Puccinia idonea

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Puccinia idonea
Systematics
Subdivision : Pucciniomycotina
Class : Pucciniomycetes
Order : Rust mushrooms (Pucciniales)
Family : Pucciniaceae
Genre : Puccinia
Type : Puccinia idonea
Scientific name
Puccinia idonea
Jackson & Holway

Puccinia idonea is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Vernonia heydeana and Vernonia triflosculosa . 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 idonea 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 idonea grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are so far unknown. The yellow uredia of the fungus grow on both sides of the surface of the host leaves. Their hyaline uredospores are 23–28 × 18–21  µm in size, ovate to broadly ellipsoidal and spiky. The parts of the species growing underneath the leaves are black-brown and uncovered. The maroon teliospores are two-celled, warty and broadly ellipsoidal. Their stem is colorless and up to 90 µm long.

distribution

The known distribution area of Puccinia idonea extends from Guatemala to El Salvador .

ecology

The host plants of Puccinia idonea are the false asters Vernonia heydeana and V. triflosculosa . 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 macrocyclical development cycle with Spermogonia, Aecien, Telien and Uredien. As an auto-ecologic parasite, it does not change host .

literature