Puccinia wolgensis
| Puccinia wolgensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia wolgensis | ||||||||||||
| Navashin |
Puccinia wolgensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of various feather grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It iswidespread in the Palearctic .
features
Macroscopic features
Puccinia wolgensis 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 wolgensis 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 same applies to the uredia of the fungus. Its golden uredospores are 25–28 × 23–25 µm in size, broadly ellipsoidal to spherical and finely spiky. The parts of the species growing underneath the leaves are brown, powdery and uncovered early. The golden teliospores are two-celled, usually broadly ellipsoidal and 40–63 × 34–50 µm in size. Their surface is smooth to rough. Their stem is colorless and at least 125 µm long.
distribution
The known distribution area of Puccinia wolgensis extends from Morocco to Syria to Central Asia.
ecology
The host plants of Puccinia wolgensis are feather grasses ( Stipa spp.). 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 their host are known; Uredien, Spermogonia and Aecien 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 .