Puccinia baccharidis multiflorae
| Puccinia baccharidis multiflorae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia baccharidis multiflorae | ||||||||||||
| Dietel & Holway |
Puccinia baccharidis multi-florae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Baccharis . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in large parts of South and Central America.
features
Macroscopic features
Puccinia baccharidis-multiflorae 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 baccharidis Multi florae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow in small groups on the upper side of the host leaves. The aecia of the species growing on the top of the leaves are light yellow-brown. The aeciospores are similar to the uredospores. The uredia of the mushroom growing on the underside of the leaves are cinnamon brown. Their golden to cinnamon-brown uredospores are 32–38 × 23–27 µm in size, egg-shaped and spiky. The parts of the species that grow underneath the leaves are cinnamon-brown, compact and uncovered. The golden brown teliospores are two-celled, usually long ellipsoid and 44–52 × 22–27 µm in size. Their stem is colorless and up to 75 µm long.
distribution
The known distribution area of Puccinia baccharidis-multiflorae extends from South America to southern Mexico .
ecology
The host plants of Puccinia baccharidis multiflorae are diverse Baccharis 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 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 .