Dothideomycetes » Dothideomycetes, genera incertae sedis » Asterinema

Asterinema caseariae

Asterinema caseariae Bat. & Gayão, Anais IV Congr. Soc. bot. Brasil: 160 (1953)                                                          Fig. 1

 

Index Fungorum number: IF 293427; Facesoffungi number: FoF 06211

 

Biotrophic or parasitic on living leaves. Colonies 130–311 µm wide, 130–275 µm high (x̅ = 220 × 210 µm, n = 10), forming roundish to irregular blackened blotches, sometimes in groups. Sexual morph: Thyriothecia 75–48 μm high × 105–320 μm diam., circular with irregular margin, solitary or gregarious, semi-immersed to superficial, carbonaceous, and black. Peridium 6–10 μm thick, comprising several layers of compressed, brown-black, 3–4 μm broad cells of textura angularis. Hamathecium sparse, hyaline, 1.5 μm broad, septate or nonseptate, long pseudoparaphyses inclined towards the center. Asci 50–100 μm × 10–16 μm (x̅ = 80 × 12 μm, n = 15), 8-spored, bitunicate, fissitunicate, obclavate, with a short pedicel. Ascospores 16–20 μm × 6–7 μm (x̅ = 17 × 6.8 μm, n = 10), biseriate, hyaline, oblong to broadly ellipsoid or subclavulate, guttulate, slightly constricted at the septum, wall minutely roughened upper cell wider and shorter than the lower cell. Asexual morph: Undetermined.

 

Material examined – BRAZIL, on leaves of Casearia sp. (Flacourtiaceae), 30 September 1955, K. P. Dumont (NY00914016, holotype).

 

Economic significance – The genus Asterinema comprises foliicolous fungi or leaf inhabiting fungi that manisfests as black and brown mildew, powdery mildew, smuts and rusts on wide range of hosts (Ali Ganie 2010).

 

 

Figure 1 – Asterinema caseariae (NY00914016, holotype). a–b Herbarium specimen and habit on leaf. c, d Appearance of ascomata on leaf surface. e Section of ascoma. f Peridium. g Asci entangled in pseudoparaphyses. h–j Asci. k–m. Ascospores. Note: i, l stained in lactophenol cotton blue. Scale bars: c, d = 500 μm, e = 100 μm, f, k–m = 10 μm, g = 50 μm, h–j = 20 μm.

 

References

 

Ali Ganie A. 2010 – Studies on Foliicolous fungi associated with some plants. Dissertation available online at

https://pdfs.semanticscholar.org/0ecd/0a3cc93161913e16c252c6723df59db746d6.pdf (Accessed 24 May 2019)

 

 

Recent News

Recent paper to be published

Recent Genus

Neomedicopsis
Boeremia
Gangamyces

Recent Species

Leveillina arduinae
Euryachora sedi
Didymellina iridis