Published December 22, 2025
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Two new species of Penicillium (Eurotiales, Aspergillaceae) and the first record of P. danzhouense from mangrove sediment in Thailand, with notes on antibacterial activity
Authors/Creators
- 1. Kasetsart University, Bangkok, Thailand
- 2. National Changhua University of Education, Changhua, Taiwan
- 3. Kasetsart University, Bangkok, Thailand|Biodiversity Center Kasetsart University (BDCKU), Bangkok, Thailand
Description
Two novel species of Penicillium, comprising P. chanthaburiense sp. nov. and P. buranakarlianum sp. nov., were isolated from mangrove sediment collected at the King Rama IX International Mangrove Botanical Garden in Chanthaburi Province, Thailand. Morphological characterization combined with multilocus phylogenetic analyses of the internal transcribed spacer (ITS), β-tubulin (TUB), calmodulin (CaM), and RNA polymerase II second largest subunit (RPB2) genes placed P. chanthaburiense sp. nov. as a new member of section Exilicaulis, series Erubescentia, while P. buranakarlianum sp. nov. was assigned to section Lanata-Divaricata, series Janthinella. In addition, this study reports the first record of P. danzhouense from mangrove sediment in Thailand. Diagnostic morphological and molecular features distinguishing these taxa from their closest phylogenetic relatives are presented. These findings enrich the taxonomic framework of Penicillium and contribute to the understanding of fungal biodiversity in mangrove ecosystems. Furthermore, P. chanthaburiense sp. nov. exhibited antibacterial activity against several clinically relevant Gram-positive pathogens, including methicillin-resistant Staphylococcus aureus (MRSA), highlighting the potential of mangrove-derived Penicillium species in antimicrobial research.
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