Puccinia amphigena
| Puccinia amphigena | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia amphigena | ||||||||||||
| Dietel |
Puccinia amphigena is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of winds and the sweet grass Calamovilfa longifolia . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in much of North America .
features
Macroscopic features
Puccinia amphigena 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 amphigena 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 18–22 × 16–19 µm colorless aeciospores with a wrinkled surface. The cinnamon-brown uredia of the fungus grow on both sides of the host leaves. Their cinnamon-brown uredospores are 23–29 × 19–23 µm in size, mostly broadly ellipsoidal and finely spiky. The bilateral growing parts of the species are black-brown, exposed early and compact. The hazelnut-brown teliospores are two-celled, usually club-shaped to long club-shaped and 40–54 × 18–23 µm in size. Their stem is golden and up to 80 µm long.
distribution
The known distribution area of Puccinia amphigena extends from southern Canada to the central USA .
ecology
The host plants of Puccinia amphigena are for the Haplonten winds ( Smilax spp.) And Calamovilfa longifolia 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 .