Puccinia coronata
Puccinia coronata on oat
Puccinia coronata is a Ständerpilzart from the order of rust fungi ( Pucciniales ). The fungus is an endoparasite of the buckthorn oil pastures and Berchemia and a variety of Süßgrasgattungen. Symptoms of infestation by the way are rust spots and pustules on the leaf surfaces of host plants. It is distributed worldwide.
Features
Macroscopic characteristics
Puccinia coronata 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 coronata growing intercellular like all Puccinia species and forms Saugfäden which grow in the tissue of the host memory. Your spermogonia are unknown. The whitish Aecien the type grow mainly under other in groups on the surface of host leaves. Their bright yellow Aeciosporen are 16-24 × 15-19 microns in size and warty. The on both or mainly on the underside of the mushroom growing uredia are yellow to yellow-brown, they have colorless paraphyses. The bright yellowish to almost colorless uredospores of 19-25 × 17-21 microns type are large, ellipsoidal to breitellipsoid and stachelwarzig. The expanding mutual Telien the type are blackish, long covered and provided with paraphyses. The gold to maroon teliospores are two-celled, crowned clavate and apically usually wrinkled and mostly 36-65 × 14-19 microns in size. Your stem is yellowish to brownish and short.
Dissemination
The known distribution area of Puccinia coronata covers the entire world.
Ecology
The host plants of Puccinia coronata are numerous different genera of grasses for the haploid buckthorn oil willow and Berchemia 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 way passes through a macrocyclic development cycle with spermogonia, Aecien, Telien and uredia. As heteroöker parasite it undergoes a change of host.