Mycological Progress

, Volume 18, Issue 1–2, pp 215–228 | Cite as

Taxonomic revision of the biotechnologically important species Penicillium oxalicum with the description of two new species from acidic and saline soils

  • Alena Kubátová
  • Martina Hujslová
  • Jens C. Frisvad
  • Milada Chudíčková
  • Miroslav KolaříkEmail author
Original Article


Penicillium oxalicum is a frequently isolated fungus exhibiting a wide range of physiological activities that are of relevance in agriculture, biotechnology, food quality assessments, and medicine. Although widely studied, this fungus is usually identified on the basis of morphological characters but its taxonomy has never been systematically revised. In this study, we revised a set of Penicillium isolates from various sources including P. oxalicum-like strains obtained from acidic and saline soils in the Soos Nature Reserve (Czech Republic). Two phylogenetic sister species of Penicillium oxalicum are illustrated and described as Penicillium diatomitis sp. nov. (CCF 3904T) and Penicillium soosanum sp. nov. (CCF 3778T). Both species can be distinguished from P. oxalicum based on molecular data, morphological characters, and extrolite profiles. Penicillium diatomitis mimics P. oxalicum by its macro- and micromorphology but acid production on CREA distinguishes between the two.


Soil fungi Extreme habitats Biotechnology Penicillium subgenus Aspergilloides Dierckx Section Lanata-Divaricata Thom 



BIOCEV – Biotechnology and Biomedicine Center of the Academy of Sciences and Charles University No. CZ.1.05/1.1.00/02.0109, from the European Regional Development Fund in the Czech Republic. We thank Dr. Miroslav Hyliš for technical assistance with scanning electron microscopy. We also thank to anonymous reviewers for the valuable comments.

Supplementary material

11557_2018_1420_MOESM1_ESM.pdf (314 kb)
Fig. S1 Maximum-likelihood phylogenetic tree summarizing the variability of P. oxalicum TUB2 sequences deposited in NCBI GenBank database. (PDF 313 kb)
11557_2018_1420_MOESM2_ESM.pdf (363 kb)
Fig. S2 Penicillium asturianum (CCF 2062T). a Colonies on CYA after 7 days at 25 °C. b Colonies on MEA after 7 days at 25 °C. c Colonies on CYA after 7 days at 37 °C. d Colonies on CREA after 7 days at 25 °C. e, f Conidiophores. g Conidia. h Conidia, SEM. Scale bars: e–f = 10 μm; g = 5 μm; h = 2 μm. (PDF 362 kb)


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Copyright information

© German Mycological Society and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Botany, Faculty of ScienceCharles UniversityPraha 2Czech Republic
  2. 2.Laboratory of Fungal BiologyInstitute of Microbiology of the Czech Academy of SciencesPraha 4Czech Republic
  3. 3.Department of Biotechnology and BiomedicineTechnical University of DenmarkLyngbyDenmark
  4. 4.Laboratory of Fungal Genetics and MetabolismInstitute of Microbiology of the Czech Academy of SciencesPraha 4Czech Republic

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