Two Unrecoreded Species Belonging to Penicillium Section Exilicaulis in South Korea

Myung Soo Park¹ Sung Hyun Kim¹ Jun Won Lee¹ Ji Seon Kim¹ Yoonhee Cho¹ Young Woon Lim^1,*

¹School of Biological Sciences and Institute of Microbiology, Seoul National University, Seoul 08826,Korea

Abstract

Penicillium in section Exilicaulis is characterized by non-vesiculate monoverticillate and biverticillate stipes. Species in sect. Exilicaulis are commonly found in soil and plants in terrestrial environments; however, only a few species have been reported in Korea. To investigate the diversity of Penicillium sect. Exilicaulis, Penicillium species were isolated from terrestrial and marine environments. Based on sequence analyses of β-tubulin, calmodulin, and the second largest subunit of RNA polymerase II loci, 19 strains of Penicillium in sect. Exilicaulis were identified as P. citreonigrum, P. citreosulfuratum, P. corylophilum, P. menonorum, P. rubefaciens, P. velutinum, Penicillium sp. 1, and Penicillium sp. 2. Two of them, P. citreonigrum and P. citreosulfuratum, were confirmed to be new to Korea. Molecular phylogenies and detailed descriptions of the two unrecorded species are provided.

Figures & Tables

Fig. 1. Maximum likelihood phylogenetic tree of the combined data set of , , and gene sequences used to identify strains to the species level in section . Bootstrap scores of >70 are presented at the nodes. The scale bar indicates the number of nucleotide substitutions per site. “T” indicates the ex-type strains. Strains reported in the current study are represented in bold. The species labeled in blue represent previously unrecorded species in South Korea. The names in red are potential new species.