Puccinia crinitae
| Puccinia crinitae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia crinitae | ||||||||||||
| ( Cunningham ) McNabb |
Puccinia crinitae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Dichelachne critina . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to New Zealand .
features
Macroscopic features
Puccinia crinitae 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 crinitae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Aecia or spermogonia of the species are not known. The uredia of the fungus grow on both sides, mostly on the top, on the leaf surfaces of the host plant. Their light yellow uredospores are broadly ellipsoidal, 30–35 × 26–30 µm in size and finely spiky. The parts of the species that grow on the upper side are blackish, covered and compact. The hazelnut-brown teliospores are one to two-celled, usually long to cylindrical and 50–80 × 15–20 µm in size; their stem extremely short.
distribution
The known distribution area of Puccinia crinitae only includes New Zealand .
ecology
The host plant of Puccinia crinitae is Dichelachne critina . 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 Telien and Uredien and their host are known; Spermogonia and aecia could not be assigned to the fungus.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .