Direct evidence for the enhanced acquisition of phosphorus in the rhizosphere of aquatic plants: A case study on Vallisneria natans

Xing, Xiumei; Ding, Shiming; Liu, Ling; Chen, Musong; Yan, Wenming; Zhao, Liang; Zhang, Chaosheng

doi:10.1016/j.scitotenv.2017.10.304

Cited by 58 publications

(27 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The immobilisation of P in Fe‐plaques as induced by ROL is in apparent contrast with the need of the plant to take up dissolved P (Christensen & Sand‐Jensen, ). To overcome this possible limitation, recent studies showed that aquatic plants can re‐gain P from plaques by promoting their dissolution (via stimulating acid production or Fe III reduction) for assimilation purposes (Brodersen et al., ; Xing et al., ). Our O 2 and environmental scanning electron microscopy coupled with energy dispersive X‐ray spectrometer data show that conditions favouring precipitation or dissolution of Fe‐P plaques coexist in the rhizosphere and that such heterogeneity persists at both macro‐ and micro‐scales.…”

Section: Discussionmentioning

confidence: 99%

Spatial heterogeneity and short‐term oxygen dynamics in the rhizosphere of Vallisneria spiralis: Implications for nutrient cycling

et al. 2019

View full text Add to dashboard Cite

Aquatic macrophytes modify the sediment biogeochemistry via radial oxygen loss (ROL) from their roots. However, the variation in ROL and its implication for nutrient availability remains poorly explored. Here, we use planar O2 optodes to investigate the spatial heterogeneity of oxic niches within the rhizosphere of Vallisneria spiralis and their alteration following variable light and ambient O2 levels. The effect of ROL on NH4+ and PO43− distribution in the rhizosphere was evaluated by a combination of 15N isotopic techniques, 2D sampling, and electron microscopy. A single specimen of V. spiralis could maintain an oxidised sediment volume of 41–47 cm3 and 10–27 cm3 in the rhizosphere at 100% and 38% dissolved oxygen saturation in the overlying water, respectively. Whatever the environmental conditions, the ROL was, however, very heterogeneous and dependent on root age and architecture of the root system. ROL stimulated the coupling between denitrification and nitrification in the sediment both under dark (+25 μmol N‐N2 m−2 hr−1) and light (+70 μmol N‐N2 m−2 hr−1) conditions. This, in combination with plant uptake, contributed to intense removal of NH4+ from the pore water. Similarly, PO43− was highly depleted in the rhizosphere. The detection of Fe‐P plaques on the roots surface indicated substantial entrapment of P as a consequence of ROL. The extensive spatio‐temporal heterogeneity of oxic and anoxic conditions ensured that aerobic and anaerobic processes co‐occurred in the rhizosphere and this presumably reduced potential nutrient limitation while maximising plant fitness in an otherwise hostile reduced environment.

show abstract

Section: Discussionmentioning

confidence: 99%

Spatial heterogeneity and short‐term oxygen dynamics in the rhizosphere of Vallisneria spiralis: Implications for nutrient cycling

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Potamogeton Crispus with Hydrilla verticillata in the wetland can remove organic N and organic P by 81.28% and 83.54%, respectively [109]. Despite no study stating clearly the purification capacity of Vallisneria natans, it was verified that P absorption by Vallisneria natans can be promoted by organic acids [110]. Some studies have compared the N and P removal performance of different submerged plants in the same conditions.…”

Section: Plants Identification For Mitigating Nitrogen and Phosphorusmentioning

confidence: 99%

The Use of Constructed Wetland for Mitigating Nitrogen and Phosphorus from Agricultural Runoff: A Review

Zheng

Xiao

et al. 2021

Water

View full text Add to dashboard Cite

The loss of nitrogen and phosphate fertilizers in agricultural runoff is a global environmental problem, attracting worldwide attention. In the last decades, the constructed wetland has been increasingly used for mitigating the loss of nitrogen and phosphate from agricultural runoff, while the substrate, plants, and wetland structure design remain far from clearly understood. In this paper, the optimum substrates and plant species were identified by reviewing their treatment capacity from the related studies. Specifically, the top three suitable substrates are gravel, zeolite, and slag. In terms of the plant species, emergent plants are the most widely used in the constructed wetlands. Eleocharis dulcis, Typha orientalis, and Scirpus validus are the top three optimum emergent plant species. Submerged plants (Hydrilla verticillata, Ceratophyllum demersum, and Vallisneria natans), free-floating plants (Eichhornia crassipes and Lemna minor), and floating-leaved plants (Nymphaea tetragona and Trapa bispinosa) are also promoted. Moreover, the site selection methods for constructed wetland were put forward. Because the existing research results have not reached an agreement on the controversial issue, more studies are still needed to draw a clear conclusion of effective structure design of constructed wetlands. This review has provided some recommendations for substrate, plant species, and site selections for the constructed wetlands to reduce nutrients from agricultural runoff.

show abstract

“…Results showed that concentrations of DGT-labile P and SRP increased with rising temperatures, which may be caused by the increase in the microbial reduction of Fe(III) oxyhydroxides and algal degradation. Xing et al (2018) utilized DGT to measure DGT-labile P and HR-Peeper techniques to measure soluble Fe(II), SRP in the rhizosphere. Exploring further plant uptake mechanisms for P in sediments, it was established that root-mediated radial O 2 loss processes caused the formation of Fe plaques on the root surface, with Fe plaques absorbing and accumulating P from Fig.…”

Section: Combined Use Of Dgt With Dialysis Sampler (Peeper)mentioning

confidence: 99%

Diffusive gradients in thin films: devices, materials and applications

Ding

Yang

et al. 2018

Environ Chem Lett

Self Cite

View full text Add to dashboard Cite

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

show abstract

Direct evidence for the enhanced acquisition of phosphorus in the rhizosphere of aquatic plants: A case study on Vallisneria natans

Cited by 58 publications

References 59 publications

Spatial heterogeneity and short‐term oxygen dynamics in the rhizosphere of Vallisneria spiralis: Implications for nutrient cycling

Spatial heterogeneity and short‐term oxygen dynamics in the rhizosphere of Vallisneria spiralis: Implications for nutrient cycling

The Use of Constructed Wetland for Mitigating Nitrogen and Phosphorus from Agricultural Runoff: A Review

Diffusive gradients in thin films: devices, materials and applications

Contact Info

Product

Resources

About