Puccinia alia
| Puccinia alia | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia alia | ||||||||||||
| Jackson & Holway |
Puccinia alia is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Baccharis trinervis . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in much of Central America.
features
Macroscopic features
Puccinia alia can only be recognized with the naked eye by 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 alia grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your spermogonia grow on both sides of the host leaves. The aecia of the species, which also grow on both sides, are sunk into the epidermis. They have 26–35 × 18–23 µm, mostly egg-shaped to ellipsoidal aeciospores with a spiky surface. The uredia of the fungus growing on the underside of the leaves are yellow. Their light golden to yellowish uredospores are 26–35 × 18–22 µm in size, ovate to ellipsoidal and spiky. The parts of the species that grow underneath the leaves are cinnamon-brown, compact and uncovered early. The golden-brown teliospores are two-celled, usually long ellipsoid and 44–60 × 17–22 µm in size. Their stem is colorless and up to 60 µm long.
distribution
The known distribution area of Puccinia alia extends from Brazil to Guatemala .
ecology
The host plant of Puccinia alia is Baccharis trinervis . 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 .