Eudorina
| Eudorina | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Eudorina Colony |
||||||||||||
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Eudorina | ||||||||||||
| Ehrenberg , 1832 |
Eudorina is an algae - genus from the class of Chlorophyceae .
description
Eudorina forms free-swimming oval to spherical colonies from mostly 32, less often 8, 16 or 64 individual cells , which are located well apart from each other in the periphery of a common jelly. The cells are usually arranged in several rings (levels). In the front there is a four-cell wreath, in the center there are three eight-cell wreaths and at the back there is another four-cell wreath. This description applies to a 32 cell colony. The structure of the cells corresponds to that of Chlamydomonas . In the colonies there is sometimes an anterior and posterior end, with the anterior cells having larger eye spots . The cells reach a length of 16 to 24 µm, the colonies a length of 60 to 200 µm.
Reproduction
The asexual multiplication takes place as follows: Each cell of a colony (in some species not the cells of the front ring) form after three to six cell divisions within the curd a daughter colony, which after inversion (inversion) is released.
The sexual reproduction is done by anisogamy or oogamy (egg fertilization). The yellow, smooth-walled permanent zygote initially remains in the jelly of the mother colony; it germinates with reduction division and releases one or more flagellated cells during germination .
distribution
Eudorina lives planktonically in oligo- to eutrophic stagnant waters.
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 .
- Heinz Streble , Dieter Krauter : Life in a drop of water. Microflora and microfauna of freshwater. An identification book. 10th edition. Kosmos, Stuttgart 2006, ISBN 3-440-10807-4 .
