盐碱地杜梨根际与非根际土壤微生物多样性比较

打开文本图片集

中图分类号：S154.3 文献标识号：A 文章编号：1001-4942（2025）08-0092-08

AbstractAnalysis of plant rhizosphere microbial community structure changes under saline-alkali environmentcan provide the theoretical basis and practical guidance for finding plant growth promotion rhizosphere microorganisms （PGPRs）which can alleviate saline-alkali injuries effectively.Pyrus betulaefolia is a common rootstock in northern China with strong tolerance to salt and alkali stress.In this study，the rhizosphere soil of P.betulaefolia grown in saline-alkali environment for many years was taken as material，the microbial community diversity and function were analyzed and forecasted through metagenome technology. The results showed that there were significant differences in the structure and diversity of microbial communities between rhizosphere and non-rhizosphere soils，and the species richnessand diversities in rhizosphere soil were significantly higher than those in non-rhizosphere soil.The dominant bacteria phyla in the rhizosphere soil were Actinobacteriota，Proteobacteria，Acidobacteriota and Chloroflexota.The rhizosphere soil was also enriched with more marker microorganisms，including Proteobacteria，Actinobacteriota and Bacteroidetes，as well as many related classes，orders，familiesand genera belonging to the three phyla.The results offunctional annotations showed that the microorganisms enriched in rhizosphere soil had stronger activities of vitamins，amino acids and polysaccharides metablism，and abilities of stronger cytokinin synthesis and chemical component degradation.The enrichment of these functions might be helpful to enhance the tolerance of plants to saline-alkali and other harsh environments.The study results could lay a foundation for high-quality and eficient cultivation of P . betulaefolia and saline-alkali soil improvement and utilization.

Keywords Pyrus betulaefolia ; Saline-alkali land； Rhizosphere soil； Microbial community

土壤盐碱化是全球农业面临的一个日趋严重的问题，威胁作物生产的可持续性[1]。（剩余10164字）