Puccinia inaequata
| Puccinia inaequata | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia inaequata | ||||||||||||
| Jackson & Holway |
Puccinia inaequata is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of sham asters . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in South and Central America .
features
Macroscopic features
Puccinia inaequata can only be recognized with the naked eye by means of the spore beds emerging 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 inaequata grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow on the upper side of the host leaves. The aecia of the species, which also grow on the top of the leaves, are cinnamon-brown and stand around the spermogonia. Their hyaline aeciospores are 23–26 × 18–21 µm in size, ovate to broadly ellipsoidal and warty. The uredia growing on both sides of the mushroom are scattered and cinnamon brown. The light golden to colorless uredospores are 23–26 × 18–21 µm in size, broadly ellipsoidal to ovate and spiky. The bilateral growing parts of the species are black-brown, powdery and uncovered. The light chestnut brown teliospores are two-celled, usually broad ellipsoid to long ellipsoid, wrinkled and usually 33–38 × 22–25 µm in size. Their stem is colorless and up to 50 µm long.
distribution
The known distribution area of Puccinia inaequata extends from South America to Guatemala .
ecology
The host plants of Puccinia inaequata are various sham asters ( Vernonia spp.). 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 macrocyclical development cycle with Spermogonia, Aecien, Telien and Uredien. As an auto-ecologic parasite, it 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 .