Glaucocystis

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Glaucocystis
Glaucocystis sp.

Glaucocystis sp.

Systematics
without rank: Archaeplastida
without rank: Glaucophyta
Class : Glaucophyceae
Order : Glaucocystales
Family : Glaucocystaceae
Genre : Glaucocystis
Scientific name
Glaucocystis
Itzigs.

Claucocystis is an algae - type of the tribe of glaucophyte .

description

Glaucocystis forms elliptical, immobile cells with a nucleus , several star-shaped, blue-green cyanelles and contractile vacuoles . The cells rarely live individually, but mostly in groups of two, four, eight or 16 autospores . The cell wall can be thickened at the cell poles.

The cells of Glaucocystis contain numerous ribbon-shaped, blue-green colored inclusions called cyanelles. They used to be thought of as endosymbiotic cyanobacteria and even gave them their own generic name. In fact, they still have a cell wall remnant made of peptidoglycan , which is typical of blue-green algae, and contain their own DNA . The cyanella DNA of Cyanophora paradoxa , another species of the Glaucocystaceae , contains only one tenth of the genes found on the DNA of free-living cyanobacteria. The size of the cyanella DNA is similar to that of the DNA of the plastids of algae and vascular plants and largely corresponds to these in terms of genes. Cyanelles are not viable outside the host cells, so they are not blue-green algae and must be described as special plastids of the glaucophyta .

Reproduction

The asexual reproduction takes place over two to ten minute spores that remain for a while in the mother cell wall.

Sexual reproduction is unknown.

distribution

Glaucocystis lives mainly in bog waters , often between Sphagnum cushions.

Types (selection)

swell

  • Karl-Heinz Linne von Berg, Michael Melkonian u. a .: The Kosmos algae guide. The most important freshwater algae under the microscope. Kosmos, Stuttgart 2004, ISBN 3-440-09719-6 .

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