Abstract
The slow degradation of residual stumps after harvesting Moso bamboo ( Phyllostachys edulis ) severely restricts sustainable forest management and carbon sequestration enhancement. In this study, Moso bamboo stumps (MB) and rhizosphere soils of Moso bamboo stumps (BS) at different grades were used as materials. By integrating compositional analysis with high-throughput sequencing, we elucidated the succession, functional differentiation, and synergistic mechanisms of fungal communities during lignocellulose degradation. The results showed that MB decomposition were characterized by preferential hemicellulose degradation, lagging cellulose degradation, with lignin content increasing from 23.45% to 38.97%, forming a recalcitrant barrier, while both total sugar and reducing sugar contents decreased; simultaneously, dry density decreased and ash content increased. Fungal communities in both habitats were dominated by Ascomycota and Basidiomycota, with higher fungal diversity in BS, which served as a core microbial source pool. Shared genera between the two habitats (e.g., Trichoderma , Penicillium ) constituted the core degrading community, reflecting functional redundancy; unique genera in MB (e.g., Scytinostroma ) specifically participated in lignocellulose degradation, indicating functional specificity, whereas unique genera in BS (e.g., Apiotrichum ) rapidly responded to initial decay products, revealing cross habitat synergy. FungalTraits functional annotation indicated that wood saprotrophs dominated in situ degradation in MB, whereas soil saprotrophs dominated in BS, facilitating secondary transformation of decay products and nutrient cycling. This study elucidates the cross habitat synergistic fungal degradation mechanism, providing microbial resources and a theoretical basis for stump decomposition promotion and efficient bamboo forest management. • Decomposition showed "hemicellulose-first, lignin-enriched, ash-accumulating" pattern. • Rhizosphere fungi migrated to stumps, structural degradation drove fungal succession. • Ascomycota and Basidiomycota dominated as dual-functional axis (decomposition-repair). • Rhizosphere fungal genera (451) exceeded stumps (179), verifying microbial reservoir. • Wood and soil saprotrophs synergistically drive stump decomposition and nutrient cycling.
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Claims 13
Claim · model-written summary
Bamboo stump decomposition preferentially degraded hemicellulose while cellulose degradation lagged.
- Outcome
- preferential hemicellulose degradation, lagging cellulose degradatione0
Not reportedTaxon
Verbatim
e0“MB decomposition were characterized by preferential hemicellulose degradation, lagging cellulose degradation”
Claim · model-written summary
Bamboo stump lignin content rose from 23.45% to 38.97%.
Not reportedTaxon
Verbatim
e0“lignin content increasing from 23.45% to 38.97%”
Claim · model-written summary
Total and reducing sugar contents decreased during bamboo stump decomposition.
Not reportedTaxon
Verbatim
e0“both total sugar and reducing sugar contents decreased”
Claim · model-written summary
Bamboo stump dry density decreased.
Not reportedTaxon
Verbatim
e0“dry density decreased and ash content increased”
Claim · model-written summary
Bamboo stump ash content increased.
Not reportedTaxon
Verbatim
e0“dry density decreased and ash content increased”
Claim · model-written summary
Ascomycota and Basidiomycota dominated both fungal habitats.
- Interactor
- Ascomycota and BasidiomycotaAscomycotaBasidiomycotae0other
- Outcome
- Fungal communities in both habitatse0
Not reportedTaxon
Verbatim
e0“Fungal communities in both habitats were dominated by Ascomycota and Basidiomycota”
Claim · model-written summary
Fungal diversity was higher in bamboo rhizosphere soil than in stumps.
Not reportedTaxon
Verbatim
e0“with higher fungal diversity in BS, which served as a core microbial source pool.”
Claim · model-written summary
Shared fungal genera formed a core degrading community.
- Interactor
- Trichoderma , Penicillium
Penicillium
Trichodermae0other - Outcome
- core degrading communitye0
Not reportedTaxon
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shared genera between the two habitats (e.g., Trichoderma , Penicillium ) constituted the core degrading community, reflecting functional redundancy”
Claim · model-written summary
Stump-specific Scytinostroma participated in lignocellulose degradation.
- Interactor
- Scytinostroma
Scytinostromae0other - Outcome
- lignocellulose degradatione0
Not reportedTaxon
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“unique genera in MB (e.g., Scytinostroma ) specifically participated in lignocellulose degradation”
Claim · model-written summary
Rhizosphere-specific Apiotrichum responded rapidly to initial decay products.
- Interactor
- ApiotrichumApiotrichume0other
- Outcome
- initial decay productse0
- Direction
- rapidly respondede0
Not reportedTaxon
Verbatim
e0“unique genera in BS (e.g., Apiotrichum ) rapidly responded to initial decay products”
Claim · model-written summary
Wood saprotrophs dominated stump degradation.
Not reportedTaxon
Verbatim
e0“wood saprotrophs dominated in situ degradation in MB”
Claim · model-written summary
Soil saprotrophs dominated rhizosphere soil and facilitated secondary decay-product transformation.
- Interactor
- soil saprotrophse0other
- Outcome
- secondary transformation of decay products and nutrient cyclinge0
Not reportedTaxon
Verbatim
e0“soil saprotrophs dominated in BS, facilitating secondary transformation of decay products and nutrient cycling.”
Claim · model-written summary
Rhizosphere soil had 451 fungal genera versus 179 in stumps.
Not reportedTaxon
Verbatim
e0“Rhizosphere fungal genera (451) exceeded stumps (179)”