Puccinia cyani

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Puccinia cyani
Systematics
Subdivision : Pucciniomycotina
Class : Pucciniomycetes
Order : Rust mushrooms (Pucciniales)
Family : Pucciniaceae
Genre : Puccinia
Type : Puccinia cyani
Scientific name
Puccinia cyani
Passerini

Puccinia Cyani is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the genus Centaurea . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is spread all over the world.

features

Macroscopic features

Puccinia cyani 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 Cyani grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow systemically and bilaterally on the surface of the host leaves. The also systemically growing aecia of the species are cinnamon brown. Their pale yellowish aeciospores are 23–26 × 20–24  µm in size, spherical to broadly ellipsoidal and spiky. The uredia of the fungus, mostly growing underneath the leaves, are cinnamon brown. The cinnamon brown uredospores of the species are 23–26 × 20–24 µm in size, ovate to broadly ellipsoidal and spiky. The systemically growing parts of the species are black-brown, powdery and uncovered. The chestnut-brown teliospores are two-celled, usually ellipsoidal to broadly ellipsoidal, wrinkled and usually 35–42 × 25–28 µm in size. Their stem is colorless.

distribution

The known distribution area of Puccinia cyani coincides with the distribution of its host genus, it can be found in large parts of the world.

ecology

The host plants of Puccinia cyani are various knapweeds ( Centaurea spp.). 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 a self-sufficient parasite, it does not change host .

literature

Web links