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Phosphate-solubilizing function of Pediococcus pentosaceus PSM16 and its underlying mechanism
Hong Yaling1, Chen Shasha1, Li Mengyao1
1National and Local Joint Engineering Laboratory of Animal Peptide Drug Development, Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, College of Life Sciences, Hunan Normal University, Changsha, Hunan, China.
Microbiology Spectrum
|June 10, 2025
Summary
Pediococcus pentosaceus PSM16 enhances plant phosphorus uptake by solubilizing soil phosphorus. This phosphate-solubilizing bacteria (PSB) improves soil fertility and promotes plant growth, offering a sustainable agricultural solution.
Area of Science:
- Agricultural Biotechnology
- Microbiology
- Soil Science
Background:
- Phosphorus is essential for plant growth but often unavailable in soil.
- Phosphate-solubilizing bacteria (PSB) can convert insoluble phosphorus into plant-available forms.
- Pediococcus pentosaceus PSM16 was previously shown to degrade phytic acid.
Purpose of the Study:
- To investigate the phosphorus-solubilizing capacity of Pediococcus pentosaceus PSM16.
- To evaluate the potential of PSM16 for practical agricultural applications.
- To identify genes and enzymes responsible for PSM16's phosphorus solubilization.
Main Methods:
- Whole-genome sequencing of Pediococcus pentosaceus PSM16.
- Analysis of genes associated with acid phosphatase production.
- Informatics analysis to identify homologous phosphatases in compost.
Main Results:
- PSM16 significantly increased bioavailable phosphorus, lowered soil pH and conductivity.
- Identified key genes (GM000834, GM000917, GM000925, GM000974) linked to phosphatase production.
- Discovered homologous phosphatases in compost, indicating potential for agricultural use.
Conclusions:
- Pediococcus pentosaceus PSM16 effectively solubilizes phosphorus, enhancing soil fertility and plant growth.
- Identified specific genes and homologous phosphatases crucial for this function.
- PSM16 is a promising candidate for developing sustainable, cost-effective bio-fertilizers.
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