Puccinia calanticariae
| Puccinia calanticariae | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia calanticariae | ||||||||||||
| Parmelee |
Puccinia calanticariae is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sunflower genus Viguiera . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in southern North America .
features
Macroscopic features
Puccinia calanticariae 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 calanticariae grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Your spermogonia grow on both sides of the host leaves. The aecia of the species, which also grow on both sides, are cinnamon-brown and form groups with the spermogonia. They have 27–30 × 19–25 µm in size, cinnamon-brown and egg-shaped to ellipsoidal aeciospores with a warty surface. The uredia of the mushroom, growing on both sides, are cinnamon brown and scattered. Their uredospores are similar to the aeciospores. The parts of the species growing on the underside of the leaf or sometimes on stems are black-brown and uncovered. The deep chestnut-brown teliospores are two-celled, usually broadly ellipsoid and 34–46 × 22–28 µm in size. Their stem is colorless and up to 200 µm long.
distribution
The known distribution area of Puccinia calanticariae extends from Arizona to Mexico City .
ecology
The host plants of Puccinia calanticariae are different Viguiera species. 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 .