Puccinia phaenospermae
| Puccinia phaenospermae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia phaenospermae | ||||||||||||
| Hino & Katumoto |
Puccinia phaeno spermae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sweet grass Phaenosperma globosum . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in East Asia .
features
Macroscopic features
Puccinia phaenospermae 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 phaeno spermae 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 usually grow on the upper side of the host leaves. Their light cinnamon-brown uredospores are 24–30 × 20–24 µm in size, ovate to ovate and finely spiky. The parts of the species that grow on the upper side are blackish and open early. The golden to light hazel-brown teliospores are two-celled, usually narrowly ovate to ellipsoidal and 40–50 × 16–20 µm in size. Their stem is golden brown and up to 60 µm long.
distribution
The known distribution area of Puccinia phaenospermae includes China and Japan .
ecology
The host plant of Puccinia phaenospermae is Phaenosperma globosum . 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 .