Sphaerellopsis filum (Japanese Fungi on Plants)

Japanese Fungi on Plants No.62 before next top

Sphaerellopsis filum (Biv.-Bern. ex Fr.) Sutton [=Darluca filum (Biv.-Bern. ex Fr.) Berk.]
Classification: Deuteromycotina, Coelomycetes

Distributed widely in Japan and known as a hyperparasite of rust fungi. Because it produces pycnidia mainly in uredinia on various plants and restrain disease progress, the fungus sometimes used as an agent for biocontrol. Produces pycnidia in rust sori and disperses by scattering pycnidiospores inside. Teleomorph is Eudarluca caricis (Fr.) Eriks., but not yet reported in Japan.

Characteristics: Hyperparasite Pycnidia in rust uredia: JPEG (Sugarcane, rust, 150kb)

		Morphology: Teleomorph: Anamorph: Pycnidia dark brown to black, spherical, ostiolate, produced in rust sori. Pycnidiospores hyaline to pale yellow, fusoid to ellipsoid, 2-celled, 17-20 x 5.5-6.5 um, with short bristle-like appendages at both ends.
Pycnidium and pycnidiospores	Pycnidiospores

Herbarium specimen in NIAES

Specimen No.	Scientific name	Host name	Host scientific name	Symptoms	Geographical origin	Collected date	Collector
133-1-15	Darluca	Rust of Bean			ESALQ, Piracicaba,s.p.	1974.12.10	Hino, T.
142-1-28	Sphaerellopsis filum	Rust of goldenrod	Coleosporium asterum	hyperparasite	Tsukuba, Ibaraki	1991. 11. 20	Sato, T.

(Described by Tsukiboshi, T., NIAES, Microbial Systemtics Lab., 2003)