Rhizosphere microorganisms play an important role in protecting plant health, improving plant productivity, and accumulating secondary metabolites. The construction process of plant rhizosphere soil microbial community has always been a hot research topic. Non biological factors, such as soil physicochemical properties and climatic factors, as well as biological factors, including plant species, genotypes, and plant immune systems, have been shown to play an important role in driving the composition of rhizosphere microorganisms. The rhizosphere of plants is a rich ecosystem that supports various organisms such as bacteria, fungi, archaea, protozoa, viruses, fungi, and nematodes. The influence of microbial interactions on soil microorganisms in the rhizosphere of plants cannot be ignored.
In order to clarify the role of the previous microbial microbial interaction in the assembly and function of the rhizosphere soil microbial community, the research team of the Northwest Plateau Biology Institute of the Chinese Academy of Sciences traveled 1500 kilometers across the Qinghai Tibet Plateau to collect the rhizosphere soil of Anisodamine, a plant endemic to the Qinghai Tibet Plateau. The composition of bacterial, fungal, archaea and protozoan communities in the rhizosphere soil of Anisodamine was determined through 16S, 18S and ITS high-throughput amplification sequence. The results showed that there was a significant but weak distance attenuation relationship among bacteria, fungi, archaea, and protozoa in the rhizosphere soil of scopolamine. Through comprehensive analysis of geographical, biological, and abiotic factors, it is shown that the trophic level relationship between protozoa and bacteria and fungi drives the communities of bacteria, fungi, and protozoa α and β The main influencing factors of diversity, rather than biological factors, have a greater impact on archaea, including soil pH, available phosphorus, total phosphorus, and annual average temperature. Meanwhile, compared with a single microbial group, the interaction between microorganisms has a more significant impact on the physiological and ecological functions of Ranunculus tanguticus, including plant biomass, total nitrogen content, total phosphorus content, and secondary metabolite content. The analysis of multi domain networks of bacteria, fungi, archaea, and protists shows that bacteria occupy the central position of the co-occurrence network of bacteria, fungi, archaea, and protists, and play a crucial connecting role. The addition of protozoa significantly enhances the stability of single domain networks of bacteria, fungi, and archaea. The research results indicate that the nutritional relationship between protozoa, bacteria, and fungi plays an important role in the assembly and function of soil microbial communities in the rhizosphere of scopolamine. Bacteria are an important link between different microbial groups in the entire rhizosphere soil microbial community. These findings help people fully utilize the beneficial functions of rhizosphere microorganisms on plants and achieve sustainable utilization of biological resources.
The research findings, titled Trophic relationships between protists and bacteria and fungi drive the biogeography of rhizosphere soil microbial community and impact plant physiological and ecological functions
, were published in Microbiological Research.
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