Puccinia egregia

from Wikipedia, the free encyclopedia
Puccinia egregia
Systematics
Subdivision : Pucciniomycotina
Class : Pucciniomycetes
Order : Rust mushrooms (Pucciniales)
Family : Pucciniaceae
Genre : Puccinia
Type : Puccinia egregia
Scientific name
Puccinia egregia
Arthur

Puccinia egregia is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Vernonia uniflora . 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 egregia 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 egregia grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are not yet known. The uredia of the fungus growing on both sides of the host leaves are yellowish to cinnamon-brown and have colorless paraphyses. Their yellowish to light cinnamon-brown uredospores are 28–32 × 23–28 µm in size, ovate to spherical and spiky. The parts of the species that grow on both or mainly underside of the leaves are chocolate brown, powdery and uncovered. The clear maroon teliospores are two-celled, usually broad ellipsoid, wrinkled and 40–45 × 28–32 µm in size. Their stem is colorless and up to 85 µm long.

distribution

The known distribution area of Puccinia egregia covers Mexico from Sonora to the south.

ecology

The host plant of Puccinia egregia is Vernonia uniflora . 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.

literature