Soil microbial community harboring key genes drives rhizosphere phosphorus mobilization of phosphorus-accumulating Polygonum hydropiper

作者：Daihua Ye, Yuyue Lin, Tao Liu, Xizhou Zhang, Yu Tang, Keji Wang, Huagang Huang, Haiying Yu, Yong‐Dong Wang, Xinhua He, Tingxuan Li · 发表于：Applied Soil Ecology · 年份：2025 · DOI：10.1016/j.apsoil.2025.106314 · 被引用次数：4 · 研究领域：Wastewater Treatment and Nitrogen Removal、Legume Nitrogen Fixing Symbiosis、Plant nutrient uptake and metabolism

It is important to know how microbial community and P cycling genes respond in rhizosphere of P-accumulating plants under different P treatments, and whether they would affect the changes in rhizosphere P availability and plant P uptake. Here, a pot experiment was conducted with a P-accumulating species Polygonum hydropiper under three P levels to analyze rhizosphere microbial structure and interactions, P cycling genes and their correlations with soil P availability and plant P accumulation. P. hydropiper showed an enhanced growth and P accumulation under high-P treatment compared with low-P and normal-P treatments. Available P (AP) concentration in rhizosphere soil was higher than in bulk soil under high-P treatment. Acidobacteria, Actinomycetota, Pseudomonadota, Verrucomicrobia, Ascomycota, Basidiomycota, and Chytridiomycota were significantly enriched in rhizosphere soil and closely related to other taxa within each intra-trophic network. Compared to bulk soil, the abundance of genes involved in P uptake and transport, and organic phosphonates degradation was higher in rhizosphere of P. hydropiper . Higher abundance of inorganic P solubilization genes were found in rhizosphere of P. hydropiper under high-P treatment than under normal-P treatment. Notably, phnW and gcd were the first two significant predictor of soil AP concentration in rhizosphere of P. hydropiper , followed by phnA and glpT , which were mainly harbored in Pseudomonadota, Actinomycetota, Acidobacteria, Ve...