Sorastrum

Sorastrum
	Sorastrum spinulosum
Scientific classification
(unranked):	Viridiplantae
Division:	Chlorophyta
Class:	Chlorophyceae
Order:	Sphaeropleales
Family:	Hydrodictyaceae
Genus:	Sorastrum; Kützing
Species
	Sorastrum spinulosum; Sorastrum americanum; Sorastrum sp. UTEX LB 785;

Sorastrum is a genus of green algae in the family Hydrodictyaceae.[1] It is a component of the phytoplankton of freshwater ponds, lakes, and ditches. Sorastrum is common in tropical to temperate regions of the world,[2] but due to its small size it is often overlooked.[3]

Description

Sorastrum forms spherical colonies of 8 to 128 cells.[4] Individual cells are kidney-shaped, pear-shaped, or wedge-shaped, or spherical (in Sorastrum sphericum)[3] and attached to a central body of mucilage via gelatinous strands. On each cell there are two to four outwardly pointing spines. Each cell contains a single chloroplast with a one pyrenoid.[5]

Identification of species depends on the size and shape of the cells, particularly the spines.[2]

Reproduction

Reproduction occurs asexually, by zoospores. Zoospores have two flagella each and are formed by the repeated division of the protoplast. Once divided, the zoospores are released from a tear in the mother cell wall. Sexual reproduction has not been observed in Sorastrum, but is presumed to be similar to that of Hydrodictyon and Pediastrum.[2]

References

See the NCBI webpage on Sorastrum. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.
Guiry, M.D.; Guiry, G.M. "Sorastrum". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. Retrieved 2023-05-23.
Keshri, Jai Prakash; Mallick, Prasant (2013). "The genus Sorastrum Kützing (Hydrodictyaceae, Sphaeropleales, Chlorophyta) from India, with a new species S. philiposianum". Bangladesh Journal of Plant Taxonomy. 20 (2): 243–249. doi:10.3329/bjpt.v20i2.17399.
Bicudo, Carlos E. M.; Menezes, Mariângela (2006). Gêneros de Algas de Águas Continentais do Brasil: chave para identificação e descrições (2 ed.). RiMa Editora. p. 508. ISBN 857656064X.
Shubert, Elliot; Gärtner, Georg (2014). "Chapter 7. Nonmotile Coccoid and Colonial 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.

External links

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[1] See the NCBI webpage on Sorastrum. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.

[AlgaeBase-2] Guiry, M.D.; Guiry, G.M. "Sorastrum". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. Retrieved 2023-05-23.

[Keshri-3] Keshri, Jai Prakash; Mallick, Prasant (2013). "The genus Sorastrum Kützing (Hydrodictyaceae, Sphaeropleales, Chlorophyta) from India, with a new species S. philiposianum". Bangladesh Journal of Plant Taxonomy. 20 (2): 243–249. doi:10.3329/bjpt.v20i2.17399.

[Bicudo_and_Menezes2006-4] Bicudo, Carlos E. M.; Menezes, Mariângela (2006). Gêneros de Algas de Águas Continentais do Brasil: chave para identificação e descrições (2 ed.). RiMa Editora. p. 508. ISBN 857656064X.

[Shubert2014-5] Shubert, Elliot; Gärtner, Georg (2014). "Chapter 7. Nonmotile Coccoid and Colonial 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.