Puccinia pattersoniae
| Puccinia pattersoniae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia pattersoniae | ||||||||||||
| Sydow & Sydow |
Puccinia pattersoniae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Tripsacum dactyloides . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to the United States .
features
Macroscopic features
Puccinia pattersoniae 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 pattersoniae 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 cinnamon-brown uredia of the fungus grow on the underside of the host's leaves. Their cinnamon-brown uredospores are mostly spherical, 30–33 × 27–32 µm in size and finely spiky. The mostly underside growing parts of the species are black-brown, powdery and uncovered early. The hazelnut-brown teliospores are two-celled, usually long ellipsoidal to narrowly ovoid and 40–54 × 18–22 µm in size. Their stem is golden to yellowish and up to 70 µm long.
distribution
The known distribution area of Puccinia pattersoniae covers the eastern United States from Texas to Maryland .
ecology
The host plant of Puccinia pattersoniae is Tripsacum dactyloides . 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 .