Fungalpedia – Note 673, Aldonata
Aldonata Racib., Parasit. Alg. Pilze Java’s (Jakarta) 1: 19 (1900).
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank., Fig. 1,2.
Classification: Parmulariaceae, Asterinales, Dothideomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Parasitic on the upper leaf surface appearing as leaf spots Leaf spots solitary to scattered, sometimes confluent, cicular to irregular in shape, greyish-white, edge diffuse. Sexual morph: Ascomata semi-immersed, globose to subglobose, black, shiny, appearing as flexuous lines on the leaf spot surface with a clearly-defined margin. Peridium 1-layered, composed of poorly-defined brown to black cells. Hamathecium compose of transverse septate, long, colourless, branched, pseudoparaphyses. Asci 8-spored, bitunicate, clavate to broadly clavate, pedicellate, thin-walled. Ascospores multiseriate, ellipsoid to fusiform, muriform, hyaline, with up to 8 transverse and longitudinal septa, lower cell narrows and longer, caudi- form. Asexual morph: Conidiomata solitary to gregarious, sub-immersed, black and shiny, carbonaceous, glo- bose to irregular, mostly growing around the central of grayish-white spot. Peridium composed of hyaline cells of textura angularis. Conidiophores reduced to conid- iogenous cells, arising from basal cells of inner peridium wall, Conidiogenous cells hyaline, integrated. Conidia aseptate, fusiform to cylindrical, hyaline, tapering at both ends, smooth-walled (Tian et al. 2016).
Notes: Sivanesan and Sinha (1989) introduced Aldonata pterocarpi to accommodate Aldonata. Aldonata differs from Aldona in having much larger locules and muriform ascospores Inácio and Cannon (2008) placed Aldonata in Parmulariaceae (Tian et al. 2016). The gray- ish-white margins of A. pterocarpi described Inácio and Minter (2002), are identical to the cream-coloured margins of Aldona stella-nigra (Inácio and Minter 2002). Tian et al. (2016) re-examined the holotype of Aldonata pterocarpi and described the sexual and asexual morphs with illustrations.
Type species: Aldonata pterocarpi Sivan. & A.R.P. Sinha, Mycol. Res. 92(2): 249 (1989)
Other accepted species: species Fungorum – search Aldonata.
Figure 1 – Aldona stella-nigra. a Ascoma on yellowish leaf spot. b Ascus. c Ascospores. d Conidiomata. e Conidiog- enous cells. f Conidia. Scalebars: b, c = 20 µm, e, f = 10 µm. Redrawn from Tian et al. (2016)
Figure 2 – Aldonata pterocarpi.a Ascomata. b Ascus. c Ascospore. d Pycnidia. e Conid- iogenous cell. f Conidia. Scale bars: a = 100 µm, b, c = 20 µm,d = 200 µm. e, f = 5 µm. Redrawn from Tian et al. (2016)
References
Inácio CA, Minter DW 2002 – IMI Descriptions of Fungi and Bacteria 145 (1445).
Entry by
Diana Sandamali Marasinghe, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai, 50150, Thailand
Published online 29 August 2023