Archegonium | Female Gametophyte, Embryo Sac, Antipodal Cells …
archegonium, the female reproductive organ in ferns and mosses. An archegonium also occurs in some gymnosperms, e.g., cycads and conifers. A flask-shaped structure, it consists of a neck, with one or more layers of cells, and a swollen base—the venter—which contains the egg.
What is the Difference Between Antheridium and Archegonium
2019年11月18日 · The main difference between antheridium and archegonium is that antheridium is the haploid structure producing male gametes in cryptogams such as ferns and bryophytes, whereas archegonium is the multicellular structure producing female gametes in both cryptogams and gymnosperms.
Archegonium: The Female Reproductive Organ of Plants - BYJU'S
Archegonium (sing.) or archegonia (plu.) are structures borne on the gametophytes of plants that bear ovum or female gamete. The male counterpart of an archegonium is the antheridium.
Archegonium - an overview | ScienceDirect Topics
The archegonium represents one of the key evolutionary innovations for sexual reproduction in land plants. This structure expressed on female plants provides protection and nourishment for the egg and developing embryo.
16.3B: Moss Life Cycle - Biology LibreTexts
2022年5月14日 · 16.3B: Moss Life Cycle. Mosses and liverworts are traditionally classified together in the Division Bryophyta on the basis of their sharing a similar life cycle (alternation of generations), similar reproductive organs (antheridia and archegonia), and a lack of vascular tissue (xylem and phloem).
Diversity, development and evolution of archegonia in land plants
2020年10月19日 · We review the diversity and development of archegonia, the female reproductive organs of land-plant gametophytes. The archegonium is a uniquely land-plant structure, and studies of its evolution benefit from use of a comparative approach in a phylogenetic context.
Fern - Sporangia, Gametophytes, Alternation | Britannica
2024年9月19日 · Fern - Sporangia, Gametophytes, Alternation: The sex organs of ferns are the antheridium and the archegonium. Within the archegonial venter the zygote undergoes cell divisions to form the embryo, which usually has a development distinctive to ferns.
2.5.2.3: Bryophyta - Biology LibreTexts
Moss sporophytes have a complex set of structures at the top of a seta. When the sporophyte emerges, it tears off a piece of the female gametophyte's archegonium, leaving a coating called the calyptra. Mosses have a capsule, where the sporangia are housed.
Archegonium & Antheridium | Definition, Structure & Function
2023年11月21日 · The archegonia is the female reproductive structure in non-flowering plants such as mosses, ferns, hornworts, some algae, and some conifers. The archegonium contains an egg which will be...
20.5: Marchantiophyta - The Liverworts - Biology LibreTexts
The zygote will be retained within the archegonium and nourished through the placenta, an area of gametophyte tissue adjacent to the foot of the sporophyte. The mature sporophyte produces haploid spores via meiosis, which will grow into gametophytes.
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