
Analysis of bacterial community characteristics in the rhizosphere soil of wild tree peony
GUO Lili, ZHANG Chenjie, WANG Fei, SHEN Jiajia, ZHANG Kaiyue, HE Lixia, GUO Qi, HOU Xiaogai
JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2023, Vol. 47 ›› Issue (3) : 45-55.
Analysis of bacterial community characteristics in the rhizosphere soil of wild tree peony
【Objective】 The microbial community in the rhizosphere is produced by the interactions of the soil environment and root metabolic activities, and plays an important role in plant growth and development. Analysis of characteristics of bacterial community in the rhizosphere soil of wild tree peony species possesses important theoretical significance for the effective use of microbial resources to protect wild plant germplasm resources and lays a foundation for improving the soil environment of wild tree peony species and realizing the broad-spectrum planting of high-quality germplasm resources. 【Method】 In the present study, MiSeq high-throughput sequencing technology with 16S rRNA genes was employed to investigate bacterial community characteristics in the rhizosphere soil of nine wild tree peony species (Paeonia ludlowii, P. potaninii, P. delavayi, P. lutea, P. rockii, P. ostii, P. decomposita, P. jishanensis and P. qiui) as well as their relevance with physicochemical properties. 【Result】A total of 606 536 sequences and 99 OTU clusters were obtained by high-throughput sequencing, which belonged to 24 phyla, 84 classes, 154 orders, 280 families and 603 genera. Alpha diversity analysis revealed that the rhizosphere microbial community of P. ostii contained the highest number of species. Beta analysis revealed that the bacterial community structures in the rhizosphere soils of P. decomposita, P. rockii, P. lutea, P. ostii, P. delavayi and P. ludlowii were similar. Analysis of bacterial community compositions showed that the core and dominant bacteria in the rhizosphere soil were Proteobacteria, Acidobacteria, Actinobacteria and Chloroflexi. Significant differences were found in beneficial bacteria among different wild tree species, such as Acidobacteria, Chloroflexi, Nitrospirae, Gemmatimonadetes, Nitrosospira and Pseudomonas. Predicted functions of the rhizosphere bacterial community have mostly focused on metabolism, genetic information processing, and environmental information processing. The bacterial community in the rhizosphere of wild peony trees is significantly affected by soil organic matter and available potassium. 【Conclusion】These results indicated that the bacterial community structure in the rhizosphere soil of different wild tree peony species was different, and the formation of a bacterial community was closely related to the varieties of tree peony. The enrichment in beneficial bacteria (genera) promoted plant growth. In the future, rhizospheric microbial resources could be effectively utilized to improve the soil environment of wild tree peonies, to realize the broad-spectrum planting of high-quality germplasm resources, and to lay the foundation for the protection of wild planting resources.
Paeonia × suffruticosa / wild tree peony / properties of rhizospheric soil / rhizospheric bacteria / community structure / community composition / correlation analysis
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