Pesticides Removal Using Plants: Phytodegradation Versus Phytostimulation

Schwitzguébel, Jean‐Paul; Meyer, J. R.; Kidd, Petra

doi:10.1007/978-1-4020-4999-4_13

Cited by 17 publications

(12 citation statements)

References 74 publications

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“…Plant root exudates have been shown to stimulate growth of lindane degrading bacterium Pseudomonas sp. augmenting lindane (γ-HCH) mineralisation in the rhizosphere (Schwitzguébel et al 2006). In this study, soil extractable C was significantly greater at the rhizosphere of Cytisus, and no reduction was observed in the presence of HCH contamination.…”

mentioning

confidence: 77%

“…Since plants are known to alter the microbial population, another possible explanation of this increase at the rhizosphere is that β-HCH and δ-HCH degrading microorganisms do not compete well in the rhizospheric zone in comparison with α-HCH or γ-HCH degraders. Finally, isomerisation of HCH can occur under biotic and abiotic conditions (Schwitzguébel et al 2006), and could possibly explain the formation of at least β-HCH.…”

Section: Discussionmentioning

confidence: 99%

“…The low water solubility and high hydrophobicity (logK OW 3.7-4.1; Willett et al 1998) of HCH isomers make their uptake and translocation within the plant unlikely. HCHs are more likely to be strongly adsorbed on the root epidermis (Calvelo Pereira et al 2006;Schwitzguébel et al 2006). In contrast, several bacterial strains (predominantly Sphingomonas strains) capable of degrading HCH isomers under aerobic conditions have been isolated from contaminated soils (Imai et al 1989;Böltner et al 2005;Mohn et al 2005;Phillips et al 2005).…”

Section: Introductionmentioning

confidence: 96%

“…Due to its widespread use, and strong persistence, residues of lindane and other HCH isomers are found all over the world in air, water, sediments and soils (Willett et al 1998;Schwitzguébel et al 2006). Although nowadays its use is restricted or completely banned in most countries, it continues to pose serious environmental and health concerns, particularly on highly contaminated former production or dumping sites (Lal et al 2006;Schwitzguébel et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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Rhizosphere microbial community and hexachlorocyclohexane degradative potential in contrasting plant species

et al. 2007

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The organochlorine 1,2,3,4,5,6 hexachlorocyclohexane (HCH) is a broad-spectrum insecticide that was used on a large-scale worldwide. The soilplant-microbe system and its influence on HCH biodegradation are evaluated. A greenhouse experiment was designed to evaluate HCH dissipation and several microbial parameters among rhizosphere and bulk soil of two contrasting plants, Cytisus striatus (Hill) Rothm and Holcus lanatus L. Plants were grown for 180 days in three treatments: uncontaminated soil (control), uncontaminated soil inoculated with soil (3% w/w) from a HCH-contaminated site (INOC), and uncontaminated soil inoculated with soil (3% w/w) from the HCH-contaminated site and artificially contaminated to obtain 100 mg HCH kg −1 dry soil (100HCH-INOC). At harvest, plant biomass, soil water-extractable organic C, pH and Cl concentration, rhizosphere microbial densities (total heterotrophs, ammonifiers, amylolytics) and C substrate utilization patterns, and degradation of α-, β-, δ-and γ-HCH isomers were determined in bulk and rhizosphere soils. Soil solution Cl concentration was determined every 30 days throughout the entire growth period. Results demonstrate that both Cytisus striatus and Holcus lanatus can grow in soils with up to 100 mg HCH kg −1 . An enhanced degradation of α-HCH, but not β-or δ-HCH, was observed in the rhizosphere. Significant changes in the microbial densities were observed between bulk and rhizosphere soils of Cytisus, and an increase in C source utilization indicated changes in community level physiological profiles (CLPP) in the rhizosphere of this species when grown in contaminated soils. HCH dissipation was also greater in soils planted with this species. In accordance, increases in soil extractable C, Cl concentration and acidity were greater at the rhizosphere of Cytisus. Concentration of Cl in soil solutions also indicates greater HCH dechlorination in soils planted with Cytisus than Holcus. Results suggest that phytostimulation of bacteria present or added to soil is a promising approach to cleaning HCHcontaminated sites, and especially for biodegradation of α-HCH.

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mentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Rhizosphere microbial community and hexachlorocyclohexane degradative potential in contrasting plant species

et al. 2007

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“…Vegetation growing on contaminated soil aids the dissipation of pollutants in several ways (Bacci et al 1990;Schroll et al 1994;Schwitzguebel et al 2002;Shimp et al 1993;Schwitzguébel et al 2006;Abhilash 2007). With respect to their direct roles in remediation processes, plants use several different strategies for dealing with environmental chemicals: phytoextraction, phytodegradation, phytovolatilization, and rhizodegradation (Schnoor 1997).…”

mentioning

confidence: 98%

Withania somnifera Dunal-mediated dissipation of lindane from simulated soil: implications for rhizoremediation of contaminated soil

Abhilash

Singh

2009

J Soils Sediments

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Cr(VI) and lindane removal by Streptomyces M7 is improved by maize root exudates

et al. 2017

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Environmental mixed pollution by both organic and inorganic compounds are detected worldwide. Phytoremediation techniques have been proposed as ecofriendly methods for cleaning up polluted sites. Several studies have demonstrated enhanced dissipation of contaminants at the root-soil interface through an increase in microbial activity caused by the release of plant root exudates (REs). The aim of this study was to evaluate the effectiveness for Cr(VI) and lindane removal by Streptomyces M7 cultured in a co-contaminated system in presence of maize REs. Our results showed when REs were added to the contaminated minimal medium (MM) as the only carbon source, microbial removal of Cr(VI) and lindane increased significantly in comparison to contaminant removal obtained in MM with glucose 1 g L . The maximum removal of 91% of lindane and 49.5% of Cr(VI) were obtained in the co-contaminated system. Moreover, Streptomyces M7 showed plant growth promoting traits which could improve plant performance in contaminated soils. The results presented in this study provide evidence that maize REs improved growth of Streptomyces M7 when REs were used as a carbon source in comparison to glucose. Consequently, lindane and Cr(VI) removal was considerably enhanced making evident the phytoremediation potential of the actinobacteria-plant partnership.

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Pesticides Removal Using Plants: Phytodegradation Versus Phytostimulation

Cited by 17 publications

References 74 publications

Rhizosphere microbial community and hexachlorocyclohexane degradative potential in contrasting plant species

Rhizosphere microbial community and hexachlorocyclohexane degradative potential in contrasting plant species

Withania somnifera Dunal-mediated dissipation of lindane from simulated soil: implications for rhizoremediation of contaminated soil

Cr(VI) and lindane removal by Streptomyces M7 is improved by maize root exudates

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