which provides nutrients to the developing embryo.

In other plant species, such as gymnosperms, the polar nuclei are located above the egg apparatus. In these plants, the polar nuclei are found in the same cell as the egg cell, which is located at the top of the female gametophyte. When fertilization occurs, the polar nuclei and sperm nuclei fuse to form the primary endosperm nucleus, which also provides nutrients to the developing embryo.

Conclusion

In conclusion, the position of the polar nuclei in relation to the egg apparatus can vary in different plant species. In angiosperms, the polar nuclei are located below the egg apparatus, while in gymnosperms, they are located above it. The location of the polar nuclei is important for the formation of the endosperm, which provides nutrients to the developing embryo.

It's below the egg apparatus and it is written in ncert page no. 27 and line- 12 &13 from top of the page