Biology:Picocystis
| Picocystis | |
|---|---|
| |
| Picocystis salinarum | |
Scientific classification 
| |
| (unranked): | Viridiplantae |
| Division: | Chlorophyta |
| Class: | Picocystophyceae Eikrem & Lopes dos Santos |
| Order: | Picocystales Eikrem & Lopes dos Santos |
| Family: | Picocystaceae Eikrem & Lopes dos Santos |
| Genus: | Picocystis R.A.Lewin 2001 emend. Eikrem & Lopes dos Santos 2017 |
| Species: | P. salinarum
|
| Binomial name | |
| Picocystis salinarum R.A.Lewin 2001
| |
Picocystis is a monotypic genus of green algae, the sole species is Picocystis salinarum.[1] It is placed within its own class, Picocystophyceae in the division Chlorophyta.[2]
Structure
Picocystis salinarum cells under normal conditions have a spherical or oval shape. Their size ranges from 2 to 3μm (micrometer, 10^-6) in diameter. Under conditions of nutrient depletion they appear to form a trillobe shape. This trillobe shape gives it the nickname Mickey Mouse, due to its appearance to the famous character's head. The general appearance resembles that of a standard green algae.
The pigments are composed mainly from chlorophyll a and b and the carotenoids violaxanthin, alloxanthin, monadoxanthin, neoxanthin, lutein, diatoxanthin and zeaxanthin.[3][4]
The cell wall is mainly composed of polymers of the monosaccharide arabinose, polyarabinose.[3]
Habitat
The species have been found in saline or hypersaline alkaline environments.[5][6]
References
- ↑ Guiry, M.D.; Guiry, G.M. (2008). "Picocystis". AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org/browse/taxonomy/?id=46018.
- ↑ "Chloropicophyceae, a new class of picophytoplanktonic prasinophytes". Scientific Reports 7 (1): 14019. October 2017. doi:10.1038/s41598-017-12412-5. PMID 29070840. Bibcode: 2017NatSR...714019L.
- ↑ 3.0 3.1 "Picocystis salinarum gen. et sp nov (Chlorophyta) - a new picoplanktonic green alga.". Phycologia 39 (6): 560–565. 2000. doi:10.2216/i0031-8884-39-6-560.1. http://scrippsscholars.ucsd.edu/rgoericke/content/picocystis-salinarum-gen-et-sp-nov-chlorophyta-new-picoplanktonic-green-alga.
- ↑ "Photosynthetic pigments of oceanic Chlorophyta belonging to prasinophytes clade VII". Journal of Phycology 52 (1): 148–55. February 2016. doi:10.1111/jpy.12376. PMID 26987097.
- ↑ "Picocystis salinarum (Chlorophyta) in saline lakes and hot springs of East Africa" (in en). Phycologia 51 (1): 22–32. January 2012. doi:10.2216/11-28.1. http://ir-library.ku.ac.ke/handle/123456789/7819.
- ↑ "Metabolic Capability and Phylogenetic Diversity of Mono Lake during a Bloom of the Eukaryotic Phototroph Picocystis sp. Strain ML". Applied and Environmental Microbiology 84 (21). November 2018. doi:10.1128/AEM.01171-18. PMID 30120120.
Wikidata ☰ Q7191039 entry
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