Puccinia inaudita
| Puccinia inaudita | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia inaudita | ||||||||||||
| Jackson & Holway |
Puccinia inaudita is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family of the Wedelia and Zexmenia genera . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in Central America .
features
Macroscopic features
Puccinia inaudita 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 inaudita grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow predominantly on the upper side of the host leaves. The bilateral growing aecia of the species are cylindrical and grow in small groups. They have 25–34 × 19–27 µm, brownish aeciospores with a warty surface. Uredien are not or only rarely developed by the species. Their yellow-brown uredospores are 24–32 × 19–24 µm in size, mostly spherical to ellipsoidal and spiky. The parts of the species that grow underneath the leaves are light yellow, compact and uncovered. The colorless teliospores are unicellular, usually cylindrical to narrow ellipsoidal and 44–66 × 15–19 µm in size. Their stem is colorless and up to 50 µm long.
distribution
The known distribution area of Puccinia inaudita extends from Honduras to Mexico .
ecology
The host plants of Puccinia inaudita are Wedelia and Zexmenia . 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 goes through a development cycle with Spermogonia, Aecien, Telien and Uredien.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .