Puccinia massalis
| Puccinia massalis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia massalis | ||||||||||||
| Arthur |
Puccinia massalis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Helianthus ciliaris . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in the southern United States .
features
Macroscopic features
Puccinia massalis 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 massalis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow on stems and on both sides of the host leaves. The aecia of the species growing on both sides of the leaf veins and stems are cylindrical and white to yellowish. They have 22–30 × 18–22 µm in size, hyaline and spherical to elongated aeciospores with a warty surface. The uredia growing on both sides of the mushroom are cinnamon brown. Their cinnamon-brown uredospores are 26–35 × 19–23 µm in size, ovate to ellipsoidal and spiky. The bilateral growing parts of the species are black-brown, powdery and uncovered. The chestnut-brown teliospores are two-celled, usually ellipsoidal to broadly ellipsoidal and 42–48 × 25–30 µm in size. The stem is colorless to yellowish and up to 175 µm long.
distribution
The known distribution area of Puccinia massalis includes New Mexico and Texas .
ecology
The host plant of Puccinia massalis is Helianthus ciliaris . 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 goes through a development cycle with Spermogonia, Aecien, Telien and Uredien, but does not change host.
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .