Plasmodiophorida

Plasmodiophorida
Plasmodiophora brassicae on the roots of cauliflower
Systematics
without rank: Diaphoreticks without rank: Sar without rank: Rhizaria without rank: Cercozoa without rank: Phytomyxea without rank: Plasmodiophorida
Scientific name
Plasmodiophorida
Cook , 1928

The Plasmodiophorida are a group of parasitic slime molds that are systematically added to the Cercozoa .

Features and way of life

The plasmodiophorida form cell walls made of chitin . They have a special form of core division. During the metaphase , the chromatin is arranged perpendicular to the large, elongated nucleolus : a cross-shaped structure is created. The zoospores have two flagella of unequal length .

Both haploid and diploid plasmodia occur in the life cycle .

The species live as obligatory endoparasites in vascular plants , algae and fungi .

Systematics

The Plasmodiophorida together with the genus Phagomyxa form the Phytomyxea .

There are 10 genera with a total of around 35 species:

• Ligniera
• Membranosorus
• Octomyxa
• Plasmodiophora
  • Plasmodiophora brassicae , causative agent of carbonic hernia
• Polymyxa
• Sorodiscus
• Sorosphaera
• Spongospora
• Tetramyxa
• Voronina

supporting documents

• A. Bresinsky, Ch. Körner, JW Kadereit, G. Neuhaus, U. Sonnewald: Strasburger - textbook of botany . 36th edition, Spektrum Akademischer Verlag, Heidelberg 2008, p. 645. ISBN 978-3-8274-1455-7

Individual evidence

1. ↑ Thomas Cavalier-Smitha, Ema E.-Y. Chao: Phylogeny and Classification of Phylum Cercozoa (Protozoa) . Protist, Volume 154, 2003, pp. 341-358, doi : 10.1078 / 143446103322454112
2. ↑ JP Braselton: Plasmodiophorid Homepage , accessed December 10, 2008.

Web links

• Plasmodiophoride homepage from JP Braselton