Puccinia croci
| Puccinia croci | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia croci | ||||||||||||
| Gäumann & Terrier |
Puccinia croci is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of various crocuses . Symptoms of the infestation by the species are rust spots on the leaves of the host plants. Their distribution area includes the European western Alps .
features
Macroscopic features
Puccinia croci can only be recognized with the naked eye by the spore beds protruding on the surface of the host. They grow in nests that appear as rust-brown spots on the leaf surfaces.
Microscopic features
The mycelium of Puccinia Croci growing intercellular like all exobasidium and forms Saugfäden that grow into the storage tissue of the host. The parts of the kind are small, round and dense and usually grow on the inside of the leaves. They are surrounded by partition walls made of paraphyses that can be up to 100 µm high. The teleutospores are always two-celled, elongated to long club-shaped and 27–62 × 14–27 µm in size; at the apex its walls are 4–10 µm thick. The stem is hyaline and short, measuring 10–20 µm.
distribution
The species area of Puccinia croci includes the Welstalpen.
ecology
The host plants of Puccinia croci are various crocuses ( Crocus spp.). 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 of which only the parts are known, it has not been explored in detail.
literature
- Ernst Gäumann: The rust fungi of Central Europe. With special consideration of Switzerland (= contributions to the cryptogam flora of Switzerland), Volume XII. Commission publisher Buchdruckerei Büchler & Co, Bern 1959.