(a) Unicellular Amoeboid Forms or Rhizopodial Forms: These algae lack flagella, the organs of motion, but are able to perform amoeboid movement by means of cytoplasmic growth e.g., Chrysamoeba (Fig. 1). (b) Unicellular Motile (Flagelloid) Forms: The unicellular motile forms are the simplest type of thallus . Thallus, plant body of algae, fungi, and other lower organisms formerly assigned to the obsolete group Thallophyta. A thallus is composed of filaments or plates of cells and ranges in size from a unicellular structure to a complex treelike form. It has a simple structure that lacks specialized.
Fungus - Fungus - Structure of the thallus: In almost all fungi the hyphae that make up the thallus have cell walls. (The thalli of the true slime molds lack cell walls and, for this and other reasons, are classified as protists rather than fungi.) A hypha is a multibranched tubular cell filled with cytoplasm. The tube itself may be either continuous throughout or divided into compartments, or. Lichen thallus types The ‘vegetative’ part of the lichen is the thallus, and this can develop into a morphologically diverse range of structures: multiply branched tufts, flat, leaf-like structures, filamentous structures, aggregations of tiny plates, thin crusts, layers of powdery granules, or hardly any visible thallus .
Thallus definition, a simple vegetative body undifferentiated into true leaves, stem, and root, ranging from an aggregation of filaments to a complex plantlike form. See more. Thallus Format- Unicellular, Colonial, Filamentous, and Multicellular Photosynthetic Pigments-chlorophylls a and b (accessory pigments) Food storage- starch -cell wall composed of cellulose but unicellular forms are made of chitin-a few live in symbiotic relationships with other organisms or as part of organisms called lichens-eg. Ulva and Spirogyra.