Puccinia chrysopogi
| Puccinia chrysopogi | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia chrysopogi | ||||||||||||
| Barclay |
Puccinia chrysopogi is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite of Jasminum and Chrysopogon - and Themeda - grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in Southeast Asia.
features
Macroscopic features
Puccinia chrysopogi 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 chrysopogi grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The aecia of the species have 23–28 × 23–28 µm large, spherical aeciospores with a wrinkled surface. The yellow uredia of the species usually grow on the underside of the leaves of the host plant and often flow into one another. Their colorless to yellowish uredospores are usually spherical to ellipsoidal, 24–30 × 20–23 µm in size and finely spiky. The bilateral growing parts of the species are black-brown, powdery and uncovered early. The dark golden to light hazelnut brown teliospores of the fungus are two-celled, horizontally to vertically septate, usually broad to elongated ellipsoid and 42–52 × 24–32 µm in size. Their stem is colorless and up to 140 µm long.
distribution
The known distribution area of Puccinia chrysopogi includes Burma and India .
ecology
The host plants of Puccinia chrysopogi are for the Haplonts jasmine species and sweet grasses of the genera Chrysopogon and Themeda for the dikaryote . 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 with Telien, Uredien, Spermogonia and Aecien and changes host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin 1971, ISBN 3-540-05336-0 .