Responses of oil degrader enzyme activities, metabolism and degradation kinetics to bean root exudates during rhizoremediation of crude oil contaminated soil

Yang, Kwang Mo; Poolpak, Toemthip; Pokethitiyook, Prayad; Kruatrachue, Maleeya; Saengwilai, Patompong

doi:10.1080/15226514.2021.1926912

Cited by 13 publications

(3 citation statements)

References 37 publications

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“…While not all the compounds that may influence biodegradation are derived from roots, the results of this study show that the presence of plant can significantly influence biodegradation of hydrocarbon pollutants through such root exudation as organic acids, amino acids, soluble sugars and terpenoids. Interestingly, in a recent study of the effects of root exudates on enzymatic activities of two oil degraders, Micrococcus luteus WN01 and Bacillus cereus W2301, Yang, et al 52 found that root exudates led to an increase in microbial population and dehydrogenase activity, and resulted in maximized removal of TPHs and PAHs. The relationship between root exudates and biodegradation observed in this study confirms the hypothesis that root exudates are ecological drivers of rhizodegradation.…”

Section: Discussionmentioning

confidence: 99%

Elucidating the significant roles of root exudates in organic pollutant biotransformation within the rhizosphere

Eze,

Amuji

2024

Sci Rep

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Biotransformation of organic pollutants is crucial for the dissipation of environmental pollutants. While the roles of microorganisms have been extensively studied, the significant contribution of various root exudates are still not very well understood. Through plant growth experiment, coupled with gas and liquid chromatography-mass spectrometry methods, this study examined the effect of the presence of M. sativa on microbial-associated biochemical transformation of petroleum hydrocarbons. The results of this study revealed that the concentration of exudates within the soil matrix is a function of proximity to root surfaces. Similarly, biodegradation was found to correlate with distance from roots, ranging from ≥ 90% within the rhizosphere to < 50% in bulk soil and unplanted control soil. Most importantly, for the first time in a study of an entire petroleum distillate, this study revealed a statistically significant negative correlation between root exudate concentration and residual total petroleum hydrocarbons. While not all the compounds that may influence biodegradation are derived from roots, the results of this study show that the presence of plant can significantly influence biodegradation of hydrocarbon pollutants through such root exudation as organic acids, amino acids, soluble sugars and terpenoids. Therefore, root exudates, including secondary metabolites, offer great prospects for biotechnological applications in the remediation of organic pollutants, including recalcitrant ones.

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Section: Discussionmentioning

confidence: 99%

Elucidating the significant roles of root exudates in organic pollutant biotransformation within the rhizosphere

Eze,

Amuji

2024

Sci Rep

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“…Although phytoremediation is a broadly deployed and cost-effective method for the remediation of soils polluted with petroleum-derived products, it is not effective enough to significantly stimulate the biochemical activity of soils under the pressure of these xenobiotics. [ 129 ]. From an environmental perspective, it is essential to search for innovative remediation technologies useful for environments polluted with petroleum products [ 8 , 42 , 43 ] that are non-invasive and ecologically friendly [ 44 , 47 ].…”

Section: Discussionmentioning

confidence: 99%

The Usability of Sorbents in Restoring Enzymatic Activity in Soils Polluted with Petroleum-Derived Products

et al. 2023

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Due to their ability to adsorb or absorb chemical pollutants, including organic compounds, sorbents are increasingly used in the reclamation of soils subjected to their pressure, which results from their high potential in eliminating xenobiotics. The precise optimization of the reclamation process is required, focused primarily on restoring the condition of the soil. This research are essential for seeking materials sufficiently potent to accelerate the remediation process and for expanding knowledge related to biochemical transformations that lead to the neutralization of these pollutants. The goal of this study was to determine and compare the sensitivity of soil enzymes to petroleum-derived products in soil sown with Zea mays, remediated using four sorbents. The study was conducted in a pot experiment, with loamy sand (LS) and sandy loam (SL) polluted with VERVA diesel oil (DO) and VERVA 98 petrol (P). Soil samples were collected from arable lands, and the effects of the tested pollutants were compared with those used as control uncontaminated soil samples in terms of Zea mays biomass and the activity of seven enzymes in the soil. The following sorbents were applied to mitigate DO and P effects on the test plants and enzymatic activity: molecular sieve (M), expanded clay (E), sepiolite (S), and Ikasorb (I). Both DO and P exerted a toxic effect on Zea mays, with DO more strongly disturbing its growth and development and the activities of soil enzymes than P. In sandy clay (SL), P was found to be a significant inhibitor of dehydrogenases (Deh), catalase (Cat), urease (Ure), alkaline phosphatase (Pal), and arylsulfatase (Aryl) activities, while DO stimulated the activity of all enzymes in this soil. The study results suggest that the sorbents tested, mainlya molecular sieve, may be useful in remediating DO-polluted soils, especially when alleviating the effects of these pollutants in soils of lower agronomic value.

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“…On this basis, the following chemical, biological (phytoremediation, biosorption, and bioaccumulation, bioreactors, biostimulation, composting, bioleaching, bioventing), and physicochemical (landfill, acid leaching, electroreclamation, excavation, thermal treatment) methods have been elaborated (Ali et al 2021 ). The problematic pollutants removed from soil include HMs (heavy metals), PCBs (polychlorinated biphenyls), PAHs (polycyclic aromatic hydrocarbons), PFRs (persistent free radicals), VOCs (volatile organic compounds), pesticides, petroleum hydrocarbons, and oils (Yang et al 2022 ; Ren et al 2018 ; Terzaghi et al 2020 ; Uribe et al 2022 ; Rostami et al 2021 ; Ying et al 2007 ).…”

Section: Soil Pollutionmentioning

confidence: 99%

The combined rhizoremediation by a triad: plant-microorganism-functional materials

Mikulewicz

Μουστάκας

2023

Environ Sci Pollut Res

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The article describes new strategies for the remediation of soils contaminated with organic and inorganic pollutants. The aim of this study is to investigate the synergistic effects of combining plant-microorganism-functional materials for a more effective reduction of soil contamination with toxic chemicals. The innovative triad involves functional materials as a habitat for microorganisms, which helps to control the release of pollutants into the soil solution from the adsorbed form. This, in turn, reduces the toxic effect on microorganisms and plants. Microorganisms play a complex role, consisting of partial biodegradation of pollutants, stimulation of plant growth, and support for nutrient supply. Plants synthesize root exudates that facilitate microorganisms in biodegrading organic pollutants and stimulate their growth. The plant takes up pollutants through the root system, which can be further supported by endophytic microorganisms. The cooperation of the three players produces a synergistic effect that enhances the effectiveness of rhizodegradation supported by functional materials, which is more effective than using microorganisms, phytoremediation, or functional materials alone. The combination of physicochemical methods (functional materials) and microbiological methods (bacteria and fungi, rhizosphere, symbiotic and non-symbiotic) supported by plants (hyperaccumulators) is a promising approach for reducing chemicals from soil. Key examples of the synergistic effects of combining plant-microorganism-functional materials have been provided in this article.

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Responses of oil degrader enzyme activities, metabolism and degradation kinetics to bean root exudates during rhizoremediation of crude oil contaminated soil

Cited by 13 publications

References 37 publications

Elucidating the significant roles of root exudates in organic pollutant biotransformation within the rhizosphere

Elucidating the significant roles of root exudates in organic pollutant biotransformation within the rhizosphere

The Usability of Sorbents in Restoring Enzymatic Activity in Soils Polluted with Petroleum-Derived Products

The combined rhizoremediation by a triad: plant-microorganism-functional materials

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