Puccinia procera
| Puccinia procera | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia procera | ||||||||||||
| Dietel & Holway |
Puccinia procera is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Phacelia species and couch grass . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs Holarctic .
features
Macroscopic features
Puccinia procera can only be recognized with the naked eye by means of the spore beds emerging 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 procera growing as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The cup-shaped aecia of the species have 29–38 × 26–32 µm large, spherical and hyaline- light yellowish aeciospores. The cinnamon-brown uredia of the species grow on the upper side of the leaves of the host plant. Their golden to cinnamon-brown uredospores are usually broadly ellipsoidal to ovate, 32–44 × 28–34 µm in size and finely spiky. The underside of the leaf growing parts of the species are blackish and long covered. The hazelnut-brown teliospores of the fungus are two-celled, usually elongated to long club-shaped and 50–70 × 16–22 µm in size. Their stalk is brownish and up to 15 µm long.
distribution
The known range of Puccinia procera includes the coast of California and southeastern Europe .
ecology
The host plants of Puccinia procera are for haplonts different phacelia TYPES and couch grass ( Elymus spp.) 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 Telien, Uredien, Spermogonia and Aecien and changes host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .