Puccinia pugiensis
| Puccinia pugiensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia pugiensis | ||||||||||||
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Puccinia pugiensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of Saccharum spontaneum . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. She is endemic to China .
features
Macroscopic features
Puccinia pugiensis can only be recognized with the naked eye by means of the spore beds emerging 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 pugiensis 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 the underside and partly on cladding tubes. Their subhyaline to yellowish uredospores are spherical to pear-shaped, 27–29 × 17–24 µm in size and finely spiky. The underside growing parts of the species are black-brown, exposed early and compact. The cinnamon-brown teliospores are two-celled, usually ovate to broadly ellipsoidal or oblong and 36–56 × 14–21 µm in size; their stalk is brown and up to 140 µm long.
distribution
The known distribution area of Puccinia pugiensis only includes the Chinese Kunming .
ecology
The host plant of Puccinia pugiensis is Saccharum spontaneum . 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 et al. 1971, ISBN 3-540-05336-0 .