Amphisphaeriales » Sporocadaceae » Pestalotiopsis

Pestalotiopsis aggestorum

Pestalotiopsis aggestorum F. Liu & L. Cai Scientific Reports 7 (no. 866): 4 (2017).

Index Fungorum number: IF 818920        Facesoffungi number: FoF05991

 

Conidiomata pycnidial in culture on PDA, globose or clavate, aggregated or scattered, semi-immersed to erumpent, dark brown to black, 100–600 μm diam; exuding globose, dark brown to black conidial masses. Conidiophores reduced to conidiogenous cells; conidiogenous cells discrete or integrated, ampulliform, clavate or subcylindrical, hyaline, smooth, 6–14.7 × 2–5.5 μm. Conidia fusoid, ellipsoid, straight to slightly curved, 4-septate, 19–24.5 × 5–7 μm (av. ± SD = 21.5 ± 1.5 × 6.2 ± 0.6 μm); basal cell conic or obconic with a truncate base, hyaline, rugose and thin-walled, 2–5.5 μm long; three median cells doliiform, 11.5–16 μm (av. ± SD = 13.5 ± 0.9 μm) long, wall minutely verruculose, versicoloured, septa darker than the rest of cell (second cell from base pale brown, 3.5–5.5 μm long; third cell darker brown, 3.5–5.5 μm long; fourth cell brown, 4.5–6 μm long); apical cell 3.5–6.5 μm long, hyaline, obconic with a truncate base or subcylindrical, thin-walled, slightly rugose; with 2–3 tubular apical appendages (mostly 3), arising from the apical crest, unbranched (rarely branched), filiform, 18–28 μm; basal appendages 1–2, tubular, occasionally branched, centric, 5–14 μm long.

 

Culture characteristics: Colonies on PDA attaining 72 mm diam after 7 d at 25 °C, with entire edge, whitish, with dense aerial mycelia on the surface with black, gregarious conidiomata; reverse whitish in colour.

 

Habitat: on leaves of terraced tea Camellia sinensis (Liu et al. 2017), and an unknown host (Hyde et al. 2019).

 

Known distribution: China (Liu et al. 2017), Thailand (Hyde et al. 2019). 

 

Material examined: CHINA, Yunnan Province, Xishuangbanna, Jingmai Mountain, on leaves of terraced tea Camellia sinensis, 16 Apr. 2015, F. Liu, HMAS 247058 (holotype), ex-holotype living culture CGMCC 3.18159 (= LC6301); ibid. LC8186; ibid. LC8187.

 

GenBank Accession No: LSU=KX895129, ITS= KX895015, TUB= KX895348, TEF= KX895234

 

Notes: Pestalotiopsis aggestorum is phylogenetically most closely related to P. colombiensis and P. jinchanghensis. However, the former species differs from P. colombiensis in the length of basal appendages (5–14 μm vs. 2–5 μm); differs from P. jinchanghensis in producing relatively shorter conidia (19–24.5 × 5–7 μm, av. = 21.5 μm vs. 21–30 × 5–7 μm, av. = 25.5 μm).

Figure X. Pestalotiopsis aggestorum (from ex-holotype culture CGMCC 3.18159 (= LC6301)). (A) Conidiomata sporulating on pine needle. (B) Conidiomata sporulating on PDA. (C–E) Conidiogenous cells and conidia. (F–K) Conidia. Scale bars = 10 μm.

 

References:

Hyde KD, Tennakoon DS, Jeewon R et al. (2019) Fungal diversity notes 1036–1150: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Divers 96: 1–242.

Liu F, Hou L, Raza M et al. (2017) Pestalotiopsis and allied genera from Camellia, with description of 11 new species from China. Sci Rep 7, 866.

 

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