Euglena


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Euglena

[yü′glē·nə]
(biology)
A genus of organisms with one or two flagella, chromatophores in most species, and a generally elongate, spindle-shaped body; classified as algae by botanists (Euglenophyta) and as protozoans by zoologists (Euglenida).

Euglena

 

a genus of microscopic motile single-celled organisms of the division Euglenophyta. The cell is spindle- or ribbon-shaped, with a pellicle in front, a single external flagellum, and a stigma next to the gullet. The ocellus is red. The chloroplasts are green and frequently complex in structure.

About 60 species of euglenas are known. They mainly inhabit shallow bodies of water, where they swim at any depth. Some species, such as Euglena viridis, can discard the flagellum and creep or, after taking on a spherical form, live immobile on the surface of the water, silt, or soil. Under unfavorable conditions they become transformed into spores. Nutrition is usually myxotrophic, or if there is a loss of chlorophyll, saprophytic. The organisms are distributed widely and sometimes cause the coloration of waters. Euglena sanguinea, which is rich in carotene, makes water red. Euglenas are used in laboratory experiments.

References in periodicals archive ?
Los generos registrados en esta investigacion corresponden a los encontrados en estudios de tratamiento de aguas residuales y lixiviados (Tabla 5), donde los generos dominantes son Chlamydomonas y/o Euglena (Khattabi et al.
In the end, all students found the games acceptable, pointing out that Euglena are nonsentient and cannot feel pain.
Izumo: Euglena is a kind of seaweed and at the same time it contains nutrition from animals , and so it would be most appropriate for addressing the malnutrition problem.
Euglena-Evidence Cards Euglena does nor hove a cell Euglena contains chloroplasts wall Euglena has a nucleus Euglena is a single cell organism Euglena can absorb food from Euglena contused early its surroundings scientists Euglena Is normally green The nucleus Contains DNA and controls the cell activities Chloroplasts enable a cell to A vacuole controls the amount photosynthesize of Squid in a cell Euglena swims through water Euglena can make its own food Euglena has a vacuole Euglena is light sensitive Euglena contains cytoplasm Euglena can change its shape Euglena lives in ponds and Euglena is temperature puddles sensitive Euglena con reproduce There are more than two classification groups Figure 2: Euglena classification activity (from Osbor Erduran & Simon, 2004).
Baba's team turned to Euglena in an effort to solve the medical problem of detecting the minute number of cancer cells that break off from the original, or primary, tumour site and travel through the bloodstream.
Students develop questions ranging from straightforward investigation of one particular nutrient on Euglena growth to more complex questions about the interactions of multiple factors, such as light and carbon source.
The Midorimushi Kasutela (Euglena Sponge Cake), which contains millions of the microscopic Euglena in each slice, is nutritious and becoming increasingly popular in Japan amid a health food craze, according to its developers.
Decleor's Aroma Night Regenerating and Wrinkle Firmness creams both feature euglena extract--a fresh water micro algae that has the ability to live and multiply in the presence or absence of life--as well as rare black orchid extract, which is high in sugars, natural amino acids and omegas and can strengthen the barrier of the skin by helping to protect the cells from external pollutants.
Preliminary experiments as a test of the method were performed on Euglena gracilis.
2002, "Investigation of metal ion accumulation in Euglena gracilis by fluorescence methods Nucl.
Phormidium tenue, Euglena convoluta, and Trachdomonas volvocina.
Cadmium-dependent generation of reactive oxygen species and mitochondrial DNA breaks in photosynthetic and nonphotosynthetic strains of Euglena gracilis.