不同底质条件下苦草根部细菌群落的组装模式

Assembly patterns of bacterial community in roots of Vallisneria natans under different substrate conditions

通过室内试验模拟不同底质条件,研究了苦草根部细菌群落的组装模式和功能变化。结果表明:底质条件的改变对苦草根际细菌群落产生了显著影响(p=0.003),特别是在添加有机质和植物根际促生菌的底质条件下;尽管根际细菌群落与根内生菌群落存在较强联系,但根内生菌群落组装过程拥有更高的确定性,而根际细菌群落组装过程更易受到植物宿主以外叠加的环境因素影响;功能预测结果表明在添加有机质和植物根际促生菌的条件下,苦草根部细菌群落拥有更高的代谢活性,更有利于有益细菌群落在苦草根部的富集。

Through laboratory test,different substrate conditions were simulated and the assembly patterns and functional changes of the bacterial community in the roots of Vallisneria natans were studied.The results show that changes in substrate conditions have a significant impact on the rhizosphere bacterial community of Vallisneria natans(p=0.003),especially under substrate conditions with the addition of organic matter and plant rhizosphere growth promoting bacteria.Although there is a strong correlation between the rhizosphere bacterial community and the endophytic bacterial community,the assembly process of the endophytic bacterial community has higher certainty,and the assembly process of the rhizosphere bacterial community is more susceptible to environmental factors superimposed outside the plant host.The functional prediction results indicate that under the conditions of adding organic matter and plant rhizosphere growth promoting bacteria,the bacterial community in the roots of Vallisneria natans has higher metabolic activity,which is more conducive to the enrichment of beneficial bacterial communities in the roots of Vallisneria natans.