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United States Department of Agriculture

Agricultural Research Service

Title: Resolving the Identification of Penicillium Glabrum, P. Purpurogenum, P. Thomii and Eupenicillium Lapidosum

item Peterson, Stephen

Submitted to: Mycological International Conference Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: August 17, 2002
Publication Date: N/A

Technical Abstract: The identification of Penicillium glabrum and other closely related species presents a challenge to mycologists because of the phenotypic similarity of these species. To address this problem, DNA sequences from ITS, beta-tubulin, calmodulin and translation elongation factor 1 alpha were determined from ex type and other isolates belonging to P. glabrum, P. thomii, P. yezoense, P grancanaraie, P. baiiolum, P. palmense, P. trzebinskii, P. terlikowskii, P. purpurescens, P. viridoalbus, P. oledskii and Eupenicillium lapidosum. Prior studies showed that in the ITS region, total variation among these species is two base substitutions, although some of these species may be synonyms. Ex-type isolates of E. lapidosum and P. thomii had identical sequences in ITS, CF, EF1 and BT; P. viridoalbus and P. purpurescens were identical at 3 loci and differed by a single base at the other suggesting synonymies in each case. Penicillium spinulosum also resembles P. glabrum and is closely related. However, it is a genetically and phenotypically distinct species. The pattern of genetic variability at multiple loci suggests a complex of variable and closely related species centered on P. glabrum.

Last Modified: 4/22/2015
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