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Peer-reviewedCC BY 4.0Microbiome

The PSR signaling pathway facilitates enrichment of P-solubilizing Burkholderia to enhance P acquisition in soybean

  • Xiaoqian Wang
  • Jianfeng Lei
  • Kefei Zhang
  • Junhao Shi
  • Yanjun Li
  • Chengjiao Zhai
  • Xu Zhao
  • Hanyu Xu
  • Cunhu Wang
  • Ruineng Xu
  • Xiurong Wang
  • Hong Liao
1 more authors
  • Yongjia Zhong
Open at sourceDOICite

Abstract

Background: Association with beneficial microbes is essential for plants maintaining fitness under biotic or abiotic stress. Mechanisms underlying this call for community support, and the species involved, remain largely unknown.

Results: We revealed that the phosphate starvation response (PSR) pathway contributes to enrich the phosphate solubilizing bacteria (PSB) Burkholderia for better P acquisition in soybean. We discovered that P deficiency significantly increased the relative abundance of Burkholderia in soybean roots and rhizospheres in field trials. Constitutively activation of the PSR pathway through overexpression of GmPHR33 significantly enhanced root-associated compartments with Burkholderia , while repression through knockout of GmPHR33 repressed it. Furthermore, the PSR pathway appeared to regulate malate exudation to enrich PSB, while the GmPHR33-GmALMT29 module was revealed as a mediator of the malate exudation process.

Conclusions: Our results uncovered a novel mechanism utilized by legumes to enrich functional microbes that can help legumes cope with P deficiency. The mechanism elucidated in this work acts through activation of the PSR signaling pathway under P deficiency conditions, which enriches PSB, particularly Burkholderia, for support in acquiring P.

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Cite

BibTeXRIS
BibTeX
@article{wang2026signaling,
  title = {{The PSR signaling pathway facilitates enrichment of P-solubilizing Burkholderia to enhance P acquisition in soybean}},
  author = {Xiaoqian Wang and Jianfeng Lei and Kefei Zhang and Junhao Shi and Yanjun Li and Chengjiao Zhai and Xu Zhao and Hanyu Xu and Cunhu Wang and Ruineng Xu and Xiurong Wang and Hong Liao and Yongjia Zhong},
  journal = {Microbiome},
  year = {2026},
  month = oct,
  doi = {10.1186/s40168-026-02555-x},
  url = {https://link.springer.com/10.1186/s40168-026-02555-x},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - The PSR signaling pathway facilitates enrichment of P-solubilizing Burkholderia to enhance P acquisition in soybean
AU  - Xiaoqian Wang
AU  - Jianfeng Lei
AU  - Kefei Zhang
AU  - Junhao Shi
AU  - Yanjun Li
AU  - Chengjiao Zhai
AU  - Xu Zhao
AU  - Hanyu Xu
AU  - Cunhu Wang
AU  - Ruineng Xu
AU  - Xiurong Wang
AU  - Hong Liao
AU  - Yongjia Zhong
PY  - 2026
DA  - 2026/10/08
JO  - Microbiome
DO  - 10.1186/s40168-026-02555-x
UR  - https://link.springer.com/10.1186/s40168-026-02555-x
AB  - Background: Association with beneficial microbes is essential for plants maintaining fitness under biotic or abiotic stress. Mechanisms underlying this call for community support, and the species involved, remain largely unknown.  Results: We revealed that the phosphate starvation response (PSR) pathway contributes to enrich the phosphate solubilizing bacteria (PSB) Burkholderia for better P acquisition in soybean. We discovered that P deficiency significantly increased the relative abundance of Burkholderia in soybean roots and rhizospheres in field trials. Constitutively activation of the PSR pathway through overexpression of GmPHR33 significantly enhanced root-associated compartments with Burkholderia , while repression through knockout of GmPHR33 repressed it. Furthermore, the PSR pathway appeared to regulate malate exudation to enrich PSB, while the GmPHR33-GmALMT29 module was revealed as a mediator of the malate exudation process.  Conclusions: Our results uncovered a novel mechanism utilized by legumes to enrich functional microbes that can help legumes cope with P deficiency. The mechanism elucidated in this work acts through activation of the PSR signaling pathway under P deficiency conditions, which enriches PSB, particularly Burkholderia, for support in acquiring P.
SN  - 2049-2618
ER  -