Puccinia levis
| Puccinia levis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia levis | ||||||||||||
| ( Saccardo & Bizzozero ) Magnus |
Puccinia levis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of sweet grasses of the Paniceae tribe . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs from the southern USA to Argentina .
features
Macroscopic features
Puccinia levis 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 levis 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 dark cinnamon to hazelnut brown uredia of the species grow on both sides of the leaves of the host plants. Their cinnamon to almost hazelnut brown uredospores are spherical to broadly ellipsoidal, 25–31 × 23–27 µm in size and finely spiky. The branches growing on both sides are black-brown, uncovered early and powdery. The dark hazel-brown teliospores are two-celled, generally septate lengthways , ellipsoidal to broadly ellipsoidal in shape and 31–43 × 26–33 µm in size; their stalk is colorless and up to 175 µm long.
distribution
The known distribution area of Puccinia levis includes America from the southern USA to Argentina .
ecology
The host plants of Puccinia levis are various sweet grasses of the Paniceae tribe . 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 .