Puccinia kakamariensis
| Puccinia kakamariensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia kakamariensis | ||||||||||||
| Wakefield & Hansford |
Puccinia kakamariensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass genus Sporobolus . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs south of the Sahara .
features
Macroscopic features
Puccinia kakamariensis 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 kakamariensis 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 or underside on the leaves of the host. Their hyaline uredospores are ellipsoidal to pear-shaped, 20–24 × 17–20 µm in size and finely spiky. The bilateral growing parts of the species are black-brown, powdery and uncovered early. The hazel-brown teliospores are two-celled, sometimes longitudinally septate, usually long ellipsoidal to ellipsoidal and 32–42 × 22–26 µm in size. Their stem is almost colorless and up to 150 µm long.
distribution
The known distribution area of Puccinia kakamariensis includes Africa south of the Sahara .
ecology
The host plants of Puccinia kakamariensis are various Sporobolus species. 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 .