Bacillaria
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| JF Gmelin |
Bacillaria is a genus of diatoms (Bacillariophyta) with around 4 species, one of which, Bacillaria paradoxa , occurs in fresh water, the other in sea water.
features
The representatives form highly mobile colonies. The cells have a two-counter shell, which is typical for diatoms. The bowl is oblong and rectangular when viewed from the side and linear when viewed from the bowl. They are connected to their neighbors via the shell surfaces. They have two plate-shaped plastids that are colored golden brown by fucoxanthin . The plastids leave the center free, in which the cell nucleus sits.
Asexual reproduction occurs through the typical dichotomy of diatoms. Sexual reproduction is unknown. For Bacillaria paradoxa was apogamy describes the formation zygotenähnlicher stages without Gametenverschmelzung.
Occurrence
Bacillaria paradoxa lives in the sediment and plankton of freshwater, preferably those with a higher salt content. The remaining species are marine life.
supporting documents
- 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 , p. 240.