梨杂种后代矮生与乔生株根系内生微生物群落多样性比较OA

To investigate the composition of root endophytic microbial communities in pear trees and their correlation with host tree types,this study analyzes the root endophytic microbial community structure in 7-year-old arborescent and dwarf pear hybrid populations,using 16S rRNA and ITS high-throughput sequencing technologies.The results demonstrate that the root endophytic bacterial community in the dwarf pear population exhibits significant correlations with tree height,trunk circumference,and trunk diameter,whereas the arborescent pear population shows no such significant correlations.The co-occurrence networks of endophytic bacteria and fungi in the dwarf population are more complex than those in the arborescent population.Specifically,the dwarf population predominantly enriches bacterial taxa such as Bacteroidota and Cyanobacteria,while the arborescent population enriches bacterial taxa such as Proteobacteria.For fungi,the dwarf population mainly enriches fungal taxa such as Ascomycota,whereas the arborescent population enriches fungal taxa such as Basidiomycota.Both dwarf and arborescent pear populations shape their own distinct bacterial and fungal microbial communities.