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A thallus usually names the entire body of a multicellular non-moving organism in which there is no organization of the tissues into organs.[1] Even though thalli do not have organized and distinct parts (leaves, roots, and stems) as do the vascular plants, they may have analogous structures that resemble their vascular “equivalents”. The analogous structures have similar function or macroscopic structure, but different microscopic structure; for example, no thallus has vascular tissue.
Although a thallus is largely undifferentiated in terms of its anatomy, there can be visible differences and functional differences. A kelp, for example, may have its thallus divided into three regions. The parts of a kelp thallus include the holdfast (anchor), stipe (supports the blades) and the blades (for photosynthesis).
What is the Importance of Thallus?
Thallus is an important part of a lichen. It is a photosynthetic structure that is attached to the lower surface of the fungus.
Structural Description of Thallus
A thallus is a structural unit of a green alga or a plant that lacks true roots, stems, and leaves. The thallus is the flattened, photosynthetic body of the alga or plant.
Evolution of Thallus
A thallus is a simple, flattened, green plant body that lacks roots, leaves, and vascular tissue. It is the primary body form of all non-vascular plants, such as mosses, liverworts, and hornworts.
Arrangement of Filamentous Lower Fungi
The ascomycetes are a group of fungi that produce spores in a sac-like structure called an ascus. The basidiomycetes are a group of fungi that produce spores on a club-shaped structure called a basidium. Thallus – Meaning Importance.
