Biochar loaded with bacteria enhanced Cd/Zn phytoextraction by facilitating plant growth and shaping rhizospheric microbial community.

Cadmium-resistant phosphate-solubilizing bacteria immobilized on phosphoric acid-ball milling modified biochar enhances soil cadmium passivation and phosphorus bioavailability.

Biochar-immobilized Bacillus megaterium enhances Cd immobilization in soil and promotes Brassica chinensis growth.

The present study highlights heavy metal tolerance, EPS production, and biosorption capacity of four hydrothermal vent bacterial strains, namely Exiguobacterium aquaticum, Mammaliicoccus sciuri, Micrococcus luteus, and Jeotgalicoccus huakuii against As, Cd, Cr, Cu, Co, Pb and Ni. The biosorption assay showed high removal efficiency of As (83%) by E. aquaticum, Cd (95%) by M. sciuri, Cu (94%) by M. luteus, and Ni (89%) by J. huakuii and their produced EPS with these metals in aqueous solution were 84%, 85%, 98%, and 91%, respectively. The maximum EPS yield was attained by optimized medium composition consisting of 1% Xylose, and 1% NaCl at pH 7. In metal-amended conditions, the four bacterial strains showed induced EPS production in the initial concentrations. SEM with EDX and CLSM images showed that the growth and EPS production of bacterial strains were affected by metal ion concentrations. A phenol sulphuric acid method and BCA assay were used to identify both the carbohydrate and total protein content of four extracted EPS. A DPPH assay revealed that EPS influences free radical scavenging and has a highly enhanced synergistic effect with its antioxidant activity. FT-IR analysis of four extracted EPS showed the shifting of peaks in the functional groups of EPS before and after adsorption of metal ions. At pH 5 and after 60 min contact time metal removal efficiency and adsorption capacity increased as calculated for As, Cd, Cu, and Ni by four extracted EPS: (86%, 20 mg/g), (74%, 19 mg/g), (94%, 60 mg/g) and (89%, 32 mg/g) and (89%, 16 mg/g), (85%, 16 mg/g), (96%, 22 mg/g) and (91%, 16 mg/g), respectively. The Langmuir compared to the Freundlich model was found to better represent the adsorption by EPS providing maximum adsorption capacities for As (34.65 mg/g), Cd (52.88 mg/g), Cu (24.91 mg/g), and Ni (58.38 mg/g). 

Heavy metal tolerance, and metal biosorption by exopolysaccharides produced by bacterial strains isolated from marine hydrothermal vents.

Phosphorus (P) is a macronutrient that plants need to grow. However, most of the soil’s phosphorus is still insoluble, making it difficult for plants to absorb. This creates a barrier to ecologically responsible farming methods and calls for innovative approaches to phosphorus solubilization. Solublizing microorganisms improve the availability of phosphorous in soil. The term “phosphorus-solubilizing microorganisms” (PSMs) describes various fungi or bacteria that divide the phosphorus into more soluble forms. It shows how PSMs interact with plants and their processes to solubilize phosphorus. Soil pH, temperature, and nutrient availability are only a few parameters affecting its activity. PSMs are investigated for their potential to increase plant phosphorus absorption and use, thereby boosting agricultural yield and nutrient usage efficiency. The use of PSMs and their effects on the environment are also evaluated. By using PSMs, farmers may use less chemical phosphorus fertilizers that contribute to runoff and eutrophication in waterways. Furthermore, PSMs may improve soil structure, decrease nutrient losses, and increase nutrient cycling, all of which contribute to soil health and the long-term viability of agricultural systems. Phosphorus-solubilizing microorganisms have enormous promise in environmentally responsible farming and land management. Better phosphorus availability, greater agricultural output, less pollution, and better soil health are all possible outcomes of using PSMs. However, further study is required to determine the best application strategies, formulations, and choices of PSMs for various soil and plant systems. Incorporating PSMs into agricultural operations can potentially improve environmental sustainability and resilience. This article will explore the potential of PSMs in addressing critical environmental challenges, including soil erosion, nutrient runoff, sustainable farming practices, and resource conservation. The potential of phosphorus-solubilizing microorganisms (PSMs) to address important environmental issues about soil fertility and agricultural practices is examined in this article. A vital macronutrient for plant growth, phosphorus is frequently found in soil in insoluble forms, restricting the amount of phosphorus that plants may access. PSMs, which comprise a variety of bacteria and fungi, are essential in solubilizing phosphorus and increasing its availability to plants. Discussed are the relationships that PSMs have with plants and the variables that affect PSM activity, such as temperature, nutrient availability, and pH of the soil. The potential of PSMs to increase plant phosphorus uptake, boost agricultural productivity, and improve nutrient utilization efficiency is highlighted in the study. PSMs provide a more ecologically friendly option to chemical phosphorus fertilizers by decreasing river runoff and eutrophication. The paper also discusses the possible advantages of PSMs, which include better soil structure, less nutrient losses, and increased nutrient cycling, all of which support the sustainability of agricultural systems and general soil health. Although the article notes that the results have been encouraging, it also acknowledges that further research is required to determine the best ways to apply, formulate, and select plant soil amendments (PSMs) appropriate for different plant and soil systems. PSM integration is considered a viable path toward environmental resilience and sustainability, successfully tackling issues like resource conservation, nutrient runoff, and soil erosion. The potential of phosphorus-solubilizing microorganisms (PSMs) to address important environmental issues about soil fertility and agricultural practices is examined in this article. A vital macronutrient for plant growth, phosphorus is frequently found in soil in insoluble forms, restricting the amount of phosphorus that plants may access. PSMs, which comprise a variety of bacteria and fungi, are essential in solubilizing phosphorus and increasing its availability to plants. Discussed are the relationships that PSMs have with plants and the variables that affect PSM activity, such as temperature, nutrient availability, and pH of the soil. The potential of PSMs to increase plant phosphorus uptake, boost agricultural productivity, and improve nutrient utilization efficiency is highlighted in the study. PSMs provide a more ecologically friendly option to chemical phosphorus fertilizers by decreasing river runoff and eutrophication. The paper also discusses the possible advantages of PSMs, which include better soil structure, less nutrient losses, and increased nutrient cycling, all of which support the sustainability of agricultural systems and general soil health. Although the article notes that the results have been encouraging, it also acknowledges that further research is required to determine the best ways to apply, formulate, and select plant soil amendments (PSMs) appropriate for different plant and soil systems. PSM integration is considered a viable path toward environmental resilience and sustainability, successfully tackling issues like resource conservation, nutrient runoff, and soil erosion.

Ecological and sustainable implications of phosphorous-solubilizing microorganisms in soil

Improving radish phosphorus utilization efficiency and inhibiting Cd and Pb uptake by using heavy metal-immobilizing and phosphate-solubilizing bacteria.

Exopolysaccharide-producing strains alter heavy metal fates and bacterial communities in soil aggregates to reduce metal uptake by pakchoi

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Improving radish phosphorus utilization efficiency and inhibiting Cd and Pb uptake by using heavy metal-immobilizing and phosphate-solubilizing bacteria.

Exopolysaccharide-producing strains alter heavy metal fates and bacterial communities in soil aggregates to reduce metal uptake by pakchoi