生态学报2025，Vol.45Issue(7)：3279-3292,14.DOI:10.20103/j.stxb.202404110792
山合欢和银合欢根系细菌群落特征
Characteristics of root bacterial community of native Albizia kalkora and exotic Leucaena leucocephala
摘要
Abstract
Root microbiota,originating from soil microorganisms,significantly impacts plant growth,development,adaptability,and invasiveness.However,the characteristics of root endophytic bacterial communities in native and exotic legumes remain poorly understood.In this study,combing with high-throughput sequencing technology alongside controlled indoor cultivation methods,we examined the root endophytic bacterial community characteristics of native Albizia kalkora and exotic Leucaena leucocephala in a dry,hot valley.The results showed that:(1)Throughout cultivating period,L.leucocephala exhibited significantly greater plant height and litter biomass compared to A.kalkora,and the leaf N∶P ratio,nodule number and nodule weight of L.leucocephala were also significantly higher than those of A.kalkora after 80 days.(2)There were significant differences in the composition of root bacterial community between A.kalkora and L.leucocephala.At the phylum level,the most dominant phylum was Proteobacteria,and the relative abundance of Firmicutes and Patescibacteria in the roots of A.kalkora was significantly higher than that of L.leucocephala,while the relative abundance of Bacteroidetes and Actinobacteria was significantly lower than that of L.leucocephala.At the genus level,L.leucocephala's roots had a significantly higher relative abundance of Mesorhizobium,Pseudolabrys,and Streptomyces compared to A.kalkora,yet significantly lower relative abundances of Bradyrhizobium,Paenibacillus,Novosphingobium,Aquicella,and Saccharimonadaceae.(3)Plant,culture time and their interaction had no significant effects on the α diversity indices of root bacterial communities,and the indices of Chao 1,Pielou e,Shannon and Simpson of root bacteria between A.kalkora and L.leucocephala were not significant different.(4)Metabolism was the most important function within the root bacterial community,constituting approximately 80％of the relative abundance.After 80 days,significant differences in cell growth and death,membrane transport,carbohydrate metabolism,metabolism of terpenoids and polyketides were found between A.kalkora and L.leucocephala.In conclusion,there are significant differences in the growth traits and root bacterial community between A.kalkora and L.leucocephala,and the possible effects of these differences should be considered in the process of vegetation restoration in future.关键词
植物入侵/山合欢/银合欢/根系细菌/群落结构Key words
plant invasion/Albizia kalkora/Leucaena leucocephala/endophytic bacteria in root/community structure引用本文复制引用
王雪梅,闫帮国,王蓥燕,黄天志,王立东,白如霞..山合欢和银合欢根系细菌群落特征[J].生态学报,2025,45(7):3279-3292,14.基金项目
国家自然科学基金项目(32101363) （32101363）
