Puccinia pelargonii-zonalis

Uromyces geranii is a Ständerpilzart from the order of rust fungi ( Pucciniales ). The fungus is an endoparasite of stork beaks. Symptoms of infestation by the way are rust spots and pustules on the leaf surfaces of host plants. It is distributed throughout the northern hemisphere.

Features

Macroscopic characteristics

Uromyces geranii 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 geranii growing intercellular like all Uromyces species and forms Saugfäden which grow in the tissue of the host memory. The spermogonia the type are orange. Your growing on host leaves and stalks Aecien are initially hemispherical - nippled, later bowl -shaped. The Aeciosporen are mostly ovoid to ellipsoid and polyhedral, 21-31 × 17-22 microns orange and large. The sheet on the underside of the mushroom growing uredia are light brown. Your also light brown uredospores are broad ellipsoid to broadly ovate, 21-33 × 19-25 microns in size and stachelwarzig. Most leaf underside growing Telien the nature stand in groups on yellow or red leaf spots. The light brown teliospores are two-celled, usually ellipsoid to globose, 15-40 × 15-33 microns stachelwarzig and large. Your handle is colorless and short.

Dissemination

The known distribution area of Uromyces geranii includes the temperate northern hemisphere and coincides with that of its host species.

Ecology

The host plants of Uromyces geranii are various cranesbill (Geranium spp.). 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 type has a development cycle with Aecien, spermogonia, Telien and uredia and makes no change of host through.