期刊
MICROORGANISMS
卷 10, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/microorganisms10061249
关键词
fungi; bacteria; wood decay; rotten wood; secondary metabolites; antibiotic; polyketide synthase (PKS); non-ribosomal peptide synthetase (NRPS); cellulase; esterase; ferulic acid; enzyme
类别
资金
- Spanish Ministry of Economy and Competitiveness (MINECO, Spain) through the APCIN section [PCIN-2016-081]
- Research Council of Norway through the European Union program ERA-IB 7th Joint Call (ProWood project: Wood and Derivatives Protection by Novel Bio-Coating Solutions) [271062/O70]
This study found that bacterial diversity in decaying wood was higher than fungal heterogeneity, with 194 different cultivable bacterial isolates mainly belonging to Bacillaceae, Streptomycetaceae, Paenibacillaceae, and Microbacteriaceae, and 343 fungal strains mainly belonging to Aspergillaceae, Hypocreaceae, and Coniochaetaceae. The results also suggest that decaying wood is an ecologically rich niche and a promising source of biotechnologically interesting microorganisms.
Rotting wood is inhabited by a large diversity of bacteria, fungi, and insects with complex environmental relationships. The aim of this work was to study the composition of the microbiota (bacteria and fungi) in decaying wood from a northwest Spanish forest as a source of industrially relevant microorganisms. The analyzed forest is situated in a well-defined biogeographic area combining Mediterranean and temperate macrobioclimates. Bacterial diversity, determined by metagenome analyses, was higher than fungal heterogeneity. However, a total of 194 different cultivable bacterial isolates (mainly Bacillaceae, Streptomycetaceae, Paenibacillaceae, and Microbacteriaceae) were obtained, in contrast to 343 fungal strains (mainly Aspergillaceae, Hypocreaceae, and Coniochaetaceae). Isolates traditionally known as secondary metabolite producers, such as Actinobacteria and members of the Penicillium genus, were screened for their antimicrobial activity by the detection of antibiotic biosynthetic clusters and competitive bioassays against fungi involved in wood decay. In addition, the ability of Penicillium isolates to degrade cellulose and release ferulic acid from wood was also examined. These results present decaying wood as an ecologically rich niche and a promising source of biotechnologically interesting microorganisms.
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