Acetabularia
Sign in to saveAcetabularia is a genus of green algae in the family Polyphysaceae. Typically found in subtropical waters, Acetabularia is a single-celled organism, but gigantic in size and complex in form, making it an excellent model organism for studying cell biology. In form, the mature Acetabularia resembles the round leaves of a nasturtium, is tall and has three anatomical parts: a bottom rhizoid that resembles a set of short roots; a long stalk in the middle; and a top umbrella of branches that may fuse into a cap. Unlike other giant unicellular organisms, which are multinucleate, members of this genus
Species
Schirmalgen
Genus
- PhylumChlorophyta
- ClassUlvophyceae
- OrderDasycladales
- FamilyPolyphysaceae
Habitatmarine
via
Research
530 papers- Acetabularia.Endeavour · 1965
- Fine-structural aspects of morphogenesis in Acetabularia.International review of cytology · 1974
- Cell biology of acetabularia.Current topics in microbiology and immunology · 1969
- The chloroplasts of Acetabularia. The control of their multiplication and activities.Sub-cellular biochemistry · 1973
- Nucleocytoplasmic interrelationships in Acetabularia and some other dasycladaceae.International review of cytology. Supplement · 1979
via PubMed
Article
12 sectionsContents
- Etymology
- Anatomy and life cycle
- Hämmerling's experiment
- Morphogenesis
- Internal chemical gradients
- Circadian rhythms
- Aquarium trade
- See also
- References
- Further reading
- Sundry references
- External links
Acetabularia is a genus of green algae in the family Polyphysaceae. Typically found in subtropical waters, Acetabularia is a single-celled organism, but gigantic in size and complex in form, making it an excellent model organism for studying cell biology. In form, the mature Acetabularia resembles the round leaves of a nasturtium, is tall and has three anatomical parts: a bottom rhizoid that resembles a set of short roots; a long stalk in the middle; and a top umbrella of branches that may fuse into a cap. Unlike other giant unicellular organisms, which are multinucleate, members of this genus possess a single nucleus located in the rhizoid, which allows the cell to regenerate completely if its cap is removed. The caps of two Acetabularia may also be exchanged, even from two different species. In addition, if a piece of the stem is removed, with no access to the nucleus in the rhizoid, this isolated stem piece will also grow a new cap. right|thumb|Acetabularia mediterranea|A. mediterranea|alt=Details of A. mediterranea
In the 1930s–1950s Joachim Hämmerling conducted experiments in which he demonstrated Acetabularias genetic information is contained in the nucleus. This was the first demonstration that genes are encoded by DNA in eukaryotes; earlier studies by Oswald Avery and others had shown that this was true for prokaryotes.