Differential responses of the freshwater wetland species Juncus effusus L. and Caltha palustris L. to iron supply in sulfidic environments

Welle, Marlies E.W. van der; Niggebrugge, Karla; Lamers, Leon P. M.; Roelofs, J.G.M.

doi:10.1016/j.envpol.2006.08.024

Cited by 28 publications

(18 citation statements)

References 45 publications

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“…Sulfur concentrations in shoots of terrestrial plants are, on average 30 μmol g −1 (Gruhlke and Slusarenko, 2012), but values may be higher for freshwater wetland plants (35–150 μmol g −1 , Van der Welle et al, 2007a,b) and marine plants (100–400 μmol g −1 ; Holmer and Kendrick, 2013), most probably related to the level of S availability in the different environments, but possibly also as a result of the presence of sulfides in the soil. Sulfate is actively taken up by roots and distributed in the plant, with transport through membranes by proton-sulfate co-transporters driven by a proton gradient (Trust and Fry, 1992; Leustek and Saito, 1999).…”

Section: Sulfur Uptake and Internal Detoxificationmentioning

confidence: 99%

Sulfide as a soil phytotoxin—a review

Lamers¹,

Govers²,

Janssen³

et al. 2013

Front. Plant Sci.

287

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: Sulfur Uptake and Internal Detoxificationmentioning

confidence: 99%

Sulfide as a soil phytotoxin—a review

Lamers¹,

Govers²,

Janssen³

et al. 2013

Front. Plant Sci.

287

208

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“…Under anaerobic circumstances, for instance during flooding, sulphate is reduced to sulphide in the absence of more favourable electron acceptors such as oxygen or nitrate. Free sulphide can be very toxic to wetland plant species, as has for instance been shown for Stratiotes aloides (Smolders and Roelofs 1996) and Caltha palustris (Van der Welle et al 2007). However, sulphide has a high affinity for binding to iron, which decreases the availability of free sulphide and hence its toxicity (Van der Welle et al 2006).…”

Section: Introductionmentioning

confidence: 95%

How soil characteristics and water quality influence the biogeochemical response to flooding in riverine wetlands

et al. 2007

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Although phosphate concentrations have been reduced, the rivers Meuse and Rhine are still polluted with sulphate, which most probably affects vegetation development in newly created riverine wetlands. The influence of flooding with river water rich in sulphate was tested on three soil types from floodplains of the river Meuse using flow-through and batch experiments. Soils were selected for contrasting concentrations of iron and organic matter and originated from a floating fen (iron-poor, organic), an alder carr (iron-rich, organic) and a clay pit (ironrich, low in organic matter). Flooding induced mobilisation of phosphate. Sulphate only enhanced this effect in the alder carr soil, where sulphide and phosphate competed for binding to iron. Only in the floating fen soil did the addition of sulphate result in the formation of free sulphide, which reduced the growth of Glyceria maxima, serving as a phytometer. In addition, the floating soil started to sink, due to falling methane concentrations. In the different soil types methane production was hampered by the presence of more favourable electron acceptors such as sulphate in the water and Fe(III) in the soil. It was concluded that the effects of inundation with sulphate-polluted water strongly depend on the soil type: under iron-poor circumstances, free sulphide may accumulate, leading to phytotoxicity, while in soils rich in iron, sulphide toxicity is prevented, but phosphate availability may be increased. In addition, shortage of easily degradable organic matter can limit the formation of potential toxicants such as ammonium, iron and sulphide. Results are discussed in terms of their implications for nature management.

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“…This also may be related to differences in radial oxygen loss. Previous studies by Visser et al [33] and Van der Welle et al [13] have demonstrated that the radial oxygen losses of Juncus and Rumex are higher than that of Caltha . As a result of radial oxygen loss, root plaque consisting of oxides and hydroxides is formed on the outside of the roots [14,34–36].…”

Section: Discussionmentioning

confidence: 99%

Predicting metal uptake by wetland plants under aerobic and anaerobic conditions

Welle

Roelofs

Camp

et al. 2007

Enviro Toxic and Chemistry

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Metal pollution can be a serious threat to ecosystems at a global scale. Although the bioavailability of potentially toxic metals is determined by many biotic and abiotic factors, including pH and redox potential, total metal concentrations in the soil are used widely to assess or predict toxicity. In the present study we tested the effect of desiccation of soils differing in acidification potential and total heavy metal contamination on the growth and metal uptake of three typical, common wetland species: Caltha palustris, Juncus effusus, and Rumex hydrolapathum. We found that plant growth in wet soils mainly was determined by nutrient availability, though in dry soils the combined effects of acidification and increased metal availability prevailed. Metal uptake under anaerobic conditions was best predicted by the acidification potential (sediment S/[Ca + Mg] ratio), not by total metal concentrations. We propose that this is related to radial oxygen loss by wetland plant roots, which leads to acidification of the rhizosphere. Under aerobic conditions, plant metal uptake was best predicted by the amount of CaCl2-extractable metals. We conclude that total metal concentrations are not suitable for predicting bioavailability and that the above diagnostic parameters will provide insight into biogeochemical processes involved in toxicity assessment and soil policy.

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Differential responses of the freshwater wetland species Juncus effusus L. and Caltha palustris L. to iron supply in sulfidic environments

Cited by 28 publications

References 45 publications

Sulfide as a soil phytotoxin—a review

Sulfide as a soil phytotoxin—a review

How soil characteristics and water quality influence the biogeochemical response to flooding in riverine wetlands

Predicting metal uptake by wetland plants under aerobic and anaerobic conditions

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