Puccinia inclusa
| Puccinia inclusa | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Puccinia inclusa | ||||||||||||
| P. Sydow & Sydow |
Puccinia inclusa is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the sunflower genus Cirsium . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in western North America .
features
Macroscopic features
Puccinia inclusa 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 inclusa grows as with all Puccinia TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia grow predominantly on the upper side of the host leaves. The aecia of the species, mostly growing on the top of the leaves, are dark cinnamon-brown and stand around the spermogonia. Their cinnamon to dark cinnamon-brown aeciospores are 23–29 × 22–27 µm in size, spherical to broadly ellipsoidal and spiky. The uredia growing on both sides of the mushroom are dark cinnamon brown. Their dark cinnamon to cinnamon brown uredospores are 23–29 × 22–27 µm in size, spherical to broadly ellipsoidal and spiky. The parts of the species that grow on both or mainly underside of the leaves are black-brown, powdery and uncovered. The chestnut-brown teliospores are two-celled, usually ellipsoidal, wrinkled and usually 35–46 × 22–27 µm in size. Their stem is colorless and up to 100 µm long.
distribution
The known distribution area of Puccinia inclusa extends from western North America to central Mexico .
ecology
The host plants of Puccinia inclusa are different species of the genus Cirsium . 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 .
Systematics
Puccinia inclusa was scientifically described in 1904 by Paul Sydow and Hans Sydow . However, Arthur regards the species as a synonym for Puccinia cirsii .
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
- ^ JC Arthur (1905) Sydow's Monographia Uredinearum, with Notes upon American Species. The Journal of Mycology 11: 6-12. Stable url