Puccinia helictotrichi
Puccinia helictotrichi | ||||||||||||
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Puccinia helictotrichi | ||||||||||||
Jørstad |
Puccinia helictotrichi is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Avenochloa schelliana . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to China .
features
Macroscopic features
Puccinia helictotrichi 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 helictotrichi 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 yellowish uredia of the fungus grow on both sides of the host leaves. Its uredospores are 27–38 × 20–26 µm in size, mostly broadly ellipsoidal to ovoid and finely spiky. The bilateral growing parts of the species are black-brown and long covered. The golden-brown to colorless teliospores are one to two-celled, usually club-shaped to long club-shaped and 40–60 × 17–22 µm in size. Their surface is finely prickly. Their stalk is yellowish and up to 15 µm long.
distribution
The known distribution area of Puccinia helictotrichi only includes China .
ecology
The host plant of Puccinia helictotrichi is Avenochloa schelliana . 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 .