Asteromonas

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Asteromonas
Scientific classification OOjs UI icon edit-ltr.svg
(unranked): Viridiplantae
Division: Chlorophyta
Class: Chlorophyceae
Order: Chlamydomonadales
Family: Asteromonadaceae
Genus: Asteromonas
A.Artari
Species

Asteromonas is a genus of green algae in the family Asteromonadaceae. [1] It has been described from saline, marine, and brackish environments. [2] [3] It is closely related to the genus Dunaliella , another genus common in saline waters. [4]

Asteromonas is a single-celled, motile organism. Two flagella extend from the anterior end of the cell. The cells are cone-shaped and have four to eight longitudinal projections, or ribs; When viewed from the pole they are therefore shaped like a four- to eight-pointed star. Cells lack cell walls but a periplast is present, made of crystalline glycoprotein. [3] Contractile vacuoles are absent. Cells are uninucleate and have a single chloroplast filling the cell, sometimes with a pyrenoid, and one stigma. [2]

Species of Asteromonas are distinguished from each other by the shape of the cells. [4] The genus Stephanoptera is closely related and sometimes considered synonymous with Asteromonas. [5]

Asteromonas reproduces via both asexual and sexual reproduction. Asexual reproduction occurs by longitudinal division, and sexual reproduction occurs via hologamy, where the gametes are similar in size and shape to the vegetative cells. [2]

Related Research Articles

<span class="mw-page-title-main">Chlorophyceae</span> Class of green algae

The Chlorophyceae are one of the classes of green algae, distinguished mainly on the basis of ultrastructural morphology. They are usually green due to the dominance of pigments chlorophyll a and chlorophyll b. The chloroplast may be discoid, plate-like, reticulate, cup-shaped, spiral- or ribbon-shaped in different species. Most of the members have one or more storage bodies called pyrenoids located in the chloroplast. Pyrenoids contain protein besides starch. Some green algae may store food in the form of oil droplets. They usually have a cell wall made up of an inner layer of cellulose and outer layer of pectose.

<i>Chlamydomonas</i> Genus of algae

Chlamydomonas is a genus of green algae consisting of about 150 species of unicellular flagellates, found in stagnant water and on damp soil, in freshwater, seawater, and even in snow as "snow algae". Chlamydomonas is used as a model organism for molecular biology, especially studies of flagellar motility and chloroplast dynamics, biogenesis, and genetics. One of the many striking features of Chlamydomonas is that it contains ion channels (channelrhodopsins) that are directly activated by light. Some regulatory systems of Chlamydomonas are more complex than their homologs in Gymnosperms, with evolutionarily related regulatory proteins being larger and containing additional domains.

<span class="mw-page-title-main">Characiochloridaceae</span> Family of algae

Characiochloridaceae is a family of green algae in the order Chlamydomonadales.

<span class="mw-page-title-main">Chlamydomonadaceae</span> Family of algae

Chlamydomonadaceae is a family of algae within the order Chlamydomonadales. Traditionally, it has been defined as containing single-celled flagellates with a cell wall.

Atractomorpha is a genus in the Sphaeropleaceae, a family of green algae. The genus name is derived from Greek and means "spindle-shaped" or "arrow-shaped", and refers to the shape of the cells.

<i>Brachiomonas</i> Genus of algae

Brachiomonas is a genus of thalloid biflagellate green algae. These algae generally are found in marine or brackish waters, but can tolerate wide range of salinities. They may occur in freshwater pools near the sea and, occasionally, in polluted inland freshwater habitats.

<i>Carteria</i> Genus of algae

Carteria is a genus of green algae in the family Chlamydomonadaceae. Carteria are similar in morphology to the common genus Chlamydomonas and differ by having four, rather than two, flagella at the vegetative stage.

Characiochloris is a genus of green algae in the family Characiochloridaceae. Characiochloris is epiphytic on freshwater algae, or found in soil.

<i>Characium</i> Genus of algae

Characium is a genus of green algae in the family Characiaceae. It is very commonly found in freshwater habitats, where it is attached to phytoplankton or zooplankton.

<i>Chlamydopodium</i> Genus of algae

Chlamydopodium is a genus of green algae in the family Characiochloridaceae. It has been recorded from soil or attached to algae or zooplankton.

<i>Chloromonas</i> Genus of algae

Chloromonas is a genus of green algae in the family Chlamydomonadaceae. It is closely related to the model green algae, Chlamydomonas, and traditionally has been distinguished mainly through the absence of a pyrenoid.

Coelastropsis is a genus of green algae in the family Scenedesmaceae, containing the single species Coelastropsis costata. It is found in freshwater lakes and bogs, usually associated with mosses and filamentous algae. It has been recorded in Europe, Cuba and possibly New Zealand.

<i>Platydorina</i> Genus of algae

Platydorina is a genus of microscopic green algae in the family Volvocaceae. It contains only one species, Platydorina caudata. It was described by Charles Atwood Kofoid in 1899.

<i>Sorastrum</i> Genus of algae

Sorastrum is a genus of green algae in the family Hydrodictyaceae. It is a component of the phytoplankton of freshwater ponds, lakes, and ditches. Sorastrum is common in tropical to temperate regions of the world, but due to its small size it is often overlooked.

<i>Sphaeroplea</i> Genus of algae

Sphaeroplea is a genus of green algae in the family Sphaeropleaceae. It was first circumscribed by the Swedish botanist Carl Adolph Agardh in 1824.

<i>Stephanosphaera</i> Genus of algae

Stephanosphaera is a genus of green algae in the family Haematococcaceae, containing the single species Stephanosphaera pluvialis. It forms colonies of flagellated cells. Although it was once placed in the family Volvocaceae, it is not closely related to them; its sister is the unicellular genus Balticola.

Treubaria is a genus of green algae, the sole genus in the family Treubariaceae. Treubaria is found in freshwater habitats and has a cosmopolitan distribution.

Vitreochlamys is a genus of green algae in the family Chlamydomonadaceae. It is sometimes known by the name Sphaerellopsis, published by Aleksandr Arkadievich Korshikov. However, that name is an illegitimate later homonym, preceded by SphaerellopsisM.C.Cooke. It is commonly found in freshwater habitats.

Spinoclosterium is a genus of green algae, specifically of the Closteriaceae. It is rare, but widely distributed in freshwater regions throughout the world.

Actinochloridaceae is a family of green algae, in the order Chlamydomonadales.

References

  1. ↑ See the NCBI webpage on Asteromonas. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information . Retrieved 2007-03-19.
  2. 1 2 3 Nakada, Takashi; Nozaki, Hisayoshi (2014). "Chapter 6. Flagellate Green Algae". In Wehr, John D.; Sheath, Robert G.; Kociolek, J. Patrick (eds.). Freshwater Algae of North America: Ecology and Classification (2 ed.). Elsevier Inc. ISBN   978-0-12-385876-4.
  3. 1 2 Guiry, M.D.; Guiry, G.M. "Asteromonas". AlgaeBase . World-wide electronic publication, National University of Ireland, Galway. Retrieved 2023-12-18.
  4. 1 2 Ettl, H. (1983). Ettl, H.; Gerloff, J.; Heynig, H.; Mollenhauer, D. (eds.). Chlorophyta. 1. Teil / Part 1: Phytomonadina. Süßwasserflora von Mitteleuropa. Vol. 9. VEB Gustav Fischer Verlag. pp. XIV + 808. ISBN   978-3-8274-2659-8.
  5. ↑ Iyengar, M. O. P.; Desikachary, T. V. (1981). Volvocales. New Delhi: Indian Council of Agricultural Research. p. 532.


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