Euglena gracilis
| Euglena gracilis | ||||||||||||
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Euglena gracilis |
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| Scientific name | ||||||||||||
| Euglena gracilis | ||||||||||||
| GAKlebs , 1883 |
Euglena gracilis ("slim" eye animal) is a type of protist from the genus of the eye animal ( Euglena ).
features
Euglena gracilis is 35 to 65 micrometers long and 5 to 15 micrometers wide. The rear end of the fast-swimming cells describes a wide circle during their own rotation, which becomes particularly strong when the cell is no longer swimming.
The six to twelve flattened, shield-shaped chloroplasts are large and have watch-glass- shaped paramylon hoods on both sides of the central pyrenoid . Palmellae arise in the mud.
ecology
Euglena gracilis is a rare freshwater species found in trenches and ponds with rotting leaves.
meaning
Euglena gracilis is an important model organism, especially in chloroplast physiology, as cultures can be stored for years without light, but photosynthesis starts again around 24 hours after being exposed to light . Some strains (there are also chloroplastless ones) are used in research into DNA and RNA, heterotrophic nutrition, photoreception and lipid metabolism, among other things .
Euglena gracilis copies are also part of the DLR's Eu: CROPIS satellite mission . To test a bio-regenerative life support system, artificial urine is converted into nitrate by bacteria in miniature greenhouses in satellites. The Euglena break down the resulting ammonia . Tomato plants are grown with the nutrient. The test is carried out with artificial gravity generated by rotation, successively in lunar and Mars conditions .
Euglena gracilis also serves as a test organism for vitamin B12, as it cannot synthesize it itself.
Culture
In contrast to most other Euglena species and eye animals, Euglena gracilis is very easy to cultivate. To do this, a batch of Euglena is mixed with a piece of hard cheese in a soil decoction medium. For such a culture to succeed, however, the soil must contain all the necessary nutrients and should not have been treated with pesticides or recently fertilized.
proof
- ↑ a b c d Gordon F. Leedale, Keith Vickerman : Euglenozoa , In: John J. Lee, GF Leedale, P. Bradbury (Eds.): An Illustrated Guide to the Protozoa . tape 2 . Allen, Lawrence 2000, ISBN 1-891276-23-9 , pp. 1142 .
- ↑ Greenhouses in Space - Successful start of the Eu: CROPIS mission. December 3, 2018, accessed December 3, 2018 .
- ^ A b Heinz Streble, Dieter Krauter: Life in the water drop . 13th edition. Kosmos, ISBN 978-3-440-15694-0 , pp. 16, 17, 124 .
