Aphanizomenon ovalisporum

Aphanizomenon ovalisporum is a filamentous cyanobacteria present in many algal blooms.

Aphanizomenon ovalisporum
Scientific classification
Domain: Bacteria
Phylum: Cyanobacteria
Class: Cyanophyceae
Order: Nostocales
Family: Aphanizomenonaceae
Genus: Aphanizomenon
Species:
A. ovalisporum
Binomial name
Aphanizomenon ovalisporum
Forti, 1912

Morphology

Aphanizomenon ovalisporum is a filamentous gram negative bacterium of the genus Aphanizomenon. The bacterial filaments are unbranched trichomes. The cells are approximately 5 um in diameter, and are motile through gliding. This species produces two differentiated cells, heterocysts, and akinetes.[1][2][3]

Metabolism

Aphanizomenon ovalisporum uses oxygenic photosynthesis, like other cyanobacteria.[1] The heterocyst cells of this species can fix nitrogen into ammonium.

Genome

The genome of Aphanizomenon ovalisporum is approximately 7.47 Mbp in size, with a GC content of 50.39%. There are 2851 coding sequences. The strain analyzed was isolated in Madrid, Spain.[4]

Environment

The species was first described during an algal bloom in Lake Kinneret, Israel, 1994. However, other isolates have been obtained from countries around Europe, such as Spain. The most recent samples were taken from a man-made lake in Madrid. This cyanobacterial species can rapidly change its environment during algal blooms, in which it produces toxins such as cylindrospermopsin, which can cause headaches, vomiting and other symptoms in humans, as well as leading to the deoxygenation of the local water.[5][6]

References
  1. Sukenik, Assaf; Beardall, John; Hadas, Ora (2007). "Photosynthetic Characterization of Developing and Mature Akinetes Ofaphanizomenon Ovalisporum(Cyanoprokaryota)1". Journal of Phycology. 43 (4): 780–788. doi:10.1111/j.1529-8817.2007.00374.x. S2CID 85200692.
  2. Sukenik, Assaf; Kaplan-Levy, Ruth N.; Viner-Mozzini, Yehudit; Quesada, Antonio; Hadas, Ora (2013). "Potassium deficiency triggers the development of dormant cells (Akinetes) in Aphanizomenon ovalisporum (Nostocales, Cyanoprokaryota)1". Journal of Phycology. 49 (3): 580–587. doi:10.1111/jpy.12069. PMID 27007046. S2CID 26430378.
  3. Sukenik, Assaf; Hadas, Ora; Stojkovic, Slobodanka; Malinsky-Rushansky, Nehama; Viner-Motzini, Yehudit; Beardall, John (2009). "Fluorescence microscopy reveals variations in cellular composition during formation of akinetes in the cyanobacterium Aphanizomenon ovalisporum". European Journal of Phycology. 44 (3): 309–317. doi:10.1080/09670260802585786. S2CID 84969774.
  4. Sanz-Alférez, Soledad; Rodríguez-Sanz, Carolina E.; Barón-Sola, Ángel; del Campo, Francisca F. (2018). "Whole-Genome Sequence of Toxic Freshwater Cyanobacterium Chrysosporum ovalisporum Strain UAM-MAO". Microbiology Resource Announcements. 7 (14): e00819–18. doi:10.1128/MRA.00819-18. PMC 6256650. PMID 30533719.
  5. US EPA, OW (2018-08-16). "Health Effects from Cyanotoxins". www.epa.gov. Retrieved 2021-10-11.
  6. Quesada, Antonio; Moreno, Enrique; Carrasco, David; Paniagua, Thamar; Wormer, Lars; Hoyos, Caridad de; Sukenik, Assaf (2006). "Toxicity of Aphanizomenon ovalisporum(Cyanobacteria) in a Spanish water reservoir". European Journal of Phycology. 41: 39–45. doi:10.1080/09670260500480926. S2CID 84682172.


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