Talaromyces albisclerotius B.D. Sun, A.J. Chen, Houbraken & Samson, B. D. Sun, A. J. Chen, Houbraken & Samson, 2020

Sun, Bing-Da, Chen, Amanda J., Houbraken, Jos, Frisvad, Jens C., Wu, Wen-Ping, Wei, Hai-Lei, Zhou, Yu-Guang, Jiang, Xian-Zhi & Samson, Robert A., 2020, New section and species in Talaromyces, MycoKeys 68, pp. 75-113: 75

publication ID

http://dx.doi.org/10.3897/mycokeys.68.52092

persistent identifier

http://treatment.plazi.org/id/6F3414A0-09C1-57DE-B5A0-A1BC48EF98A4

treatment provided by

MycoKeys by Pensoft

scientific name

Talaromyces albisclerotius B.D. Sun, A.J. Chen, Houbraken & Samson
status

sp. nov.

Talaromyces albisclerotius B.D. Sun, A.J. Chen, Houbraken & Samson   sp. nov. Fig. 6 View Figure 6

Typus.

China, Xinjiang, soil, 2002, isolated by L. Cai, Holotype CBS H-22837, culture ex-holotype CBS 141839 = DTO 340-G5.

ITS barcode.

MN864276. Alternative identification markers: BenA = MN863345, CaM = MN863322, RPB2 = MN863334.

Diagnosis.

Talaromyces albisclerotius   produces white sclerotia on OA, grows restrictedly on CYA, YES, DG18 and OA and does not grow on CYAS.

In.

Talaromyces section Trachyspermi  

Colony diam, 7 d (mm).

CYA 5-8; CYA 30 °C 3-4; CYA 37 °C No growth; MEA 19-20; MEA 30 °C 8-9; OA 13-14; YES 6-7; CREA No growth; CYAS No growth; DG18 5-6.

Colony characters.

CYA 25 °C, 7 d: Colonies moderately deep, slight sulcate; margins entire; mycelium white; texture floccose; sporulation dense; conidia en masse greyish yellow-green (68); soluble pigments absent; exudates absent; reverse buff (45). MEA 25 °C, 7 d: Colonies moderately deep, sulcate; margins entire; mycelium white and primrose (66); texture floccose; sporulation dense; conidia en masse pistachio green (92); soluble pigments absent; exudates absent; reverse ochreous (44). YES 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium white; texture floccose; sporulation moderately dense; conidia en masse pistachio green (92); soluble pigments absent; exudates absent; reverse buff (45). DG18 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium sulphur yellow (15); texture floccose; sporulation sparse; conidia en masse greyish yellow-green (68); soluble pigments absent; exudates absent; reverse sulphur yellow (15). OA 25 °C, 7 d: Colonies moderately deep, plane; margins entire; mycelium white and primrose (66); texture velvety; sporulation dense; conidia en masse yellow green (71); soluble pigments absent; exudates clear droplets; reverse greyish yellow-green (68). CREA 25 °C, 7 d: No growth.

Micromorphology.

Conidiophores biverticillate, with a minor proportion having subterminal branches; stipes smooth, 70-130 × 3-4 μm, extra branches 10-20 μm; metulae 3-5, divergent, 8.5-11 × 4-4.5 μm; phialides 4-6, acerose, 9-11 × 3-5 μm; conidia smooth, subglobose to fusiform, 2-4.5 × 3-4 μm. Ascomata not observed, white sclerotia present on OA after 1 wk.

Notes.

Talaromyces albisclerotius   is characterized by the production of white sclerotia on OA after 1 wk incubation; these sclerotia remain sterile and no ascospores are observed after prolonged incubation up to eight wk. Talaromyces assiutensis   and T. trachyspermus   could produce white ascomata, but their ascomata mature after weeks and release ascospores ( Yilmaz et al. 2014). Phylogenetically, T. albisclerotius   clusters with T. diversus   and T. brasiliensis   , but T. diversus   grows faster on MEA, and T. brasiliensis   produces rough conidia ( Yilmaz et al. 2014; Barbosa et al. 2018).

Etymology.

Latin, albisclerotius   , refers to its white sclerotia produced on OA.