Puccinia clematidis secalis
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| Puccinia clematidis secalis | ||||||||||||
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Puccinia Clematidis-secalis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of clematis and grasses of the subfamily Pooideae . Symptoms of infestation by the species are yellow spots of rust and pustules on the leaf surfaces of the host plants. The distribution area includes the western Mediterranean.
features
Puccinia clematidis-secalis can only be recognized with the naked eye by means of 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 Clematidis-secalis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your pyknia grow in groups and are point-shaped and honey-colored. The aecia of the species grow in dense groups and form yellowish swollen areas. They have approximately spherical to ellipsoidal aecidiospores of 23 to 30 × 20-25 µm , which are hyaline and warty. The uredia are scattered and yellow-orange. Their uredospores are ellipsoidal to spherical, 23–28 × 20–26 µm in size, light brown and spiky. The parts of the species grow under the leaf and are always covered. The teleutospores are two-celled, elongated to club-shaped and 30–52 × 12–22 µm in size. They are brownish, their stems are short and also brown.
distribution
Puccinia clematidis-secalis has a distribution area that probably extends over the western Mediterranean, but it has so far only been detected in southern France.
ecology
The host plants of Puccinia clematidis-secalis are haplont clematis ( Clematis spp.) And grasses of the subfamily Pooideae 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.