Abstract
The interaction between aboveground and belowground biotic communities drives community assembly of plants and soil microbiota. As an important component of belowground microorganisms, root-associated fungi play pivotal roles in biodiversity maintenance and community assembly of host plants. The Betulaceae plants form ectomycorrhizae with soil fungi and widely distribute in various ecosystems. However, the community assembly of endophytic fungi in ectomycorrhizae is less investigated at a large spatial scale. Here, we examined the endophytic fungal communities in ectomycorrhizae of 22 species in four genera belonging to Betulaceae in Chinese forest ecosystems, using Illumina Miseq sequencing of internal transcribed spacer 2 amplicons. The relative contribution of host phylogeny, climate and soil (environmental filtering) and geographic distance (dispersal limitation) on endophytic fungal community was disentangled. In total, 2,106 endophytic fungal operational taxonomic units (OTUs) were obtained at a 97% sequence similarity level, dominated by Leotiomycetes, Agaricomycetes, Eurotiomycetes, and Sordariomycetes. The endophytic fungal OTU richness was significantly related with host phylogeny, geographic distance, soil and climate. The endophytic fungal community composition was significantly affected by host phylogeny (19.5% of variation explained in fungal community), geographic distance (11.2%), soil (6.1%), and climate (1.4%). This finding suggests that environmental filtering by plant and abiotic variables coupled with dispersal limitation linked to geographic distance determines endophytic fungal community assembly in ectomycorrhizae of Betulaceae plants, with host phylogeny being a stronger determinant than other predictor variables at the regional scale.
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Claims 9
Claim · model-written summary
Endophytic fungal communities in Betulaceae ectomycorrhizae comprised 2,106 OTUs at a 97% sequence similarity level.
Verbatim
e0“endophytic fungal communities in ectomycorrhizae of 22 species in four genera belonging to Betulaceae in Chinese forest ecosystems”
e1“In total, 2,106 endophytic fungal operational taxonomic units (OTUs) were obtained at a 97% sequence similarity level”
Claim · model-written summary
Endophytic fungal OTUs were dominated by Leotiomycetes, Agaricomycetes, Eurotiomycetes and Sordariomycetes.
- Taxon
- BetulaceaeBetulaceaee0
- Outcome
- endophytic fungal operational taxonomic units (OTUs)e1
- Qualifier
- dominated by Leotiomycetes, Agaricomycetes, Eurotiomycetes, and Sordariomycetese2
Verbatim
e0“endophytic fungal communities in ectomycorrhizae of 22 species in four genera belonging to Betulaceae in Chinese forest ecosystems”
e1“In total, 2,106 endophytic fungal operational taxonomic units (OTUs) were obtained at a 97% sequence similarity level”
e2“dominated by Leotiomycetes, Agaricomycetes, Eurotiomycetes, and Sordariomycetes”
Claim · model-written summary
Endophytic fungal OTU richness was significantly related to host phylogeny, geographic distance, soil and climate.
- Taxon
- BetulaceaeBetulaceaee0
- Outcome
- endophytic fungal OTU richnesse3
- Qualifier
- host phylogeny, geographic distance, soil and climatee3
- Setting
- Chinese forest ecosystemse0
Not reportedDirection
Verbatim
e0“endophytic fungal communities in ectomycorrhizae of 22 species in four genera belonging to Betulaceae in Chinese forest ecosystems”
e3“The endophytic fungal OTU richness was significantly related with host phylogeny, geographic distance, soil and climate”
Claim · model-written summary
Endophytic fungal community composition was significantly affected by host phylogeny, explaining 19.5% of variation.
- Taxon
- BetulaceaeBetulaceaee0
- Treatment
- host phylogenye4
- Outcome
- endophytic fungal community compositione4
- Value
- 19.5%e4
- Qualifier
- of variation explained in fungal communitye4
Not reportedDirection
Verbatim
e0“endophytic fungal communities in ectomycorrhizae of 22 species in four genera belonging to Betulaceae in Chinese forest ecosystems”
e4“The endophytic fungal community composition was significantly affected by host phylogeny (19.5% of variation explained in fungal community)”
Claim · model-written summary
Endophytic fungal community composition was significantly affected by geographic distance, explaining 11.2% of variation.
- Taxon
- BetulaceaeBetulaceaee0
- Treatment
- geographic distancee5
- Outcome
- endophytic fungal community compositione4
- Value
- 11.2%e5
Not reportedDirection
Verbatim
e0“endophytic fungal communities in ectomycorrhizae of 22 species in four genera belonging to Betulaceae in Chinese forest ecosystems”
e4“The endophytic fungal community composition was significantly affected by host phylogeny (19.5% of variation explained in fungal community)”
e5“geographic distance (11.2%)”
Claim · model-written summary
Endophytic fungal community composition was significantly affected by soil, explaining 6.1% of variation.
- Taxon
- BetulaceaeBetulaceaee0
- Treatment
- soile6
- Outcome
- endophytic fungal community compositione4
- Value
- 6.1%e6
Not reportedDirection
Verbatim
e0“endophytic fungal communities in ectomycorrhizae of 22 species in four genera belonging to Betulaceae in Chinese forest ecosystems”
e4“The endophytic fungal community composition was significantly affected by host phylogeny (19.5% of variation explained in fungal community)”
e6“soil (6.1%)”
Claim · model-written summary
Endophytic fungal community composition was significantly affected by climate, explaining 1.4% of variation.
- Taxon
- BetulaceaeBetulaceaee0
- Treatment
- climatee7
- Outcome
- endophytic fungal community compositione4
- Value
- 1.4%e7
Not reportedDirection
Verbatim
e0“endophytic fungal communities in ectomycorrhizae of 22 species in four genera belonging to Betulaceae in Chinese forest ecosystems”
e4“The endophytic fungal community composition was significantly affected by host phylogeny (19.5% of variation explained in fungal community)”
e7“climate (1.4%)”
Claim · model-written summary
Environmental filtering by plant and abiotic variables, coupled with dispersal limitation linked to geographic distance, determines endophytic fungal community assembly in Betulaceae ectomycorrhizae.
- Taxon
- BetulaceaeBetulaceaee7
- Outcome
- endophytic fungal community assemblye7
- Qualifier
- environmental filtering by plant and abiotic variables coupled with dispersal limitation linked to geographic distancee7
Verbatim
e7“environmental filtering by plant and abiotic variables coupled with dispersal limitation linked to geographic distance determines endophytic fungal community assembly in ectomycorrhizae of Betulaceae plants”
Claim · model-written summary
Host phylogeny was a stronger determinant of endophytic fungal communities than other predictor variables at the regional scale.
Verbatim
e0“endophytic fungal communities in ectomycorrhizae of 22 species in four genera belonging to Betulaceae in Chinese forest ecosystems”
e7“with host phylogeny being a stronger determinant than other predictor variables at the regional scale”