The word "micropyle" (maɪkrəpaɪl) refers to a small opening in the integument of an ovule where the pollen enters. The pronunciation of the word is often mistaken as "micro pile," which means a small heap of something. The correct spelling is "micropyle," with the stress on the second syllable. The word's root, "micro," means small, and "pyle" comes from the Greek word for gate, so "micropyle" is essentially a small gate that allows fertilization to occur in plants.
The term "micropyle" refers to a small opening found in the outer covering of the seed coat in plants. More specifically, it is a minute aperture located at the apex of the ovule, where the integuments are fused and form a passage to the embryo sac. The micropyle facilitates the entry of pollen during fertilization and allows for the passage of water into the ovule.
The size and shape of the micropyle can vary among different plant species, but its primary function remains consistent. It serves as a crucial point for the sperm to enter the ovule and reach the female gametophyte, where fertilization occurs. The micropyle acts as a gateway through which the male gametes reach the egg cell, enabling sexual reproduction in plants.
Furthermore, the micropyle also plays a vital role in facilitating water absorption by the ovule. This is particularly important during the process of seed germination, as water intake through the micropyle helps initiate the biochemical processes required for the development of the embryo. Additionally, the micropyle may provide a pathway for the entrance of air and gases necessary for respiration.
In conclusion, the micropyle is a tiny opening located at the apex of the ovule, allowing for the entry of pollen during fertilization and enabling water absorption for seed germination. It serves as an essential component in the reproductive process of plants, facilitating sexual reproduction and ensuring the successful development of the embryo.
1. The mark on an ovum at its previous point of attachment to the ovary. 2. One of the pores in the ova of certain vertebrates through which the male element may gain entrance.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
In bot., the opening or foramen of the ripened seed for the escape of the root of the embryo.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "micropyle" comes from the Greek words "mikros", meaning small, and "pȳlē", meaning gate or entrance. The term was first coined in the mid-19th century to describe the small opening or pore found in the integument (outer covering) of an ovule in plants. The micropyle serves as a pathway for the entry of the pollen tube during fertilization.