Puccinia neyraudiae
| Puccinia neyraudiae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia neyraudiae | ||||||||||||
| Sydow & Sydow |
Puccinia neyraudiae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Neyraudia madagascarensis . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to India .
features
Macroscopic features
Puccinia neyraudiae 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 neyraudiae 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 yellow uredia of the fungus grow on both sides of the host leaves. Their light yellow to hyaline uredospores are 25–30 × 19–22 µm in size, broadly ellipsoidal to ovoid and finely spiky. The bilateral growing parts of the species are chocolate brown, powdery and exposed early. The light hazelnut-brown teliospores are two-celled, usually broadly ovate to broadly ellipsoid and 32–40 × 23–28 µm in size. Its stem is yellowish to colorless and up to 160 µm long.
distribution
The known distribution area of Puccinia neyraudiae only includes India .
ecology
The host plant of Puccinia neyraudiae is Neyraudia madagascarensis . 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 et al. 1971, ISBN 3-540-05336-0 .