Puccinia esclavensis
| Puccinia esclavensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia esclavensis | ||||||||||||
| Dietel & Holway |
Puccinia esclavensis is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of miracle flowers and various sweet grasses . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It occurs in large parts of tropical America.
features
Macroscopic features
Puccinia esclavensis can only be recognized with the naked eye by 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 esclavensis grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. The cylindrical aecia of the species have 21–28 × 16–19 µm large hyaline aeciospores with a wrinkled surface. The cinnamon-brown uredia of the fungus grow on the underside of the host leaves. Their golden uredospores are 26–33 × 19–23 µm in size, narrowly ovate to broadly ellipsoidal and wrinkled. The parts of the species growing underneath the leaves are black-brown, powdery and exposed early; they are up to 5 mm long. The chestnut-brown teliospores are one to two-celled, usually ellipsoidal and 28–36 × 22–27 µm in size. Their stalk is yellowish and up to 80 µm long.
distribution
The well-known distribution area of Puccinia esclavensis extends from the southwest USA over the Caribbean to Honduras , Ecuador and Argentina .
ecology
The host plants of Puccinia esclavensis are for haplonts magic flowers ( Mirabilis spp.) And Panicum bulbosum , Pa. plenum , Pennisetum chilense , Pe. bamboo shapes and pe. peruvianum 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, Aecien and Spermogonia and changes host.
literature
- George Baker Cummins: The Rust Fungi of Cereals, Grasses and Bamboos . Springer, Berlin et al. 1971, ISBN 3-540-05336-0 .