Puccinia notha
| Puccinia notha | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia notha | ||||||||||||
| Jackson & Holway |
Puccinia notha 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 Central America .
features
Macroscopic features
Puccinia notha 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 notha 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 growing underneath the leaves are cylindrical, gregarious and irregularly torn. Their hyaline aeciospores are 26–35 × 18–21 µm in size, spherical to irregularly ellipsoidal and warty. The uredia of the fungus, which grow on both sides, are small, scattered and yellow. The colorless uredospores are 28–32 × 26–29 µm in size, broadly ellipsoidal to almost spherical and spiky. The parts of the species, which predominantly grow on the upper side of the leaves, are black-brown, powdery and uncovered. The clear maroon teliospores are two-celled, usually broad ellipsoid, wrinkled and usually 40–48 × 26–32 µm in size. Its stem is yellowish to colorless and up to 90 µm long.
distribution
The well-known distribution area of Puccinia notha extends from Sinaloa to Guatemala .
ecology
The host plants of Puccinia notha 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 .