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Siphonocladus tropicus showing segregative cell division. Siphonocladus is a small genus of green algae in the family Siphonocladaceae. [1] [2] The algal body is composed of long, club-shaped cells that divide by segregative cell division, followed by the formation of branches that break through the mother cell.
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). [2] The thallus of a fungus is usually called a mycelium. The term thallus is also commonly used to refer to the vegetative body of a lichen.
Caulerpa is coenocytic, meaning it has a multinucleate thallus organization. It is also siphonous, meaning unlike other algae, the thallus and the nuclei are not separated by cell walls. They are instead one long mass of protoplasm surrounded by a single cell wall. [12]
Brown algae have many unique characteristics in terms of their metabolism and cell biology. Ergo, brown algae and in particular, E. siliculosus, are often used for explorative research. Its genome was the first brown macroalgal genome to be sequenced, with the expectation that E. siliculosus will serve as a genetic and genomic model for brown ...
Ectocarpus is a genus of filamentous brown alga that includes a model organism for the genomics of multicellularity. [1] [2] Among possible model organisms in the brown algae, Ectocarpus was selected for the relatively small size of its mature thallus and the speed with which it completes its life cycle.
The thallus, or body, of this algae is a hollow, torpedo-shaped sac. This ellipsoid shape has low drag through the water allowing the algae to inhabit areas with significant wave and current energy. [4] The sac is reddish-purple to yellowish-brown in color. It can be as long as 15 centimetres (5.9 in), but is usually shorter.
Several kelp laminae. The lamina or blade in macroscopic algae, like seaweed, is a generally flattened structure that typically forms the principal bulk of the thallus. [1] It is often developed into specialised organs such as flotation bladders and reproductive organs.
Mastophora is a genus of thalloid alga comprising four species. The dimerous, crustose thalli comprise two groups of filaments. The bulk of the thallus is made of erect filaments, which may be one or many cells long.