Penicillium glabrum cork colonising isolates - Preliminary analysis of their genomic similarity

Maria Carmo Basílio, Ricardo Gaspar, Cristina Silva Pereira, Maria Vitória San Romão

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The cork stopper manufacturing process includes an operation, known as stabilisation, by which humid cork slabs are extensively colonised by fungi. The effects of fungal growth on cork are not completely understood although they are considered to be involved in the so-called "cork taint" of wine. It is essential to (a) identify environmental constraints which define the appearance of the colonising fungal species and (b) trace their origin to the forest and/or the manufacturing space. The present article correlates two sets of data, from consecutive years and the same season, of systematic sampling of two manufacturing units, located in the North and South of Portugal. Chrysonilia sitophila dominance was confirmed, followed by a high diversity of Penicillium species. Penicillium glabrum, which was found in all samples, was the most frequently isolated species. P. glabrum intra-species variability was investigated using DNA fingerprinting techniques revealing highly discriminative polymorphic markers in the genome. Cluster analysis of P. glabrum data was discussed in relation to the geographical location of strains, and results suggest that P. glabrum arise from predominantly the manufacturing space, although cork specific fungi can contribute.

Original languageEnglish
Pages (from-to)151-154
Number of pages4
JournalRevista Iberoamericana de Micologia
Volume23
Issue number3
DOIs
Publication statusPublished - Sep 2006

Keywords

  • Cork
  • DNA fingerprint
  • Fungal genomic similarity
  • Penicillium glabrum

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