Puccinia aristidae

Puccinia aristidae on spinach

Puccinia aristidae is a Ständerpilzart from the order of rust fungi ( Pucciniales ). The fungus is an endoparasite of the European solstice and the Süßgrasgattung Aristida. Symptoms of infestation by the way are rust spots and pustules on the leaf surfaces of host plants. It is distributed in the southern Palaearctic.

• 5.1 Notes and references

Features

Macroscopic characteristics

Puccinia aristidae 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 aristidae grows intercellular as with all Puccinia species and forms Saugfäden that grow in the storage tissues of the host. The cylindrical Aecien the type have 18-21 × 15-18 microns wide, hyaline Aeciosporen with warty surface. The zimtbraunen uredia of the fungus growing on the upper side in lines on the host leaves. Your golden brown uredospores are 25-33 × 18-23 microns in size, breitellipsoid to ellipsoid and warty. The on both or predominantly leaf upper side growing Telien the type are blackish, powdery and early open lying. They grow in rows and often flow together in up to 5 mm long strokes. The light chestnut brown teliospores are two-celled, oblong to breitellipsoid and 40-58 × 20-27 microns in size. Your handle is colorless and up to 175 microns long.

Artabgrenzung

Very similar to Puccinia is subnitens, especially his uredospores, which is considered to by some authors as a synonym of Puccinia aristidae. Cummins, however, sees him as an independent art

Dissemination

Whereas the known distribution area of Puccinia aristidae var aristidae from Afghanistan to North Africa extending, Puccinia is aristidae var chaetariae in North and South America, India and Africa spread.

Ecology

The host plants of Puccinia aristidae are for the haplonts European solstices ( Heliotropium europaeum ) and representatives of the Amaranthaceae and magic flowers and plants and various Aristida species 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 set free spores. The type has a development cycle with Telien, uredia, Aecien and spermogonia and does a landlord change through. Puccinia aristidae is described in the literature as pathogens on spinach and turnip, but is not aristidae between Puccinia and Puccinia subnitens distinguished.