Gametophyte - Wikipedia
The egg-producing gametophyte is known as a megagametophyte, because it is typically larger, and the sperm producing gametophyte is known as a microgametophyte. Species which produce egg and sperm on separate gametophytes plants are termed dioicous, while those that produce both eggs and sperm on the same gametophyte are termed monoicous.
Megagametophyte | plant anatomy | Britannica
In the gametophyte phase, which is haploid (having a single set of chromosomes), male and female organs (gametangia) develop and produce eggs and sperm (gametes) through simple mitosis for sexual reproduction.
Megagametogenesis - Wikipedia
Megagametogenesis is the process of maturation of the female gametophyte, or megagametophyte, in plants. [1] During the process of megagametogenesis, the megaspore, which arises from megasporogenesis, develops into the embryonic sac, in which the female gamete is housed. [ 2 ]
Ovule - Wikipedia
In seed plants, the ovule is the structure that gives rise to and contains the female reproductive cells. It consists of three parts: the integument, forming its outer layer, the nucellus (or remnant of the megasporangium), and the female gametophyte (formed from a haploid megaspore) in …
2.6.3.2: Angiosperm Life Cycle - Biology LibreTexts
Angiosperms have a complex life cycle. The microgametophyte is reduced to 2 cells, while the megagametophyte is now 7 cells and 8 nuclei. Ovules develop within the ovary or ovaries of the gynoecium. …
Megagametophyte: - an overview | ScienceDirect Topics
From the remaining functional megaspore, the megagametophyte (also known as female gametophyte or embryo sac) develops by three mitotic divisions, at the mature stage consisting of 8 nuclei and 7 cells (one egg cell, two synergids, one central cell and three antipodals).
The Female Gametophyte - PMC
The female gametophyte is also commonly called the embryo sac or megagametophyte. The male gametophyte, also called the pollen grain or microgametophyte, develops within the anther and consists of two sperm cells encased within a vegetative cell ( Gifford and Foster, 1989 ).
What is a megagametophyte? - BYJU'S
Megagametophyte: In the ovule, the surviving megaspore undergoes three mitotic divisions to produce a seven-celled eight nuclei as a female gametophyte called an embryo sac. One of these cells is an egg cell.
One tissue, two fates: different roles of megagametophyte cells …
In the present study, it is shown that a major part of the Scots pine megagametophyte cells stay alive and the megagametophyte is viable and metabolically active tissue from the early phases of embryo development until the imbibition phases of mature seeds.
The Maize Megagametophyte - SpringerLink
The megagametophyte of maize follows the Polygonum-type pattern of development: one of the four meiotic products, the functional megaspore, undergoes three free nuclear divisions to produce a polarized, eight-nucleate syncytium. Cellularization produces seven cells that differentiate into four cell types: two synergids, three antipodals, and ...