Puccinia duthiae
| Puccinia duthiae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia duthiae | ||||||||||||
| Ellis & Tracy |
Puccinia duthiae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Barleria cuspidata , Bothriochloa and Andropogon species as well as Dichanthium annulatum . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in the tropics of the ancient world.
features
Macroscopic features
Puccinia duthiae 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 duthiae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aeciospores of the species are spherical, wrinkled and 17–22 × 17–22 µm. The cinnamon-brown uredia of the fungus usually grow on the underside of the leaf surfaces of the host plant. Their cinnamon - brown uredospores are oval, 26–32 × 18–23 µm in size and finely spiky. The parts of the species growing underneath the leaves are black-brown, exposed early and compact. The hazel-brown teliospores are two-celled, generally broadly ellipsoidal and 25–42 × 22–27 µm in size; their stalk is yellowish to brownish and up to 120 µm long.
distribution
The known distribution area of Puccinia duthiae extends from South Africa and Tanzania via India and China to Australia .
ecology
The host plants of Puccinia duthiae are Barleria cuspidata for the Haplont , Bothriochloa and Andropogon species and Dichanthium annulatum for the Dikaryote . 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 with Telien, Uredien, Spermogonia and Aecien and completes a host change.
literature
- George B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .