NUCELLUS Meaning and
Definition
-
The nucellus is a vital part of the ovule of a seed plant, particularly within angiosperms. It is a highly specialized tissue that constitutes the central region of the ovule. Functionally, the nucellus develops into the megagametophyte, which eventually gives rise to the female gametophyte or embryo sac. The nucellus plays a crucial role in the reproductive process of seed plants.
Anatomically, the nucellus is usually located within the ovule's integuments. It is composed of various types of cells, which include the nucellar cells, the archesporial cells, and the middle region cells. The nucellar cells are believed to be the primary source of nutrients for the developing embryo sac. They provide nourishment and support for the growth and development of the female gametophyte.
The nucellus also contains the megasporangium or ovule primordium, which houses the megaspore mother cell. Within the megasporangium, the megaspore mother cell undergoes meiosis to produce four haploid megaspores. These megaspores give rise to the female gametophyte.
In some plant species, the nucellus may persist and remain present even after fertilization, thus contributing to the formation of the seed coat. However, in other species, the nucellus degenerates or disintegrates as the embryo develops within the ovule.
In summary, the nucellus is a crucial component of the ovule in seed plants, serving as the site for the development of the female gametophyte. Its cells provide essential nutrients and support for the growth of the embryo sac, contributing to successful fertil
-
In botany, the nucleus of the ovule.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for NUCELLUS
- bucellus
- mucellus
- jucellus
- hucellus
- nycellus
- nhcellus
- njcellus
- nicellus
- n8cellus
- n7cellus
- nuxellus
- nuvellus
- nufellus
- nudellus
- nucwllus
- nucsllus
- nucdllus
- nucrllus
- nuc4llus
Etymology of NUCELLUS
The word "nucellus" has its etymology derived from Latin. It comes from the Latin word "nucella", which means "little nut". In botany, the nucellus is the central part within the ovule of a flowering plant, where the actual embryo sac or female gametophyte is located. The term "nucellus" was first used in this context by early botanists who associated the structure with the shape and appearance of a small nut.
Similar spelling word for NUCELLUS
Infographic
Add the infographic to your website:
