Puccinia viatica

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Puccinia viatica
Systematics
Subdivision : Pucciniomycotina
Class : Pucciniomycetes
Order : Rust mushrooms (Pucciniales)
Family : Pucciniaceae
Genre : Puccinia
Type : Puccinia viatica
Scientific name
Puccinia viatica
Hens & Cummins

Puccinia viatica is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Porophyllum punctatum . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to Mexico .

features

Macroscopic features

Puccinia viatica 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 viatica grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are unknown. The uredia of the fungus growing on the underside of the host leaves are yellow-brown. Their light golden brown uredospores are 24–28 × 22–25 µm in size, spherical to broadly ellipsoidal and spiky. The parts of the species that grow underneath the leaves are black-brown and powdery. The chestnut-brown teliospores are two-celled, generally broad ellipsoid, wrinkled and 36–42 × 23–29 µm in size. Their stem is colorless and up to 42 µm long.

distribution

The known distribution area of Puccinia viatica only includes the Mexican Jalisco .

ecology

The host plant of Puccinia viatica is Porophyllum punctatum . 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 , of which only Telien and Uredien and their host are known so far; Spermogonia and Aecien could not be assigned to her.

literature