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| Effects of phosphorus-solubilizing bacteria on tomato seedling growth and soil phosphorus availability |
| Received:December 19, 2024 |
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| KeyWord:phosphorus-solubilizing bacteria;tomato;rhizosphere soil;physical and chemical properties;microbial |
| Author Name | Affiliation | E-mail | | HUANG Haizhou | College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China | | | LUO Dan | College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China | luodan@lut.edu.cn | | CHEN Jixiang | College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China | | | WANG Tianfeng | College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China | | | ZHANG Qingfang | College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China | | | WANG Yonggang | School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China | |
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| Abstract: |
| A pot experiment was conducted to investigate the effects of phosphorus-solubilizing bacteria Acinetobacter baumannii（B6）and Burkholderia cepacia（Z7） on tomato seedling growth parameters, rhizosphere soil physicochemical properties, enzyme activity, and microbial community diversity. The results showed that the application of phosphorus-solubilizing bacteria significantly promoted the increase in plant height and stem diameter of tomato seedlings, with the combined strain（B6+Z7）exhibiting the best effect, increasing plant height and stem diameter by 6.36% and 12.35%, respectively. In addition, phosphorus-solubilizing bacteria treatment significantly enhanced peroxidase（POD）activity and soluble sugar content in tomato leaves while reducing malondialdehyde（MDA）content, indicating improved stress resistance in tomato seedlings. In terms of soil properties, the combined strain treatment significantly increased total phosphorus content（by 4.35%）, available phosphorus content（by 10.58%）, and phosphatase activity（by 5.26%）in the soil. Moreover, the application of phosphorus-solubilizing bacteria significantly increased the Simpson index of rhizosphere soil bacteria, indicating enhanced microbial diversity, and led to a higher relative abundance of Proteobacteria, Acidobacteriota, and Bacteroidota. |
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