What is trichothallic?
What is trichothallic?
Definition of trichothallic : having a filamentous thallus or one ending in hairs or hairlike branches —used especially of an alga that grows by the action of an intercalary meristem.
What trichothallic growth?
Trichothallic growth is growth in which cell division is restricted to the base of one or several filaments. This method of growth is exhibited in members of the genus Desmarestia, including both D. ligulata and D. viridis.
Where trichothallic growth found?
trichothallic growth Growth that occurs only in particular, well-defined regions, e.g. at or near the base of the filament in certain brown algae (Phaeophyta).
What is the meaning of Heterotrichous?
Definition of heterotrichous : having the thallus differentiated into a prostrate portion and an upright or projecting system many algae are heterotrichous.
What is clump formation in algae?
The active male gametes cluster around female gamete and cling themselves by their anterior flagellum. It is known as clump formation. In this clump formation (Fig. 4B) one male gamete is able to fuse with female gamete. The gametes fuse to form a diploid zygote.
What are Siphonaceous algae?
siphonaceous (siphoneous) Applied to algae in which the thallus is not divided up by septa, i.e. the many nuclei are not compartmentalized into cells. The typical siphónaceous alga has a large central vacuole surrounded by a layer of protoplasm, containing nuclei and chloroplasts, which lines the cell wall.
What is meant by Pseudoparenchymatous?
pseudoparenchyma A tissue that superficially resembles plant parenchyma but is made up of an interwoven mass of hyphae (in fungi) or filaments (in algae). Examples of pseudoparenchymatous structures are the fruiting bodies (mushrooms, toadstools, etc.) of certain fungi and the thalli of certain red and brown algae.
What is clump formation?
Clump formation occurs with lead shot due to the escape of hot powder gases passed the intermediate material into the shot load. The instant great heat effect on the shot load causes a welding of the shot pellets, increasing the hazardous area and impairs the patterning.
What is unilocular and Plurilocular Sporangia?
Unilocular Sporangia vs Plurilocular Sporangia Unilocular sporangia consist of a single enlarged cell which results in the formation of haploid spores. Plurilocular sporangia consist of many cuboidal shaped cells which give rise to many diploid zoospores.
What are Parenchymatous algae?
These algae are mostly macroscopic with undifferentiated cells and originate from a meristem with cell division in three dimensions. In the case of parenchymatous algae, cells of the primary filament divide in all directions and any essential filamentous structure is lost.
What is Palmelloid stage?
palmelloid Applied to an algal colony composed of an indefinite number of non-motile cells embedded in a gelatinous or mucilaginous matrix. It may occur as a non-motile phase in a normally motile species.
