Aecidium ivae

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Aecidium ivae
Systematics
Subdivision : Pucciniomycotina
Class : Pucciniomycetes
Order : Rust mushrooms (Pucciniales)
Family : insecure position (incertae sedis)
Genre : Aecidium
Type : Aecidium ivae
Scientific name
Aecidium ivae
HS Jacks.

Aecidium IvAe is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is an endoparasite of the daisy family Iva frutescens . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in southeastern North America . Since only its secondary crop form is knownso far, it is classified in the genus Aecidium .

features

Macroscopic features

Aecidium ivae 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 Aecidium IvAe grows as with all Aecidium TYPES intercellular and forms Saugfäden that grow into the storage tissue of the host. Its spermogonia grow on both sides of the host leaves. The aecia of the species growing underneath the leaves are brownish yellow and cup-shaped. Their hyaline aecidiospores are 26–33 × 21–29 µm in size, mostly spherical and warty. The uredia of the mushroom are not known, and it is possible that they are not developed. The Telien the type have not been observed to date.

distribution

The known distribution area of Aecidium ivae extends from Delaware to Louisiana .

ecology

The host plant of Aecidium ivae is Iva frutescens . 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 micro- or macrocyclical development cycle with spermogonia, aecia, possibly also uredia and telia. Whether she is going through a change of host cannot be determined due to the lack of telien and uredien.

literature