Puccinia lasiagrostis
| Puccinia lasiagrostis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia lasiagrostis | ||||||||||||
| Tranzschel |
Puccinia lasiagrostis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the Artemisia species and of the sweet grass Stipa splendens . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in Central Asia .
features
Macroscopic features
Puccinia lasiagrostis 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 lasiagrostis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The cylindrical aecia of the species have 22–29.5 × 17–22.5 µm large, hyaline aeciospores with a wrinkled surface. The uredia of the fungus grow on the underside of the host leaves. Their yellowish uredospores are 20–35 × 20–35 µm in size, spherical to ellipsoidal and finely spiky. The parts of the species growing on the underside of the leaves and on sheaths are blackish and exposed early; they are up to 5 mm long. The teliospores are two-celled, usually spindle-shaped to long club-shaped and 50–70 × 19–27 µm in size. Their stalk is hyaline to yellowish and up to 175 µm long.
distribution
The well-known distribution area of Puccinia lasiagrostis covers the east- central Asia between Russia , China and Mongolia .
ecology
The host plants of Puccinia lasiagrostis are for the Haplonts Artemisia species (possibly also other sunflower ) and Stipa splendens 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 et al. 1971, ISBN 3-540-05336-0 .