In situ phytoremediation of PAH-contaminated soil by intercropping alfalfa (Medicago sativa L.) with tall fescue (Festuca arundinacea Schreb.) and associated soil microbial activity

Sun, Mingming; Dali, Fu; Teng, Ying; Shen, Yuanyuan; Luo, Yongming; Li, Zhengao; Christie, Peter

doi:10.1007/s11368-011-0382-z

Cited by 98 publications

(32 citation statements)

References 34 publications

(39 reference statements)

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“…While shaping microbial diversity by stimulating some microbial populations, plant root exudates could favor PAH degradation through rhizodegradation processes [11][12][13] and modify HM speciation, mobility, and availability [10] in the rhizosphere. Among different plant species used in rhizoremediation assays, alfalfa is described as tolerant to pollution and interesting for PAH remediation [14,15], similarly to other legumes such as red lentil [16]. A contribution of mycorrhizal colonization of plant roots to PAH dissipation [17] and HM tolerance [18] has also been shown.…”

Section: Introductionmentioning

confidence: 99%

The Bacterial and Fungal Diversity of an Aged PAH- and Heavy Metal-Contaminated Soil is Affected by Plant Cover and Edaphic Parameters

Bourceret

Cébron

Tisserant³

et al. 2015

Microb Ecol

107

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Industrial wasteland soils with aged PAH and heavy metal contaminations are environments where pollutant toxicity has been maintained for decades. Although the communities may be well adapted to the presence of stressors, knowledge about microbial diversity in such soils is scarce. Soil microbial community dynamics can be driven by the presence of plants, but the impact of plant development on selection or diversification of microorganisms in these soils has not been established yet. To test these hypotheses, aged-contaminated soil samples from a field trial were collected. Plots planted with alfalfa were compared to bare soil plots, and bacterial and fungal diversity and abundance were assessed after 2 and 6 years. Using pyrosequencing of 16S rRNA gene and ITS amplicons, we showed that the bacterial community was dominated by Proteobacteria, Actinobacteria, and Bacteroidetes and was characterized by low Acidobacteria abundance, while the fungal community was mainly represented by members of the Ascomycota. The short-term toxic impact of pollutants usually reduces the microbial diversity, yet in our samples bacterial and fungal species richness and diversity was high suggesting that the community structure and diversity adapted to the contaminated soil over decades. The presence of plants induced higher bacterial and fungal diversity than in bare soil. It also increased the relative abundance of bacterial members of the Actinomycetales, Rhizobiales, and Xanthomonadales orders and of most fungal orders. Multivariate analysis showed correlations between microbial community structure and heavy metal and PAH concentrations over time, but also with edaphic parameters (C/N, pH, phosphorus, and nitrogen concentrations).

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Section: Introductionmentioning

confidence: 99%

The Bacterial and Fungal Diversity of an Aged PAH- and Heavy Metal-Contaminated Soil is Affected by Plant Cover and Edaphic Parameters

Bourceret

Cébron

Tisserant³

et al. 2015

Microb Ecol

107

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“…It was found that intercropping may increase yields (Zhang et al 2011), income (Yildirim andGuvenc 2005, Singh et al 2013), availability of plant-nutrients (Betencourt et al 2012), reduce the occurrence of diseases (Gomez-Rodriguez et al 2003), suppress weeds (Sharma and Banik 2013), and decrease the demands for fertilization and use of pesticides (Carruthers et al 2000). It can be a helpful tool for soil remediation (Sun et al 2011) and reduction of wind erosion (Chen et al 2010). The effective examples of tree-based intercropping and agroforestry systems could be added to this list too (Rivest et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Intercropped red beet and radish with green bean affected microbial communities and nodulation by indigenous rhizobia

Ugrinović¹,

Mijatovic²,

Zdravković³

et al. 2014

AFSci

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The impact of intercropping green bean (Phaseolus vulgaris L.) with red beet (Beta vulgaris L. var. rubra) and radish (Raphanus sativus L.), two non-legume plants, on the plants' yields, as well as the effect on occurrence and enumeration of microorganisms in the rhizosphere was studied. The intercrop efficacy evaluation, using Land equivalent ratio, revealed values above 1.0 for all intercropped treatments. Diversity of rhizobia from green bean nodules under different intercropping and fertilizing conditions was observed. On the basis of morphological and biochemical characteristics, 67 out of 158 isolates from green bean roots were selected as rhizobia (42.4%), confirmed by detection of 780 bp nifH gene fragments in nifH-PCR, and then clustered in 27 phenotype patterns. Production of exopolysaccharide succinoglycan was observed in 23 rhizobial isolates, while 6 were detected to solubilize tricalcium phosphate. Screening of genetic diversity using (GTG) 5 -PCR fingerprinting showed presence of six different patterns on the 92% similarity level.

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“…In situ phytoremediation by intercropping alfalfa (Medicago sativa L) with tall fescue (Festuca arundinacea Schreb. ), Salix caprea and Arabidopsis halleri indicates that intercropping is a promising bioremediation strategy (Wieshammer et al 2007;An et al 2011;Sun et al 2011;Gomes et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Repeated Phytoextraction of Cadmium and Zinc from an Agricultural Soil Contaminated with Sewage Sludge

Luo

Liu

et al. 2015

International Journal of Phytoremediation

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Long-term application of sewage sludge resulted in soil cadmium (Cd) and zinc (Zn) contamination in a pot experiment conducted to phytoextract Cd/Zn repeatedly using Sedum plumbizincicola and Apium graceolens in monoculture or intercropping mode eight times. Shoot yields and soil physicochemical properties changed markedly with increasing number of remediation crops when the two plant species were intercropped compared with the unplanted control soil and the two monoculture treatments. Changes in soil microbial indices such as average well colour development, soil enzyme activity and soil microbial counts were also significantly affected by the growth of the remediation plants, especially intercropping with S. plumbizincicola and A. graveolens. The higher yields and amounts of Cd taken up indicated that intercropping of the hyperaccumulator and the vegetable species may be suitable for simultaneous agricultural production and soil remediation, with larger crop yields and higher phytoremediation efficiencies than under monoculture conditions.

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In situ phytoremediation of PAH-contaminated soil by intercropping alfalfa (Medicago sativa L.) with tall fescue (Festuca arundinacea Schreb.) and associated soil microbial activity

Cited by 98 publications

References 34 publications

The Bacterial and Fungal Diversity of an Aged PAH- and Heavy Metal-Contaminated Soil is Affected by Plant Cover and Edaphic Parameters

The Bacterial and Fungal Diversity of an Aged PAH- and Heavy Metal-Contaminated Soil is Affected by Plant Cover and Edaphic Parameters

Intercropped red beet and radish with green bean affected microbial communities and nodulation by indigenous rhizobia

Efficiency of Repeated Phytoextraction of Cadmium and Zinc from an Agricultural Soil Contaminated with Sewage Sludge

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