Removal of fluoride in aqueous medium under the optimum conditions through intracellular accumulation in <i>Bacillus flexus</i> (PN4)

Thesai, Annadurai Sakthi; Rajakumar, S.; Ayyasamy, P. M.

doi:10.1080/09593330.2018.1523951

Cited by 15 publications

(2 citation statements)

References 34 publications

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“…The present findings are consistent with the study of Islam et al (2014) , who revealed that P. aeruginosa treatment enhances the absorption of P and N in wheat plants. According to Sakthi Thesai et al (2018) , the Bacillus flexus (PN4) strain has the ability to produce drinking water that is free of fluoride and may also be used to create a new approach for bioremediation.…”

Section: Discussionmentioning

confidence: 99%

Tomato seed bio-priming with Pseudomonas aeruginosa strain PAR: a study on plant growth parameters under sodium fluoride stress

Singh,

Patani,

Patel

et al. 2024

Front. Microbiol.

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The primary goal of this experiment is to examine the effectiveness of Pseudomonas aeruginosa strain PAR as a rhizobacterium that promotes plant growth in mitigating the negative effects of fluoride-induced stress in tomato (Lycopersicon esculentum Mill.) plants. A total of 16 rhizobacterial strains were tested for plant growth-promoting (PGP) attributes, with isolates S1, S2, and S3 exhibiting different characteristics. Furthermore, growth kinetics studies revealed that these isolates were resilient to fluoride stress (10, 20, 40, and 80 ppm), with isolate S2 exhibiting notable resilience compared to the other two strains. Phylogenetic analysis revealed isolate S2 as P. aeruginosa strain PAR. Physiological analyses demonstrated that P. aeruginosa strain PAR had a beneficial impact on plant properties under fluoride stress, comprising seed germination, root length, shoot height, relative water content, and leaf area, the strain also impacted the buildup of glycine betaine, soluble sugar, and proline, demonstrating its significance in enhancing plant stress tolerance. In P. aeruginosa strain PAR-treated plants, chlorophyll content increased while malondialdehyde (MDA) levels decreased, indicating enhanced photosynthetic efficiency and less oxidative stress. The strain modified antioxidant enzyme action (catalase, ascorbate, glutathione reductase, peroxidase, and superoxide dismutase), which contributed to improved stress resilience. Mineral analysis revealed a decrease in sodium and fluoride concentrations while increasing magnesium, potassium, phosphorus, and iron levels, emphasizing the strain’s significance in nutrient management. Correlation and principal component analysis revealed extensive correlations between physiological and biochemical parameters, underscoring P. aeruginosa strain PAR’s multifaceted impact on plant growth and stress response. This study offers valuable information on effectively utilizing PGPR, particularly P. aeruginosa strain PAR, in fluoride-contaminated soils for sustainable agriculture. It presents a promising biological strategy to enhance crop resilience and productivity.

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Section: Discussionmentioning

confidence: 99%

Tomato seed bio-priming with Pseudomonas aeruginosa strain PAR: a study on plant growth parameters under sodium fluoride stress

Singh,

Patani,

Patel

et al. 2024

Front. Microbiol.

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“…The bacterium Bacillus flexus (PN4) may be a promising strain for defluorinating drinking water, and it may offer a perfect opportunity to develop a novel bioremediation method, according to the findings of a study by Sakthi Thesai et al (2018). The bacterium might be crucial in the process of removing F from aqueous medium.…”

Section: Enzymatic Modification For Fluoride Tolerancementioning

confidence: 99%

The role of plant growth promoting rhizobacteria in strengthening plant resistance to fluoride toxicity: a review

Singh,

Yadav,

Gautam

et al. 2023

Front. Microbiol.

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A wide variety of bacteria are present in soil but in rhizospheric area, the majority of microbes helps plant in defending diseases and facilitate nutrient uptake. These microorganisms are supported by plants and they are known as plant growth-promoting rhizobacteria (PGPR). The PGPRs have the potential to replace chemical fertilizers in a way that is more advantageous for the environment. Fluoride (F) is one of the highly escalating, naturally present contaminants that can be hazardous for PGPRs because of its antibacterial capacity. The interactions of F with different bacterial species in groundwater systems are still not well understood. However, the interaction of PGPR with plants in the rhizosphere region reduces the detrimental effects of pollutants and increases plants’ ability to endure abiotic stress. Many studies reveal that PGPRs have developed F defense mechanisms, which include efflux pumps, Intracellular sequestration, enzyme modifications, enhanced DNA repair mechanism, detoxification enzymes, ion transporter/antiporters, F riboswitches, and genetic mutations. These resistance characteristics are frequently discovered by isolating PGPRs from high F-contaminated areas or by exposing cells to fluoride in laboratory conditions. Numerous studies have identified F-resistant microorganisms that possess additional F transporters and duplicates of the well-known targets of F. Plants are prone to F accumulation despite the soil’s low F content, which may negatively affect their growth and development. PGPRs can be used as efficient F bioremediators for the soil environment. Environmental biotechnology focuses on creating genetically modified rhizobacteria that can degrade F contaminants over time. The present review focuses on a thorough systemic analysis of contemporary biotechnological techniques, such as gene editing and manipulation methods, for improving plant-microbe interactions for F remediation and suggests the importance of PGPRs in improving soil health and reducing the detrimental effects of F toxicity. The most recent developments in the realm of microbial assistance in the treatment of F-contaminated environments are also highlighted.

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Bacterial Treatment of Industrial Wastewaters

Saran,

Devi,

Saratale

et al. 2024

Microbes Based Approaches for the Management of Hazardous Contaminants

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Removal of fluoride in aqueous medium under the optimum conditions through intracellular accumulation in Bacillus flexus (PN4)

Cited by 15 publications

References 34 publications

Tomato seed bio-priming with Pseudomonas aeruginosa strain PAR: a study on plant growth parameters under sodium fluoride stress

Tomato seed bio-priming with Pseudomonas aeruginosa strain PAR: a study on plant growth parameters under sodium fluoride stress

The role of plant growth promoting rhizobacteria in strengthening plant resistance to fluoride toxicity: a review

Bacterial Treatment of Industrial Wastewaters

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