Acrasidae
Order of Protozoa also known as the cellular slime moulds. They normally exist as free-living phagocytic soil amoebae (vegetative cells), but when bacterial prey become scarce, they aggregate to form a pseudoplasmodium (cf. true plasmodium of Eumycetozoida), that is capable of directed motion. The grex, or slug, migrates until stimulated by environmental conditions to form a fruiting body or sorocarp. The slug cells differentiate into elongated stalk cells and spores, where the cells are surrounded by a cellulose capsule. The spores are released from the sporangium at the tip of the stalk and, in favourable conditions, an amoeba emerges from the capsule, feeds, divides and so establishes a new population. They can be cultured in the laboratory and are widely used in studies of cell-cell adhesion, cellular differentiation, chemotaxis and pattern formation. The commonest species studied are Dictyostelium discoideum, D. minutum, and Polysphondylium violaceum.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • Acrasidae — Acrasis rosea Systematik Klassifikation: Lebewesen Domäne: Eukaryoten (Eucaryota) …   Deutsch Wikipedia

  • Percolozoa —   Percolozoa Diferentes etapas de Naegleria …   Wikipedia Español

  • Percolozoa — Taxobox name = Percolozoa image width = 153px image caption = Different stages of Naegleria domain = Eukaryota regnum = Excavata phylum = Percolozoa phylum authority = Cavalier Smith 1991 classis = Heterolobosea classis authority = Page Blanton… …   Wikipedia

  • Excavate — This article is about the protist group. For the process of digging, see Excavation (disambiguation). Excavates Giardia lamblia, a parasitic diplomonad Scientific classification …   Wikipedia

  • Eumycetozoa — Schleimpilze Gelbe Lohblüte (Fuligo septica) Systematik Klassifikation: Lebewesen …   Deutsch Wikipedia

  • Excavaten — Excavata Trichomonas vaginalis Systematik Klassifikation: Lebewesen …   Deutsch Wikipedia

  • Mycetozoa — Schleimpilze Gelbe Lohblüte (Fuligo septica) Systematik Klassifikation: Lebewesen …   Deutsch Wikipedia

  • Myxomycet — Schleimpilze Gelbe Lohblüte (Fuligo septica) Systematik Klassifikation: Lebewesen …   Deutsch Wikipedia

  • Myxomyceten — Schleimpilze Gelbe Lohblüte (Fuligo septica) Systematik Klassifikation: Lebewesen …   Deutsch Wikipedia

  • Myxomycetes — Schleimpilze Gelbe Lohblüte (Fuligo septica) Systematik Klassifikation: Lebewesen …   Deutsch Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”