In this article we will discuss about: Plant Body of Ulothrix 3. The genus Ulothrix Cr. Most of them are found in fresh water of tanks, ponds, lakes etc. The common fresh water species are U.
Some grow in saline water marine such as U.
They prefer to grow in cold water and are available from rainy season to spring. They disappear during summer months. The thallus of Ulothrix is filamentous, long, unbranched and multicellular, where the cells are arranged in a single row Ulothrix asexual reproduction regeneration. The filaments are bright green in colour and remain attached at one end with the substratum such as stones, rocks or some other solid objects.
The cell is hyaline or brownish in colour, which performs the function of fixation to the substratum and called holdfast or rhizoidal cell. All the cells in-between basal and apical cells are alike. The cells may be quadrangular e. All the cells except the basal holdfast can divide and their wall is composed of outer pectin and inner cellulose Fig.
Inner to the cell wall is the cell membrane. The cell membrane encloses the protoplast. It consists of cytoplasm, chloroplast and nucleus. The cytoplasm forms a lining Ulothrix asexual reproduction regeneration or primordial utricle adjacent to the cell membrane. The central region is occupied by the vacuole, which contains cell sap.
In the peripheral region of the cytoplasm near the cell wall, single girdle or band-shaped chloroplast is present. Other type of chioroplasts are c-shaped, collar-shaped or ring-shaped. The chloroplast contains one U. Zygote on germination produces 4 or more zoospores those on germination produce new filaments. In this process the filament breaks up into a number of parts.
Each part is capable of developing a new plant like its parent.