Sulphur transformation and deposition in the rhizosphere of Juncus effusus in a laboratory-scale constructed wetland

Wießner, Arndt; Kuschk, Peter; Jechorek, M.; Seidel, H.; Kästner, Matthias

doi:10.1016/j.envpol.2007.10.027

Cited by 31 publications

(14 citation statements)

References 29 publications

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“…However, high sulfide levels, in addition to those of other phytotoxins, may have contributed to the large scale Phragmites die-back in wetlands loaded with organic compounds (Armstrong and Armstrong, 2001), and to large-scale seagrass die-back events (Carlson et al, 1994; Terrados et al, 1999; Borum et al, 2005). Such massive die-off events have also been shown in constructed wetlands receiving high organic fluxes and showing high sulfide concentrations (above 1000 μmol L −1 ; Wiessner et al, 2008). …”

Section: Sulfide and Interspecific Interactions: Competition Facilitmentioning

confidence: 78%

Sulfide as a soil phytotoxin—a review

Lamers¹,

Govers²,

Janssen³

et al. 2013

Front. Plant Sci.

278

208

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In wetland soils and underwater sediments of marine, brackish and freshwater systems, the strong phytotoxin sulfide may accumulate as a result of microbial reduction of sulfate during anaerobiosis, its level depending on prevailing edaphic conditions. In this review, we compare an extensive body of literature on phytotoxic effects of this reduced sulfur compound in different ecosystem types, and review the effects of sulfide at multiple ecosystem levels: the ecophysiological functioning of individual plants, plant-microbe associations, and community effects including competition and facilitation interactions. Recent publications on multi-species interactions in the rhizosphere show even more complex mechanisms explaining sulfide resistance. It is concluded that sulfide is a potent phytotoxin, profoundly affecting plant fitness and ecosystem functioning in the full range of wetland types including coastal systems, and at several levels. Traditional toxicity testing including hydroponic approaches generally neglect rhizospheric effects, which makes it difficult to extrapolate results to real ecosystem processes. To explain the differential effects of sulfide at the different organizational levels, profound knowledge about the biogeochemical, plant physiological and ecological rhizosphere processes is vital. This information is even more important, as anthropogenic inputs of sulfur into freshwater ecosystems and organic loads into freshwater and marine systems are still much higher than natural levels, and are steeply increasing in Asia. In addition, higher temperatures as a result of global climate change may lead to higher sulfide production rates in shallow waters.

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Section: Sulfide and Interspecific Interactions: Competition Facilitmentioning

confidence: 78%

Sulfide as a soil phytotoxin—a review

Lamers¹,

Govers²,

Janssen³

et al. 2013

Front. Plant Sci.

278

208

View full text Add to dashboard Cite

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“…In our study, this is underlined by the significant differences of dissolved sulfide production and sulfate reduction between constructed wetlands with high DOC (CW+S and CW+CS) and constructed wetlands with lower DOC (CW+C, CW+CNS, and CW). Although physiological inhibition of several aquatic plants has been shown at dissolved sulfide concentrations of approximately 10 to 50 mg L −1 (Armstrong et al, 1996; Chambers et al, 1998; Wiessner et al, 2008a, 2008b), no mortality of Typha was observed. However, plant growth reduction and yellowing were observed (personal observation).…”

Section: Discussionmentioning

confidence: 99%

Simultaneous Removal of Nitrate and Sulfate from Greenhouse Wastewater by Constructed Wetlands

et al. 2013

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This study evaluated the effectiveness of C-enriched subsurface-flow constructed wetlands in reducing high concentrations of nitrate (NO) and sulfate (SO) in greenhouse wastewaters. Constructed wetlands were filled with pozzolana, planted with common cattail (), and supplemented as follows: (i) constructed wetland with sucrose (CW+S), wetland units with 2 g L of sucrose solution from week 1 to 28; (ii) constructed wetland with compost (CW+C), wetland units supplemented with a reactive mixture of compost and sawdust; (iii) constructed wetland with compost and no sucrose (CW+CNS) from week 1 to 18, and constructed wetland with compost and sucrose (CW+CS) at 2 g L from week 19 to 28; and (iv) constructed wetland (CW). During 28 wk, the wetlands received a typical reconstituted greenhouse wastewater containing 500 mg L SO and 300 mg L NO. In CW+S, CW+C, and CW+CS, appropriate C:N ratio (7:3.4) and redox potential (-53 to 39 mV) for denitrification resulted in 95 to 99% NO removal. Carbon source was not a limiting factor for denitrification in C-enriched constructed wetlands. In CW+S and CW+CS, the dissolved organic carbon (DOC)/SO ratios of 0.36 and 0.28 resulted in high sulfate-reducing bacteria (SRB) counts and high SO removal (98%), whereas low activities were observed at DOC/SO ratios of 0.02 (CW) to 0.11 (CW+C, CW+CNS). On week 19, when organic C content was increased by sucrose addition in CW+CS, SRB counts increased from 2.80 to 5.11 log[CFU+1] mL, resulting in a level similar to the one measured in CW+S (4.69 log[CFU+1] mL). Consequently, high sulfate reduction occurred after denitrification, suggesting that low DOC (38-54 mg L) was the limiting factor. In CW, DOC concentration (9-10 mg L) was too low to sustain efficient denitrification and, therefore, sulfate reduction. Furthermore, the high concentration of dissolved sulfides observed in CW+S and CW+CS treated waters were eliminated by adding FeCl.

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“…These macro‐gradient‐free systems allow for exploring rhizospheric processes under controlled ambient conditions (temperature, day/night regime). Several studies investigated the transformation processes of different macro elements, mainly sulfur and nitrogen, in these systems (Wiessner et al ., 2005; 2008). One PFR has been running for 5 years, with toluene as sole external carbon source showing stable degradation rates (Martínez‐Lavanchy et al ., ), which provided the opportunity to analyse the metabolic process of toluene degradation in a CW model system.…”

Section: Introductionmentioning

confidence: 97%

In situ protein‐SIP highlights Burkholderiaceae as key players degrading toluene by para ring hydroxylation in a constructed wetland model

Lünsmann

Kappelmeyer

Benndorf

et al. 2016

Environmental Microbiology

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In constructed wetlands, organic pollutants are mainly degraded via microbial processes. Helophytes, plants that are commonly used in these systems, provide oxygen and root exudates to the rhizosphere, stimulating microbial degradation. While the treatment performance of constructed wetlands can be remarkable, a mechanistic understanding of microbial degradation processes in the rhizosphere is still limited. We investigated microbial toluene removal in a constructed wetland model system combining 16S rRNA gene sequencing, metaproteomics and (13) C-toluene in situ protein-based stable isotope probing (protein-SIP). The rhizospheric bacterial community was dominated by Burkholderiales and Rhizobiales, each contributing about 20% to total taxon abundance. Protein-SIP data revealed that the members of Burkholderiaceae, the proteins of which showed about 73% of (13) C-incorporation, were the main degraders of toluene in the planted system, while the members of Comamonadaceae were involved to a lesser extent in degradation (about 64% (13) C-incorporation). Among the Burkholderiaceae, one of the key players of toluene degradation could be assigned to Ralstonia pickettii. We observed that the main pathway of toluene degradation occurred via two subsequent monooxygenations of the aromatic ring. Our study provides a suitable approach to assess the key processes and microbes that are involved in the degradation of organic pollutants in complex rhizospheric ecosystems.

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Sulphur transformation and deposition in the rhizosphere of Juncus effusus in a laboratory-scale constructed wetland

Cited by 31 publications

References 29 publications

Sulfide as a soil phytotoxin—a review

Sulfide as a soil phytotoxin—a review

Simultaneous Removal of Nitrate and Sulfate from Greenhouse Wastewater by Constructed Wetlands

In situ protein‐SIP highlights Burkholderiaceae as key players degrading toluene by para ring hydroxylation in a constructed wetland model

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