Puccinia poarum

Puccinia poarum on a Huflattichblatt

Puccinia poarum is a Ständerpilzart from the order of rust fungi ( Pucciniales ). The fungus is an endoparasite of composite flowers and numerous grasses. Symptoms of infestation by the way are rust spots and pustules on the leaf surfaces of host plants. The species occurs in Eurasia and America.

Features

Macroscopic characteristics

Puccinia poarum 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 Puccinia poarum grows intercellular as with all Puccinia species and forms Saugfäden that grow in the storage tissues of the host. The Aecien the type having 20-27 × 18-24 microns wide, breitellipsoide to spherical and hyaline - yellowish Aeciosporen. The bright orange-yellow uredia kind of grow on the upper side of the leaves of the host plant. Your light yellow to almost colorless uredospores are usually ellipsoid to ovoid, 23-30 × 17-24 microns in size and finely stachelwarzig. The leaf underside growing Telien of type long covered. The gold to hazel teliospores of the fungus are one-to two-celled, long cylindrical to ovate in general and 40-58 × 17-25 microns in size. Your stem is yellowish to colorless and up to 15 microns long.

Dissemination

The known distribution area of Puccinia poarum enough Europe to Asia and North America to South America.

Ecology

The host plants of Puccinia poarum are (Asteraceae spp. ) And grasses ( Poaceae spp. ) For the dikaryotic for the haploid daisy family. The fungus feeds on the present in storage tissues of the plant nutrients, its spores bearing later break through the leaf surface and set free spores. The type has a development cycle with Telien, uredia, spermogonia and Aecien and does a landlord change through.