Puccinia aestivalis
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia aestivalis | ||||||||||||
| Dietel |
Puccinia aestivalis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite from Microstegium . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. The distribution area extends from Japan to New Guinea .
features
Macroscopic features
Puccinia aestivalis can only be recognized with the naked eye by the spore beds protruding on the surface of the host. These grow in nests that appear as yellowish to brown spots and pustules on the leaf surfaces.
Microscopic features
The mycelium of Puccinia aestivalis is growing as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Spermogonia or aecidia are not known. The cinnamon-brown uredia grow on the underside of the leaves on the host's leaves. Their uredospores are oval, 20-25 × 18-21 µm in size, golden to cinnamon brown and finely spiky. The species has 26–32 × 20 µm amphispores of egg to pear-like shape. The parts of the species are cinnamon brown and grow freely. The light golden teleutospores are two-celled, oblong to long ellipsoid and 20–40 × 11–16 µm in size; their stalk is up to 20 µm long and yellowish.
distribution
The distribution area of Puccinia aestivalis includes an area that extends from Japan through Southeast Asia to New Guinea .
ecology
The host plant of Puccinia aestivalis is Anthephora hermaphrodita . 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 and Uredien, which manages without change of host. Spermogonia and aecidia are absent.
literature
- George B. Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .