Uromyces graminis

Uromyces graminis is a Ständerpilzart from the order of rust fungi ( Pucciniales ). The fungus is an endoparasite of umbelliferous plants, as well as from Melica - grasses. Symptoms of infestation by the way are rust spots and pustules on the leaf surfaces of host plants. It is distributed in the south-western Palearctic.

Features

Macroscopic characteristics

Uromyces graminis with the naked eye can be seen only on the basis of the projected on the surface of the host spore deposits. They grow in clusters that appear as yellowish to brown spots and pustules on the leaf surfaces.

Microscopic characteristics

The mycelium of Uromyces graminis growing intercellular like all Uromyces species and forms Saugfäden which grow in the tissue of the host memory. The bubble-shaped Aecien the type having 22-32 × 22-32 microns large, globular and yellowish Aeciosporen with warty surface. The zimtbraunen uredia of the fungus growing on the upper side on the host leaves. Your golden uredospores are 24-29 × 21-24 microns in size, mostly breitellipsoid and stachelwarzig. The Telien the type are black brown, compact and early uncovered. The deep golden to clear maroon teliospores are single-celled, usually ovoid to ellipsoid and 22-31 × 17-24 microns in size. Your handle is colorless to brownish and up to 50 microns long.

Dissemination

The known distribution area of Uromyces graminis includes southern Europe and North Africa.

Ecology

The host plants of Uromyces graminis are haploid for the Apiaceae (Umbelliferae spp. ) And various types of Melica for the dikaryotic. The fungus feeds on the present in storage tissues of the plant nutrients, its spores bearing later break through the leaf surface, and put spores free. The way goes through a development cycle with spermogonia, Aecien, Telien and uredia and undergoes a change of host.