Puccinia batesiana
| Puccinia batesiana | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia batesiana | ||||||||||||
| Arthur |
Puccinia batesiana is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the garden sun's eye . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in the north of the USA .
features
Macroscopic features
Puccinia batesiana 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 batesiana 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 predominantly underside of the leaf growing Aecia of the species are short and stand in small groups. They have 17–22 × 14–20 µm in size, spherical to broadly ellipsoidal and hyaline aeciospores with a warty surface. The fungus does not develop uredia . The parts of the species growing underneath the leaves are black-brown, grouped and covered, they have brownish paraphyses . The deep golden to chestnut brown teliospores are two-celled, usually cylindrical and 40–60 × 12–17 µm in size. Their stalk is yellowish to light brown and up to 25 µm long.
distribution
The known distribution area of Puccinia batesiana extends from Nebraska to Maryland .
ecology
The host plant of Puccinia batesiana is Heliopsis helianthoides . 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, aecia and telia, but does not change host.
Taxonomy
The species was first described in 1901 by Joseph Charles Arthur .
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .