Puccinia digraphidis
| Puccinia digraphidis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia digraphidis | ||||||||||||
| Soppitt |
Puccinia digraphidis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of berries , white sausages , shade flowers , convallaria and glossy grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. The distribution area includes a Holarctic area.
features
Macroscopic features
Puccinia digraphidis 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 spots and pustules on the leaf surfaces.
Microscopic features
The mycelium of Puccinia digraphidis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your pyknia are orange in color and grow on both sides of the leaf. The aecia grow in a circle on yellow discolored spots. They have spherical to egg-shaped aecidiospores of 18–24 × 17–24 µm , which are hyaline and finely warty. The uredia grow on both sides and lift the epidermis . Their uredospores are usually spherical, rarely ellipsoid, 25–28 × 24–27 µm in size, brown and slightly spiky. The parts of the species are rounded or line-shaped. The teleutospores are two-celled, variably shaped and 30–60 × 12–22 µm in size; their stem is short or absent.
distribution
The distribution area of Puccinia digraphidis covers the entire northern hemisphere.
ecology
The host plants of Puccinia digraphidis are Haplont berries , Weisswurzen , shade flowers and Convallaria spp. as well as glossy grasses 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.