Analysis of Phylogenetic Relationships Between Low-Density Polyethylene-Oxidizing Fungi and Related Genera
Pleurotus spp., globally distributed and belonging to species complexes, include several species of significant economic importance. In the previous study, strain Pleurotus sp. KACC 83073BP emerged as a potential candidate for plastic waste degradation. Although morphological analysis initially classified strain KACC 83073BP as Pleurotus opuntiae, its precise phylogenetic position remains uncertain. Recognizing the potential complexities in subsequent research caused from ambiguous initial identification or incorrect scientific nomenclature, we conducted a comprehensive phylogenetic analysis of strain KACC 83073BP and related genera. Using molecular data, which are segments of ribosomal RNA genes (ITS, LSU) and the protein-coding genes (RPB2), we conducted a phylogenetic investigation. In separate datasets using rDNA data alone, strain KACC 83073BP clustered with P. pulmonarius, P. sajorcaju, and P. eryngii. As these species (P. pulmonarius, P. sajorcaju, and P. eryngii) exhibited limited classification accuracy based solely on the ITS gene, we performed a comprehensive analysis using a combined marker gene dataset. This analysis, incorporating LSU and RPB2 genes, conclusively identified strain KACC 83073BP as P. opuntiae. Furthermore, the phylogenetic positions of an additional fourteen Pleurotus spp. strains, deposited within the KACC (Korean Agricultural Culture Collection), were confirmed. [Supported by grants from Rural Development Administration (Project No. PJ015298)]