Chlorella is a genus of freshwater algae. They are widely used.
Chlorella species form spherical, single cells present and are green by chlorophyll a and b. The cells are very small with 2 to 10 microns in diameter.
The cell wall of these algae genus consists of a multilayered cellulose skeleton in the layers are embedded in the polymeric hydrocarbon chains. The cells contain a single chloroplast and scattered in the cytoplasm lying mitochondria.
The multiplication is done apparently exclusively asexually, it was in any case no gamete observed.
Chlorella vulgaris is the type species of the genus Chlorella. It was described in 1889 by Martinus Willem Beijerinck in Delft and is now bred in official culture collections such as the German Collection of Microorganisms.
The genus Chlorella is not a monophyletic lineage. It is probably even a polyphyletic genus whose common features are caused by convergent evolution.
In the AlgaeBase following 24 species (currently recognized taxonomically ) as " currently accepted taxonomically " listed:
- Chlorella angustoellipsoidea Hanagata N. & M. Chihara
- Chlorella botryoides J. B. Petersen
- Chlorella capsulata R.R.L. Guillard, H.C. Bold & F. J. MacEntee
- Chlorella ellipsoidea Gerneck
- Chlorella emersonii Shihira & Krauss
- Chlorella fusca Shihira & Krauss
- Chlorella homosphaera Skuja
- Chlorella luteo - viridis Chodat Chlorella algae under the microscope.
- Chlorella marina Butcher
- Chlorella miniata ( Naegeli ) Oltmanns
- Chlorella minutissima Fott & Novakova
- Chlorella mirabilis V. M. Andreeva
- Chlorella ovalis Butcher
- Chlorella parasitica (K. Brandt ) Beijerinck
- Chlorella peruviana G.Chacón Roldán
- Chlorella rugosa J. B. Petersen
- Chlorella saccharophila ( Kruger ) Migula
- Chlorella salina Butcher
- Chlorella spaerckii Ålvik
- Chlorella sphaerica Tschermak - Woess
- Chlorella stigmatophora Butcher
- Chlorella subsphaerica H. Reisigl
- Chlorella trebouxioides M. Puncochárová
- Chlorella vulgaris Beijerinck
In Chlorella Melvin Calvin studied the photosynthesis, for which he received the Nobel Prize in 1961.
Chlorella can also be cultivated specifically. In terms of production technology, a distinction between the culture in open and closed systems. Chlorella is used for the production of foods, food supplements and cosmetics. Since 1999 exists in Germany a production facility for micro-algae in blocks / Altmark. In this alga is cultivated in a 500 -km-long glass tube system.
Chlorella is often used in alternative medicine as a means of heavy metal, especially during and after amalgam distances.
Advertising claims with the tenor "full nutrient spectrum of vitamins, minerals, protein and fatty acids " are classified by the supervisory authorities in Germany to be misleading as food supplement made from algae contain few nutrients in significant amounts. Similarly, statements that chlorophyll for humans is nutritionally important.