Puccinia subnitens

Puccinia subnitens is a Ständerpilzart from the order of rust fungi ( Pucciniales ). The fungus is an endoparasite of asteroids and clove -like and the Süßgrasgattungen Distichlis and Monanthochloe. Symptoms of infestation by the way are rust spots and pustules on the leaf surfaces of host plants. It is distributed in many parts of America.

• 5.1 Notes and references

Features

Macroscopic characteristics

Puccinia subnitens 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 subnitens 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 15-23 × 13-21 microns large, globular, colorless to yellowish Aeciosporen with warty surface. The compact, yellow-brown uredia of the fungus growing on the upper side on the host leaves. Your golden brown uredospores are 20-26 × 19-24 microns in size, globose to breitellipsoid and warty. The leaf on the upper side of the growing Telien kind are black brown, compact and early open lying. They grow in rows and often flow together in up to 5 mm long strokes. The Maroon teliospores are two-celled and 36-46 × 19-24 microns in size. Your handle is colorless and up to 160 microns long.

Artabgrenzung

Very similar is Puccinia aristidae, especially his uredospores, which is considered to by some authors as a synonym of Puccinia subnitens. Cummins sees de type that occurs on Aristida species, however, as an independent art

Dissemination

The known distribution area of Puccinia subnitens extends from western South America to the continental and coastal North America.

Ecology

The host plants of Puccinia subnitens are for the haploid Asterides and Caryophyllales and Monanthochloe littoralis and various Distichlis 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 put spores free. The type has a development cycle with Telien, uredia, Aecien and spermogonia and does a landlord change through.