What type of life cycle is found in Coleochaete?
What type of life cycle is found in Coleochaete?
What type of life cycle is found in Coleochaete?
The life cycle of Coleochaete is haplontic type (Fig. 5, 6). The thallus is haploid and represents the gametophytic generation. It produces antheridia and oogonia on erect branches.
What is Coleochaete Spermocarp?
Definition of spermocarp : the oogonium together with the ensheathing cells that develop from underlying cells of the parent thallus after fertilization in various algae (such as those of the genera Chara and Coleochaete)
Is Coleochaete a green algae?
Moreover, Coleochaete is the only living green alga in which some species possess zygotes (FIG. 6.33) that are retained on the maternal plant and corticated by a layer of sterile gametophytic cells (Graham, 1984; McCourt et al., 2004).
What phylum is Coleochaete?
phylum Charophyta
Coleochaete
| Rank | Name | Author |
|---|---|---|
| phylum | Charophyta | Migula 1890 |
| class | Charophyceae | Smith 1938 |
| order | Coleochaetales | |
| family | Coleochaetaceae |
Is Coleochaete unicellular or multicellular?
multicellular
Coleochaete is a genus of parenchymatous charophyte green algae in the order Coleochaetales. They are haploid, reproduce both sexually and asexually, and have true multicellular organisation, with plasmodesmata communicating between adjacent cells.
How do Volvox colonies form?
Volvox reproduces asexually through the formation of autocolonies. Special gonidium cells divide to form daughter colonies that are small versions of the parents but with the flagella facing inwards.
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 the shape of Coleochaete?
They are haploid, reproduce both sexually and asexually, and have true multicellular organisation, with plasmodesmata communicating between adjacent cells. The plants form flat, sprawling discs on solid surfaces in freshwater streams worldwide, usually as epiphytes on aquatic plants or growing on the surface of stones.
Which type of thallus is found in Coleochaete?
In C. scutata, the first division is transverse . and forms two cells. The upper cell forms seta and the lower one divides repeatedly to form discoid thallus.
Is Coleochaete unicellular?
Coleochaete is a genus of parenchymatous charophyte green algae in the order Coleochaetales. They are haploid, reproduce both sexually and asexually, and have true multicellular organisation, with plasmodesmata communicating between adjacent cells.
How does the Volvox reproduce?
How does Coleochaete reproduce?
Coleochaete reproduces both asexually and sexually. Asexual reproduction takes place by means of large, ovoid, biflagellate zoospores which are formed singly within an ordinary cell. Each zoospore is often provided with a chloroplast. The zoospore escapes through a circular opening, formed at the apex of a short papilla developed on the cell wall.
What is the vegetative body of Coleochaete?
In this article we will discuss about the vegetative body and reproduction of coleochaete. The thalli exhibit diverse forms. In some cases, they are typically heterotrichous with numerous projecting filaments combined to form a more or less hemispherical cushion, which is surrounded by mucilage.
How many species are there in the genus Coleochaete?
The genus Coleochaete is the only representative of the family Coleochaetaceae. It is represented by about ten species of which three species—C. orbicularis, C. nitellarum and C. scutata are common in India.
Is Coleochaete haploid or asexual?
Coleochaete. They are haploid, reproduce both sexually and asexually, and have true multicellular organisation, with plasmodesmata communicating between adjacent cells. The plants form flat, sprawling discs on solid surfaces in freshwater streams worldwide, usually as epiphytes on aquatic plants or growing on the surface of stones.