Puccinia splendens
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| Puccinia splendens | ||||||||||||
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Puccinia splendens is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite the daisy family genus Hymenoclea . 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 splendens can only be recognized with the naked eye from 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 splendens grows as with all Puccinia intercellular types, 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 growing on both sides are white and short-cylindrical to cup-shaped. They have 24–32 × 21–25 µm in size, spherical to angular ellipsoidal, colorless to yellowish aeciospores. The uredia of the fungus, which mainly grow on the underside of the leaves, are dark cinnamon brown. Their cinnamon-brown uredospores are 26–33 × 24–27 µm in size, broadly ovate to long ellipsoid and spiky. The on leaves and stems bile growing Telien the type are black brown. The chestnut-brown teliospores are two-celled, usually ellipsoidal and 44–65 × 29–35 µm in size. Their stem is colorless and up to 200 µm long.
Species delimitation
Puccinia franseriae was partially considered a synonym of Puccinia splendens . However, the former has prickly aecidiospores, the latter, however, warty aeciospores arranged in chains.
distribution
The known distribution area of Puccinia splendens extends from the southwest USA to northwest Mexico .
ecology
The host plants of Puccinia splendens are Hymenoclea salsola and H. monogyra . 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 .
Individual evidence
- ↑ George B. Cummins (1975) The Status of Three Western Rust. Mycologia 67: 175-177. Available online