Japanese Fungi on Plants No.61 before next top

Setosphaeria rostrata Leonard [=Exserohilum rostratum (Drechsler) Leonard & Suggs]
Classification: Ascomycota, Locuoascomycetes, Dothideales, Pleosporaceae

Distributed mainly south from Kanto, the central part of Japan. Often isolated as an leaf inhabitant on grasses, and also reported as a plant pathogen on warm season grasses. Disperses by scattering conidia. Teleomorph has never been observed in nature.

Characteristics: Leaf inhabitant, Plant pathogen

Morphology:
 Teleomorph: Produced by paired culture on artificial media. Producing cylindrical to clavate asci in black pseudothecia with setae around the beak. Ascospores hyaline to light brown, fusiform, constricted at the septa, 29-85 x 9-21 um produced in asci.
 Anamorph: On olive brown conidiophores,  producing conidia straight or curved, olive brown to brown, oblong to narrowly obclavate, hilum protrudent at the base, 15-200 x 7-29 um, with -18 pseudosepta.

Conidia

Herbarium specimen in NIAES

Specimen No. Scientific name Host name Host scientific name Symptoms Geographical origin Collected date Collector
135-1-15 Exserohilum rostratum Panicum Panicum sp.  leaf spot (indistinct) Ishigaki, Okinawa 2002.2.18 Tsukiboshi, T.

(Described by Tsukiboshi, T., NIAES, Microbial Systemtics Lab., 2002)


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