Puccinia milii-effusi
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Puccinia milii effusi is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of rue mussels and forest flax grass . Symptoms of infestation by the species are yellow spots of rust and pustules on the leaf surfaces of the host plants. The distribution area covers a southern European area.
features
Puccinia milii-effusi can only be recognized with the naked eye from the spore beds protruding on the surface of the host. They grow in nests that appear as yellowish to brown or blackish spots and pustules on the leaf surfaces.
The mycelium of Puccinia milii effusi grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your pyknia is not well known. The aecia of the species grow in loose groups and form brown spots. They have approximately spherical to ellipsoidal aecidiospores of 18-25 × 17-21 µm , which are warty on the surface. The uredia are scattered, small, elongated, and pale orange-yellow. Their uredospores are spherical to ellipsoidal, 22–28 × 19–23 µm in size, orange and prickly. The parts of the kind are round or oblong and colored black. The teleutospores are two-celled, cylindrical to club-shaped and 37–80 × 10–18 µm in size. They are brown, their stem is very short and dark brown.
distribution
Puccinia milii-effusi has a distribution area that extends over southern Europe.
ecology
The host plants of Puccinia milii-effusi are haplont rue mussel flowers ( Isopyrum thalictroides ) and forest flutter grass ( Milium effusum ) for the dikaryote . The fungus feeds on the nutrients present in the storage tissue of the plants, its spore beds later break through the leaf surface and release spores. The species has a development cycle with pycnias, uredia, telia and aecidia.
literature
- Ernst Gäumann: The rust fungi of Central Europe. With special consideration of Switzerland . In: Contributions to the cryptogam flora in Switzerland . tape XII . Commission publisher Buchdruckerei Büchler & Co, Bern 1959.