Dichomitus squalens partially tailors its molecular responses to the composition of solid wood: Responses of Dichomitus squalens to solid wood
Journal Article
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· Environmental Microbiology
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- Fungal Physiology, Westerdijk Fungal Biodiversity Institute and Fungal Molecular Physiology, Utrecht University, Utrecht The Netherlands
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Utrecht The Netherlands
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland WA USA
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland WA USA
- US Department of Energy Joint Genome Institute, Walnut Creek CA USA
- Department of Microbiology, University of Helsinki, Helsinki Finland
- Fungal Physiology, Westerdijk Fungal Biodiversity Institute and Fungal Molecular Physiology, Utrecht University, Utrecht The Netherlands; Department of Microbiology, University of Helsinki, Helsinki Finland
White-rot fungi, such as Dichomitus squalens, degrade all wood components and inhabit mixed wood forests containing both soft- and hardwood species. In this study, we evaluated how D. squalens responded to the compositional differences in softwood (guaiacyl (G) lignin and higher mannan content) and hardwood (syringyl/guaiacyl (S/G) lignin and higher xylan content) using semi-natural solid cultures. Spruce (softwood) and birch (hardwood) sticks were degraded by D. squalens as measured by oxidation of the lignins using 2D-NMR. The fungal response as measured by transcriptomics, proteomics and enzyme activities showed a partial tailoring to wood composition. Mannanolytic transcripts and proteins were more abundant in spruce cultures, while a proportionally higher xylanolytic activity was detected in birch cultures. Both wood types induced manganese peroxidases to a much higher level than laccases, but higher transcript and protein levels of the manganese peroxidases were observed on the G-lignin rich spruce. Overall, the molecular responses demonstrated a stronger adaptation to the spruce rather than birch composition, possibly because D. squalens is mainly found degrading softwoods in nature, which supports the ability of the solid wood cultures to reflect the natural environment.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1503505
- Report Number(s):
- PNNL-SA-135900
- Journal Information:
- Environmental Microbiology, Journal Name: Environmental Microbiology Journal Issue: 11 Vol. 20; ISSN 1462-2912
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
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