Curvularia microspora Y. Liang, K.D. Hyde, J. Bhat & Yong Wang

Liang, Yin, Ran, Shuang-Fei, Bhat, Jayarama, Hyde, Kevin D., Wang, Yong & Zhao, De-Gang, 2018, Curvulariamicrospora sp. nov. associated with leaf diseases of Hippeastrumstriatum in China, MycoKeys 29, pp. 49-61 : 51-53

Curvularia microspora Y. Liang, K.D. Hyde, J. Bhat & Yong Wang sp. nov. Figure 2

Diagnosis.

Characterised by producing four celled, smaller conidia (4.5-11.5 × 2-6 µm), usually curved at the third cell from the base.

Type.

China, Chongqing City, Nanchuan, from leaf spots of Hippeastrum striatum , 28 September 2016, Y. Liang, HGUP 6272, holotype, ex-type living culture GUCC 6272.

Description.

Symptoms on Hippeastrum striatum : Fructification mostly epiphyllous, disease spot 3-12 mm, subspherical to oblong ovate, brown to dark brown, effuse (Figure 2a, b). Symptoms on Canna indica : Fructification of the fungus was mostly epiphyllous, the large blighted, irregular spots near leaf apex to the whole leaves, greyish-brown (Figure 2c).

Colonies on PDA, vegetative hyphae septate, branched, subhyaline to brown, smooth to asperulate, 1.5-3 µm, anastomosing. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Conidiophores 10.5-77.5 × 1-3.5 µm (av. = 22.2 × 2.1 µm, n = 30), arising singly, simple or branched, flexuous, septate, geniculate at spore bearing part, pale brown, dark brown, paler towards apex. Percurrent proliferation only observed occasionally. Conidiogenous loci somewhat thickened and darkened, spores up to 0.8-1 µm diam, smooth. Mature conidia always four celled, 4.5-11.5 × 2-6 µm (av. = 8.2 × 3.8 µm, n = 50), smooth-walled, usually curved at the third cell from the base, sometimes straight, navicular, bifurcate, obpyriform, tapering towards rounded ends, pale brown to dark reddish brown. Hilum usually conspicuous or sometimes slightly protuberant.

Habitat and distribution.

Isolated from leaf diseases of H. striatum and Canna indica in China

Etymology.

microspora , referring to this species producing obviously smaller conidia.

Other material examined.

China, Chongqing City, Nanchuan, from leaf diseases of H. striatum , 28 September 2016, Y. Liang (HGUP 6273), living culture GUCC 6273; China, Chongqing City, Nanchuan, from leaf diseases of H. striatum , 28 September 2016, Y. Liang (HGUP 6274), living culture GUCC 6274; China, Chongqing City, Nanchuan, from leaf diseases of H. striatum , 28 September 2016, Y. Liang (HGUP 6275), living culture GUCC 6275; China, Chongqing City, Nanchuan, from leaf diseases of H. striatum , 28 September 2016, Y. Liang (HGUP 6276), living culture GUCC 6276; China, Chongqing City, Nanchuan, from leaf diseases of H. striatum , 28 September 2016, Y. Liang (HGUP 6277), living culture GUCC 6277; China, Chongqing City, Nanchuan, from leaf diseases of H. striatum , 28 September 2016, Y. Liang (HGUP 6278), living culture GUCC 6278; China, Chongqing City, Nanchuan, from leaf diseases of Canna indica , 28 September 2016, Y. Liang (HGUP 6279), living culture GUCC 6279; China, Chongqing City, Nanchuan, from leaf diseases of C. indica , 28 September 2016, Y. Liang (HGUP 6280), living culture GUCC 6280.