Prothallium | Ferns, Gametophyte, Sporophyte | Britannica
Prothallium, the small, green, heart-shaped structure (gametophyte) of a fern that produces both male and female sex cells (gametes). The prothallium forms from a spore. After fertilization, a young sporophyte plant develops; it consists of a primary …
Prothallus - Wikipedia
A prothallus, or prothallium, (from Latin pro = forwards and Greek θαλλος (thallos) = twig) is usually the gametophyte stage in the life of a fern or other pteridophyte. Occasionally the term is also used to describe the young gametophyte of a liverwort or peat moss as well. In lichens it refers to the region of the thallus that is free of algae.
prothallium - 百度百科
prothallium，英语单词，主要用作为名词，译为“ [植] 原叶体”，用作名词译为“原叶体”。 prothallus /prəʊˈθælɪəm/ (also prothallium) N the small flat free-living gametophyte that bears the …
Ferns - Native Plants PNW
Ferns produce spores on the undersides of their fronds, which after they are released and fall to an amenable substrate, will grow into moss-like plants (prothallia). These haploid gametophytes are free-living organisms. They in turn produce gametes (sperm and eggs). A mobile, flagellate sperm seeks out an egg to fertilize.
Molecular Expressions: Science, Optics & You - Olympus MIC-D ...
View a high magnification image of the fern prothallium. The sexual form, called the gametophyte or prothallium, is a tiny kidney-shaped haploid (N) plant that is difficult to find in the wild. The asexual form, or sporophyte, is represented by the commonly known and cultivated fern plant, and is …
Spore culture, proliferation and plant regeneration of
2024年6月13日 · This study established an in vitro protocols for spore germination, leading to filament formation and development of prothallia, and finally development of sporophytes following fertilization. The prothallia could be proliferated by 8.7 time within 30 days.
Natural Perspective: Ferns (Filicinophyta)
2015年5月4日 · The gametophyte generation of ferns are small, heart-shaped, plants called prothallia (singular: prothallium). They are less than an inch (1 - 2 cm) in diameter and look very much like thalloid liverworts or hornworts.
Prothallus - Definition, Function, Difference With Thallus
Prothallus is the gametophyte of the plant that is they are responsible for producing the gametes which are the male and female sex cells of the plants. These gametes fuse to form the zygote. The male and female gamete is fused allowing the cell to enter a diploid state, this process is known as fertilization.
Gametophyte Development and Sporophyte Regeneration of
2023年5月19日 · Prothallia carried male gametangia (Fig. 2f) and female gametangia (Fig. 2g), producing haploid sperm and eggs, respectively. The stage from filaments to fully developed prothallia required 40–50 days. Gametophytes could be multiplied in large quantities on PGR-free medium (Fig. 2h).
PROTHALLIA OF THE CYATHEACEAE ALMA G. STOKEY (WITH ONE HUNDRED AND EIGHTY-SIX FIGURES) Introduction The family Cyatheaceae is listed by CHRISTENSEN (7) as consist-ing of seven genera and 456 species. Of these, three genera and 426 species belong to the Cyatheae, one monotypic genus to the Thyrso-
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