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Thallus


prothallus (prothallium)
the reduced prethallus gametophyte of plants such as ferns and their allies
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
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thallus
[Gk. thallos, a young twig]
A simple plant or algal body without true roots, leaves, or stems.
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thallus The complete body of a seaweed.
thecodonts A large assemblage of Triassic archosaurian diapsids of the order Thecodontia and characterized by having teeth set in sockets.
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thallus
The vegetative part of simple plants, ranging from unicellular structures to large seaweeds. It shows no differentiation into root, stem, and leaves.
Covered in Lab 7 Thalloid and Vascular Plant Organization ...
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Prothallus: A green, photosynthetic structure that is one cell thick, usually heart- or kidney-shaped, 3-10 mm long and 2-8 mm broad. The thallus produces gametes by means of: ...
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prothallus In ferns, a small heart-shaped bisexual gametophyte. PICTURE ...
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When seen under magnification, a section through a typical foliose lichen thallus reveals four layers of interlaced filaments (fungus).
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It germinates into a filament of cells.
This grows into a prothallus with
rhizoids, which absorb water and minerals from the soil;
archegonia, which produce a single egg (by mitosis);
antheridia, which form swimming sperm (again, by mitosis).
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