Puccinia bromoides
| Puccinia bromoides | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia bromoides | ||||||||||||
| Guyot |
Puccinia bromoides is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Avenochloa bromoides . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to France .
features
Macroscopic features
Puccinia bromoides 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 bromoides 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 both sides of the host leaves. Its golden-brown uredospores are 27–30 × 24–27 µm in size, broadly ellipsoidal to spherical and finely spiky. The parts of the species are not known. The golden-brown teliospores are two-celled, usually broadly ellipsoidal to ovoid and 37–48 × 27–31 µm in size. Their surface is finely prickly. Their stem is fragile and usually breaks off near the tip.
distribution
The known distribution area of Puccinia bromoides only includes France .
ecology
The host plant of Puccinia bromoides is Avenochloa bromoides . 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 uredia and their host are known so far; Telia, spermogonia and aecia could not be assigned to the fungus.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin et al. 1971, ISBN 3-540-05336-0 .