Puccinia kawandensis
| Puccinia kawandensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia kawandensis | ||||||||||||
| Cummins |
Puccinia kawandensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Chrysopogon aucheri . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Uganda .
features
Macroscopic features
Puccinia kawandensis 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 kawandensis 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-brown uredia of the fungus grow on both sides of the host's leaves. Their hazel to dark cinnamon-brown uredospores are usually ovate to broadly ellipsoidal, 28–33 × 20–25 µm in size and finely spiky. The bilateral growing parts of the species are black-brown, powdery and uncovered early. The hazelnut-brown teliospores are two-celled, occasionally long-septate, usually ellipsoid to broadly ellipsoid and 33–43 × 25–29 µm in size. Their stalk is yellowish and up to 90 µm long.
distribution
The known distribution area of Puccinia kawandensis only includes Uganda .
ecology
The host plant of Puccinia kawandensis is Chrysopogon aucheri . 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 .