Microbial biosurfactants: An eco-friendly perspective for soil health management and environmental remediation

Sharma, Pankaj; Sangwan, Seema; Singh, Sushila; Kaur, Harpreet

doi:10.1016/b978-0-323-85579-2.00006-x

Cited by 5 publications

(3 citation statements)

References 80 publications

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“…Additionally, they have a variety of beneficial impacts on seeds, including antifungal, antibacterial, and antiviral activities, improve the bioavailability of nutrients for plants, and play an important role in enhancing the microbial-plant interaction beneficial to plants [ 5 , 6 ]. Furthermore, biosurfactants have the potential as bioremediation agents to improve the health of soil systems by increasing the solubility of harmful and remaining pesticides, which can make them available for biodegradation by other microorganisms [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

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Promoting Seed Germination of Some Plant Species by Rhamnolipid Produced by Pseudomonas aeruginosa

Ghazi Faisal

2024

Scientifica

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With growing environmental concerns and a growing world population, there is an interest in developing cheap, efficient, and environmentally friendly substances that benefit humanity. Microbial surfactants are nontoxic, biodegradable bioproducts that provide sustainable solutions in agricultural applications due to their many benefits over their synthetic counterparts. Hence the crucial importance of scientific research to understand the effect of microbial surfactants on plant development. The present study aimed to assess the effect of rhamnolipid produced by Pseudomonas aeruginosa on seed germination of wheat (Triticum aestivum), barley (Hordeum vulgare), okra (Abelmoschus esculentus), onion (Allium cepa), and lettuce (Lactuca sativa) under laboratory conditions. The results showed that P. aeruginosa was capable of producing 3.83 g/L of viscous, honey-colored rhamnolipid, which was capable of lowering the surface tension to 30 ± 0.33 mN/m. Different concentrations of rhamnolipid ranging from 0.25 to 1.00 g/L were assessed, with distilled water acting as a control. After treatment of seeds, results showed that applying 0.25 g/L of rhamnolipid can significantly increase seed germination to 100% on the fourth day of sowing okra and lettuce, and on the fifth day of sowing onion seeds, compared to control groups that recorded 60%, 50%, and 55%, respectively. In wheat and barley seeds, applying rhamnolipid can protect seeds from pathogenic fungi while delaying their germination to 60% and 70% on the third day of sowing, while 90% and 100% have been reported in the control groups. Thus, this biological molecule demonstrates promising results in enhancing seed germination of the studied species by protecting them from phytopathogens and then aiding plant growth.

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Section: Introductionmentioning

confidence: 99%

“…Furthermore, biosurfactants have the potential as bioremediation agents to improve the health of soil systems by increasing the solubility of harmful and remaining pesticides, which can make them available for biodegradation by other microorganisms [7].…”

Section: Introductionmentioning

confidence: 99%

Promoting Seed Germination of Some Plant Species by Rhamnolipid Produced by Pseudomonas aeruginosa

Ghazi Faisal

2024

Scientifica

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“…These biosurfactants reduce interfacial or surface tension depending on the interface (air/water or oil/water) [21]. The biosurfactant develops a new surface at the water/oil interface by producing a monolayer around the hydrocarbon particle directed by the surfactant, with the surfactant's hydrophobic tail facing out to the liquid phase [22]. It causes elevations in the facilitation of emulsification and surface area.…”

Section: Introductionmentioning

confidence: 99%

Isolation of Biosurfactant-Producing Bacteria and Their Co-Culture Application in Microbial Fuel Cell for Simultaneous Hydrocarbon Degradation and Power Generation

et al. 2022

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Biosurfactant-producing microorganisms improve the efficacy of hydrocarbon biodegradation as the biosurfactant is essential in making hydrocarbons available for breakdown. The present study reports the isolation of biosurfactant-producing bacteria that can be used for crude oil remediation and to characterize the biosurfactant generated during the breakdown of crude oil. This study also reports evaluating the synergism and potentiality of biosurfactant-producing bacteria for simultaneous hydrocarbon biodegradation and power generation. Two bacterial strains (Bacillus subtilis strain B1 and Pseudomonas aeruginosa strain B2) were isolated from petroleum-contaminated soils, which are found effective in producing biosurfactants and degrading crude oil as the sole carbon source. B. subtilis B1 exhibited a higher potential for biosurfactant production and crude oil degradation than P. aeruginosa B2. The FTIR and GC-MS analysis were conducted for further characterization of the biosurfactant, which revealed that the surfactant produced by strain B1 and B2 was surfactin and rhamnolipid, respectively. The application of the B1 and B2 co-culture in microbial fuel cells (MFCs) showed synergism among them and resulted in a maximum power density production of 6.3 W/m3 with an open circuit voltage of 970 mV while degrading 2.5% v/v crude oil containing anolyte. The findings indicate that the co-culture of isolated crude oil-degrading strains has great potential for enhanced power generation and the bioremediation of hydrocarbon-contaminated environments. Moreover, the synergism of isolated strains in MFCs suggested their potent applicability in environmental, energy, and industrial sectors as an economical and feasible alternative to the existing technologies.

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Biosurfactants and Their Benefits for Seeds

Simões¹,

Fernandes²,

Santos³

et al. 2023

Advancements in Biosurfactants Research

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Microbial biosurfactants: An eco-friendly perspective for soil health management and environmental remediation

Cited by 5 publications

References 80 publications

Promoting Seed Germination of Some Plant Species by Rhamnolipid Produced by Pseudomonas aeruginosa

Promoting Seed Germination of Some Plant Species by Rhamnolipid Produced by Pseudomonas aeruginosa

Isolation of Biosurfactant-Producing Bacteria and Their Co-Culture Application in Microbial Fuel Cell for Simultaneous Hydrocarbon Degradation and Power Generation

Biosurfactants and Their Benefits for Seeds

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