Publications by authors named "A Tunlid"
In microbiological studies, a common goal is to link environmental factors to microbial activities. Both environmental factors and microbial activities are typically derived from bulk samples. It is becoming increasingly clear that such bulk environmental parameters poorly represent the microscale environments microorganisms experience.
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- The study investigates how different types of fungi degrade cellulose using both enzymatic and nonenzymatic methods, along with Fenton-generated radicals.
- Researchers identified two primary mechanisms of cellulose degradation: one that thins microfibrils and reduces crystalline cellulose, reflecting typical enzymatic action, and another that alters crystalline cellulose without significant fiber thinning, observed in specific fungi.
- The findings highlight a complexity in fungal degradation processes, suggesting that current ecological classifications do not fully capture the diversity of cellulose degradation strategies employed by fungi.
A widespread mechanism in ectomycorrhizal fungi to access nitrogen from mineral-associated proteins.
Environ Microbiol
October 2021
A large fraction of nitrogen (N) in forest soils is present in mineral-associated proteinaceous compounds. The strong association between proteins and minerals limits microbial accessibility to this source, which is a relatively stable reservoir of soil N. We have shown that the ectomycorrhizal (ECM) fungus Paxillus involutus can acquire N from iron oxide-associated proteins.
View Article and Find Full Text PDFThe ectomycorrhizal fungus decomposes proteins using a two-step mechanism, including oxidation and proteolysis. Oxidation involves the action of extracellular hydroxyl radicals (•OH) generated by the Fenton reaction. This reaction requires the presence of iron(II).
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