Penicillium glabrum

Colonies on agar Chapek fast-growing, in 7 days reach a diameter of 4-5 cm, velvety. Sporulation is dark green. Reverse yellow to yellow-orange; sometimes colorless to brownish exudate and yellow soluble pigment are secreted.

Conidiophores are single-tier, smooth-walled to barely rough, 50-100 microns long and 3-3.5 microns thick, swollen at the apex. Phialides in bundles of 10-16, flask-like, 8-12 × 3-3.5 microns. Conidia are spherical to almost spherical and widely elliptic, smooth to barely rough, 3–3.5 μm in diameter.

Differences from close species

Penicillium frequentans , with which it previously combined, is very close. The latter is distinguished by a yellow-brown reverse on CYA at 27-30 ° C, while in P. glabrum the color of the reverse on this medium is beige-brown, with less warm tones. P. glabrum usually grows somewhat faster on CYA at 30 ° C. P. glabrum synthesizes citromycetin, fulvic acid, asteric acid, bisdechlorheodyne, geodyne, sulokhrin.

A widespread species distributed in acidic soils, on cereal plants and grain, on food products.

Nephrotoxin producer of citromycetin .

Penicillium glabrum ( Wehmer ) Westling ,Ark. Bot. 11 (1): 131 (1911). - Citromyces glaber Wehmer , Beitr. Kenntn. Einh. Pilze 1: 24 (1893).

Synonyms

• Citromyces glaber Wehmer, 1893
• Citromyces pfefferianus Wehmer, 1893
• Penicillium aurantiobrunneum Dierckx , 1901
• Penicillium flavidorsum biourge , 1923
• Penicillium fluitans Tiegs , 1919
• Penicillium oledzkii K. Zaleski , 1927
• Penicillium pfefferianum (Wehmer) Westling, 1911
• Penicillium spinuloramigenum Y.Sasaki ex C. Ramírez , 1982
• Penicillium terlikowskii K. Zaleski, 1927

• Houbraken J., Visagie CM, Meijer M. et al. A taxonomic and phylogenetic revision of Penicillium section Aspergilloides // Studies in Mycology. - Vol. 78. - P. 373-451. - DOI : 10.1016 / j.simyco.2014.09.09.002 .
• Samson RA, Hoekstra ES, Frisvad JC Introduction to food- and airborne fungi. - 2004 .-- P. 214.