Puccinia pratensis
| Puccinia pratensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia pratensis | ||||||||||||
| Blytt |
Puccinia pratensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of various Avenochloa - sweet grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in Europe.
features
Macroscopic features
Puccinia pratensis 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 prevention grows, as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia or spermogonia of the species are not known. The cinnamon-brown uredia of the fungus grow under or on both sides of the host leaves. Its golden to cinnamon-brown uredospores are 28–35 × 26–30 µm in size, broadly ellipsoidal to ovoid and finely spiky. The parts of the species growing on both sides or underside of the leaves are brown, powdery and uncovered early. The golden-brown teliospores are two-celled, usually broadly ellipsoidal to ovoid and 42–60 × 28–35 µm in size. Their surface is finely prickly. Their stem is fragile and usually breaks off near the tip.
distribution
The known distribution area of Puccinia pratensis covers large parts of Europe .
ecology
The host plants of Puccinia pratensis are Avenochloa pratensis and Avenochloa versicolor . 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 of which only Telien and Uredien and their host are known; Spermogonia and aecia could not be assigned to the fungus.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .