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<p><UnorderedList Mark="Bullet"> <ItemContent> <p>Root secretions interact with microbes during fertilizer application.</p> </ItemContent> <ItemContent> <p>Inorganic fertilizers boost phosphorus-solubilizing bacteria abundance by raising pH.</p> </ItemContent> <ItemContent> <p>Organic fertilizers directly affect soil’s available phosphorus.</p> </ItemContent> <ItemContent> <p>Lactic acid post-fertilization alters pH, affecting phosphorus bacteria.</p> </ItemContent> </UnorderedList></p><p>The management of phosphorus (P) is challenged by the disruption of the soil natural phosphorus cycle, primarily due to over-fertilization. However, less research has been done on how fertilization affects organic acids secreted by roots, which in turn affects bacteria harboring the <i>pqqC</i> and <i>phoD</i> genes. Employing high-throughput sequencing and quantitative PCR, we analyzed the impact of various fertilizer treatments on these bacterial communities. Our research reveals that both organic and inorganic fertilizers alter soil pH, a change that is closely linked to changes in oxalic, gluconic, and succinic acids in the soil. These secretions subsequently modify the composition of <i>pqqC</i> and <i>phoD</i>-harboring bacterial communities, thereby enhancing P solubilization. Our findings suggest that while inorganic fertilizers can increase P-solubilizing bacterial populations by elevating soil pH, organic fertilizers not only boost these bacterial communities but also maintain the P content in the soil, thereby directly supporting P utilization. After the application of organic fertilizers, the content of lactic acid and gluconic acid can not only indirectly affect the abundance of P solubilizing bacteria by increasing soil pH, but also directly increase the effective P content of the soil. Additionally, the introduction of nitrogen (N) and potassium (K) alongside P fertilization appears to fine-tune this microbial-plant interaction, paving the way for more efficient P use in agriculture. Consequently, our research provides sustainable strategies for enhancing agricultural productivity amid P management challenges.</p>

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Organic fertilizers shape the bacterial communities harboring pqqC and phoD genes by altering organic acids, leading to improved phosphorus utilization

  • 期刊论文

  • 发表日期：

    2025年3月12日

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  • Liying Zhi,
  • Bangxiao Zheng,
  • Yunjie Xu,
  • Jiayang Xu,
  • Josep Peñuelas,
  • Jordi Sardans,
  • Yixiao Chang,
  • Shuquan Jin,
  • Hong Ying,
  • Kai Ding

摘要

Root secretions interact with microbes during fertilizer application.

Inorganic fertilizers boost phosphorus-solubilizing bacteria abundance by raising pH.

Organic fertilizers directly affect soil’s available phosphorus.

Lactic acid post-fertilization alters pH, affecting phosphorus bacteria.

The management of phosphorus (P) is challenged by the disruption of the soil natural phosphorus cycle, primarily due to over-fertilization. However, less research has been done on how fertilization affects organic acids secreted by roots, which in turn affects bacteria harboring the pqqC and phoD genes. Employing high-throughput sequencing and quantitative PCR, we analyzed the impact of various fertilizer treatments on these bacterial communities. Our research reveals that both organic and inorganic fertilizers alter soil pH, a change that is closely linked to changes in oxalic, gluconic, and succinic acids in the soil. These secretions subsequently modify the composition of pqqC and phoD-harboring bacterial communities, thereby enhancing P solubilization. Our findings suggest that while inorganic fertilizers can increase P-solubilizing bacterial populations by elevating soil pH, organic fertilizers not only boost these bacterial communities but also maintain the P content in the soil, thereby directly supporting P utilization. After the application of organic fertilizers, the content of lactic acid and gluconic acid can not only indirectly affect the abundance of P solubilizing bacteria by increasing soil pH, but also directly increase the effective P content of the soil. Additionally, the introduction of nitrogen (N) and potassium (K) alongside P fertilization appears to fine-tune this microbial-plant interaction, paving the way for more efficient P use in agriculture. Consequently, our research provides sustainable strategies for enhancing agricultural productivity amid P management challenges.