How zoospore are formation in Chlamydomonas?
The zoospore formation takes place during favourable conditions. The protoplast contracts and gets separated from the cell wall. The parent cell loses flagella or in some species of Chlamydomonas flagella are absorbed. The contractile vacuoles and the neuro-motor apparatus disappear.
Are zoospores present in Chlamydomonas?
Zoospore formation is commonly observed in many members of algae like Chlamydomonas, Ulothrix, Cladophora, etc. and also in some members of fungi like Saprolegnia, etc.
How zoospore is formed?
A zoospore is a motile asexual spore that uses a flagellum for locomotion. Also called a swarm spore, these spores are created by some protists, bacteria, and fungi to propagate themselves.
What is the function of zoospores in Chlamydomonas?
The function of zoospores: Zoospores provide motility to the organisms. This helps them find a better environment to grow. The dispersal of flagellated spores is crucial for this alga to survive in aquatic conditions.
Where are zoospores produced?
The more primitive aquatic and terrestrial fungi tend to produce zoospores. The zoospores of aquatic fungi and funguslike organisms swim in the surrounding water by means of one or two variously located flagella (whiplike organs of locomotion).
What is conjugation How does it occur in Chlamydomonas?
conjugation, in biology, sexual process in which two lower organisms of the same species, such as bacteria, protozoans, and some algae and fungi, exchange nuclear material during a temporary union (e.g., ciliated protozoans), completely transfer one organism’s contents to the other organism (bacteria and some algae).
Which is the motile zoospores of Chlamydomonas?
Solution : Zoospores of Chlamydomonas are biflagellated, haploid and asexual spores.
Where are zoospores formed?
The more primitive aquatic and terrestrial fungi tend to produce zoospores. The zoospores of aquatic fungi and funguslike organisms swim in the surrounding water by means of one or two variously located flagella (whiplike organs of locomotion). Zoospores produced…
What are produced upon the germination of the diploid and the haploid zoospores?
The developing diploid zygospores have thick coats that protect them from desiccation and other hazards. They may remain dormant until environmental conditions become favorable. When the zygospore germinates, it undergoes meiosis and produces haploid spores, which will, in turn, grow into a new organism.
How do Chlamydomonas grow and develop?
The most widely used laboratory species is Chlamydomonas reinhardtii. Cells of this species are haploid, and can grow on a simple medium of inorganic salts, using photosynthesis to provide energy. They can also grow in total darkness if acetate is provided as an alternative carbon source.
How do Chlamydomonas get nutrients?
Chlamydomonas makes its food in the same way as green plants, but without the elaborate system of roots, stem and leaves of the higher plants. It is surrounded by water containing dissolved carbon dioxide and salts so that in the light, with the aid of its chloroplast, it can build up starch by photosynthesis.
Are zoospores unicellular?
Zoospores, as unicellular, flagellated cells, might closely represent the ancestral opisthokont phenotype (Cavalier-Smith et al., 2014).
How are zoospores formed in Chlamydomonas?
The zoospores are liberated from the parent cell or zoosporangium by gelatinization or rupture of the cell wall. The zoospores are identical to the parent cell in structure but smaller in size. The zoospores simply enlarge to become mature Chlamydomonas. Under favourable conditions the formation of zoospores can take place every 25 hours.
What is the process of zoospore formation?
The zoospore formation takes place as follows: The protoplast contracts and gets separated from the cell wall. The parent cell loses flagella or in some species of Chlamydomonas flagella are absorbed. The contractile vacuoles and the neuro-motor apparatus disappear.
What is the structure of Chlamydomonas under electron microscope?
Roberts et al (1972), Hills (1973) and Hills et al. (1973) have studied in detail the structure of Chlamydomonas under Electron Microscope (E.M.) (Fig. 3.43). The cell wall is multilayered (7 layered) and it consists of proteins.
What are the asexual and sexual methods of reproduction in Chlamydomonas?
In this article we will discuss about the asexual and sexual methods of reproduction that occur in the life cycle of chlamydomonas. 1. Asexual Reproduction: (A) By zoospores- The zoospore formation takes place during favourable conditions. The zoospore formation takes place as follows: The protoplast contracts and gets separated from the cell wall.