Puccinia stipae
| Puccinia stipae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia stipae | ||||||||||||
| ( Opiz ) Arthur |
Puccinia stipae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family and the sweet grass genus Stipa . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in large parts of America and Europe.
features
Macroscopic features
Puccinia stipae 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 stipae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the species have 23–28 × 22–26 µm in size, yellowish to golden aeciospores with a wrinkled surface. The cinnamon-brown uredia of the fungus grow on the upper side of the host leaves and are a maximum of 0.5 mm long. Their golden to cinnamon-brown uredospores are 23–26 × 20–23 µm in size, spherical to broadly ellipsoidal and finely spiky. The parts of the species growing on the top of the leaves are black-brown, exposed early and powdery. The hazel-brown teliospores are two-celled, usually ellipsoid to long ellipsoid and 43–53 × 20–25 µm in size. Their stalk is yellowish and up to 175 µm long.
distribution
The known distribution area of Puccinia stipae extends from Bolivia to Canada and Europe.
ecology
The host plants of Puccinia stipae are for the Haplont sunflower and Stipa - sweet grasses for the dikaryote . 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, Aecien and Spermogonia and changes host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .