Puccinia pygmaea
| Puccinia pygmaea | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia pygmaea | ||||||||||||
| Eriksson |
Puccinia pygmaea is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of barberries ( Berberis spp.) And sweet grasses of the tribe Aveneae and Poeae . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common to montane and temperate regions around the world.
features
Macroscopic features
Puccinia pygmaea can only be recognized with the naked eye by means of the spore beds protruding on the surface of the host. They grow in nests that appear as yellowish to brown spots and pustules on the leaf surfaces.
Microscopic features
The mycelium of Puccinia pygmaea grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the species grow locally on barberries, their hyaline aeciospores are wrinkled and 19–24 × 16–20 µm in size. The light cinnamon-brown uredia of the mushroom grow on the upper leaf surfaces of the host plant. Their cinnamon-brown to yellowish uredospores are broadly ellipsoidal to ovoid, 26–32 × 21–24 µm in size and finely spiky. Most leaf underside Telien the type are blackish, covered and compact. The hazelnut-brown teliospores are two-celled, usually long ovate to oblong and 36–48 × 17–22 µm in size; their stalk is yellowish and up to 15 µm long.
distribution
The known distribution area of Puccinia pygmaea includes the whole world, the species occurs in montane and temperate regions.
ecology
The host plants of Puccinia pygmaea are barberry ( Berberis spp.) For the haploid , Agrostis ( Agrostis ), beach grass ( Ammophila ), Calamagrostis ( Calamagrostis ), fescue ( Festuca ) and Deschampsia glossii for the dikaryotic . The fungus feeds on the nutrients present in the storage tissue of the plants, its spore beds later break through the leaf surface and release spores. The species has a development cycle with Aecien, Spermogonia, Telien and Uredien and undergoes a host change.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .
Web links
- (Obligatory) Phytoparasitic small mushrooms: Puccinia pygmaea : Description and pictures on the homepage of Julia Kruse