Related Experiment Video
Updated: Dec 25, 2025
06:42
Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment
Published on: July 22, 2019
6.9K
Exogenous phosphorus-solubilizing bacteria changed the rhizosphere microbial community indirectly
Jun Liu1, Wenyu Qi1, Qiang Li2,3
11Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237 China.
3 Biotech
|March 25, 2020
Summary
Phosphate-solubilizing bacteria (PSB) enhance tomato growth and soil nutrients. While PSB don't dominate, they indirectly alter soil microbial communities by releasing organic acids.
Area of Science:
- Agricultural Microbiology
- Soil Science
- Plant Nutrition
Background:
- Phosphate-solubilizing bacteria (PSB) are utilized as biofertilizers.
- The impact of PSB on soil microbial communities remains largely unknown.
Purpose of the Study:
- To investigate the effects of PSB inoculation on tomato growth and soil properties.
- To analyze the changes in the soil bacterial community structure following PSB application.
Main Methods:
- Tomato plants were treated with PSB alone or in combination with manure fertilizer.
- Growth parameters, soil physicochemical properties, and microbial community structure were analyzed.
- Quantitative PCR and high-throughput sequencing were used to assess bacterial populations.
Main Results:
- PSB combined with compost significantly improved tomato growth and yield.
- PSB application increased soil pH, available phosphorus, and trace elements.
- Inoculated PSB did not dominate the rhizosphere, but altered bacterial community structure, decreasing *Pseudomonas* and increasing *Bacillus*, *Anaerolineaceae*, *Cytophagaceae*, and *Gemmationadaceae*.
Conclusions:
- PSB can indirectly modify the rhizosphere microbial community by altering soil properties.
- Secreted organic acids by PSB contribute to phosphorus solubilization and soil property changes.
- PSB are effective in enhancing plant growth and nutrient availability without becoming dominant in the soil.
Related Concept Videos
01:30Environmental Applications of Microorganisms
819
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
819
02:11The Roles of Bacteria and Fungi in Plant Nutrition
46.4K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
46.4K
01:21The Phosphorus Cycle
43.4K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
43.4K
01:15Metabolism of Chemolithotrophs
639
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
639
00:46Bioremediation
21.9K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
21.9K
01:30Other Stress Responses in Bacteria
273
Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
273