Puccinia cryptandri
| Puccinia cryptandri | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia cryptandri | ||||||||||||
| Ellis & Bartholomew |
Puccinia cryptandri is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Sporobolus - sweet grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in North America .
features
Macroscopic features
Puccinia cryptandri 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 cryptandri 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 cinnamon-brown uredia of the fungus grow on the stems and on the top of the leaves of the host plant. Their yellowish to cinnamon-brown uredospores are ellipsoidal to elongated, 28–36 × 21–26 µm in size and finely spiky. The parts of the species that grow on the upper side are blackish, compact and uncovered early. The hazel-brown teliospores are one to two-celled, usually ellipsoidal to long-ellipsoidal and 38–46 × 25–30 µm in size. Their stalk is light yellowish to colorless and up to 150 µm long.
distribution
The known distribution area of Puccinia cryptandri extends from Wisconsin to northern Mexico .
ecology
The host plants of Puccinia cryptandri are Sporobolus contractus and S. cryptandrus . 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 .