Taxonomic and ecological significance of synnema-like structures/acanthophyses produced by Physisporinus (Meripilaceae, Polyporales) species
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View abstract on PubMed
Summary
This summary is machine-generated.Physisporinus fungi form unique structures called synnema-like structures (SSs) with acanthophyses, aiding their adaptation to low-oxygen, wet wood environments. This acanthophysis formation is a key trait for identifying Physisporinus species and suggests a respiratory function.
Area Of Science
- Mycology
- Fungal Taxonomy
- Environmental Microbiology
Background
- Physisporinus fungi are versatile Basidiomycota involved in wood decomposition, pathogenesis, and orchid symbiosis.
- Some Physisporinus species form synnema-like structures (SSs) with acanthophyses in aquatic habitats and on agar cultures.
- The function and taxonomic significance of SSs/acanthophyses in Physisporinus were previously unclear.
Purpose Of The Study
- To investigate the acanthophysis-forming ability across Physisporinus and related genera.
- To experimentally determine the functional role of SSs in Physisporinus.
- To assess the utility of SS/acanthophysis formation as a taxonomic marker.
Main Methods
- Phylogenetic analyses of Meripilus, Physisporinus, and Rigidoporus strains.
- Culturing Physisporinus strains under varying oxygen (O2) concentrations (5%, 10%, 20%, 40%).
- Microscopic observation of acanthophysis formation and SS development.
Main Results
- Acanthophysis formation was exclusive to Physisporinus strains among the studied genera.
- Optimal acanthophysis production in Physisporinus occurred at 20% O2 concentration.
- SSs/acanthophyses are proposed to serve a respiratory function, aiding adaptation to hypoxic, wet environments.
Conclusions
- SS/acanthophysis formation is a significant taxonomic characteristic for the genus Physisporinus.
- The ability to form SSs/acanthophyses likely evolved as an adaptation to moist and aquatic habitats.
- These structures are crucial for Physisporinus to decompose wet wood in low-oxygen conditions.
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