Phytodesalination of a salt-affected soil with the halophyte Sesuvium portulacastrum L. to arrange in advance the requirements for the successful growth of a glycophytic crop. Bioresour Technol

Laboratory of Plant Adaptation to Abiotic Stresses (LAPSA), Biotechnology Centre of Borj Cedria, P.O. Box 901, 2050 Hammam-Lif, Tunisia.
Bioresource Technology (Impact Factor: 4.49). 09/2010; 101(17):6822-8. DOI: 10.1016/j.biortech.2010.03.097
Source: PubMed

ABSTRACT In the present work, we studied the potential of the obligate halophyte, Sesuvium portulacastrum L., to desalinize an experimentally-salinized soil after the following criteria: (i) decrease in soil salinity and sodicity, (ii) plant biomass capacity to accumulate sodium ions, and (iii) phytodesalinized soil quality (equivalent to growth of a glycophytic test culture of Hordeum vulgare L.). The cultivation of the halophyte on the salinized soil (phytodesalination culture) led to a marked absorption of Na(+) ions by S. portulacastrum roots and their accumulation in the above-ground biomass up to 872 mg plant(-1) and 4.36 g pot(-1) (about 1 tha(-1)). The decrease in salinity and sodicity of the phytodesalinized soil significantly reduced the negative effects on growth of the test culture of H. vulgare. Furthermore, the phytodesalination enabled H. vulgare plants to keep a high water content and to develop a higher biomass with relatively high K and low Na contents.

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Available from: Hans-Werner Koyro, Jan 29, 2014
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    • "In recent years, the use of halophytes as a natural way of reducing water and soil salinity has been proposed (Ke-Fu, 1991; Rabhi et al., 2010; Lokhande et al., 2012). Halophytes are plants with an adapted tolerance to saline conditions that allows them to prosper in salinities that are harmful for non-halophytes (Glenn et al., 2010; Waisel, 1972). "
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    ABSTRACT: The use of halophytes in constructed wetlands (CWs) for phytodesalination has been recently suggested as a strategy for dealing with excess salt, which causes land degradation and has detrimental effects on agricultural productivity. Salinity in drylands is enhanced by strong solar radiation and increased evapotranspiration, and poses additional challenges for decentralized water-treatment systems such as CWs. We tested the potential use of a horizontal subsurface flow CW (HSSF CW) planted with the halophyte Bassia indica to polish treated municipal wastewater quality and reduce salinity, using a pilot system containing eight flow cells. The system was operated under continuous flow of synthetic, secondary level-treated wastewater at a rate of 480–660 ml/h, which resulted in a retention time of approximately 2 days. Water fluxes, and nutrient and salt concentrations in the water were measured and compared to those in flow cells without plants. Plant height was measured periodically and biomass and salt concentrations were recorded at harvest. Removal of biological oxygen demand, and reduction in fecal coliforms and turbidity were evident and similar in planted and non-planted cells. Significant salt uptake was measured in the planted cells, with the amount of Na+ uptake directly related to plant biomass; however, the overall salinity of the treated wastewater increased despite salt uptake by B. indica due to enhanced evapotranspiration. This study reaffirms the notion that halophytes in CWs have the potential capacity for direct uptake of salts. Nevertheless, efficient salt phytoremediation in arid and semi-arid climates will require specific application of plants and relatively short hydraulic residence time to minimize evapotranspiration.
    Ecological Engineering 09/2014; 70:282–286. DOI:10.1016/j.ecoleng.2014.06.012 · 2.58 Impact Factor
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    • "Nasir [95] conducted a field study in Jordan valley to investigate the effects of growing three types of salt accumulator halophyte species, Tamarix aphylla, Atriplex nummularia, and A. halimus, on chemical properties of saline sodic soil and these halophytic species decreased the soil salinity at the end of the experiment. Rabhi et al. [96] observed that Sesuvium portulacastrum, an obligate halophyte, decreased the soil salinity and sodicity. "
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    ABSTRACT: Salinity is one of the rising problems causing tremendous yield losses in many regions of the world especially in arid and semiarid regions. To maximize crop productivity, these areas should be brought under utilization where there are options for removing salinity or using the salt-tolerant crops. Use of salt-tolerant crops does not remove the salt and hence halophytes that have capacity to accumulate and exclude the salt can be an effective way. Methods for salt removal include agronomic practices or phytoremediation. The first is cost- and labor-intensive and needs some developmental strategies for implication; on the contrary, the phytoremediation by halophyte is more suitable as it can be executed very easily without those problems. Several halophyte species including grasses, shrubs, and trees can remove the salt from different kinds of salt-affected problematic soils through salt excluding, excreting, or accumulating by their morphological, anatomical, physiological adaptation in their organelle level and cellular level. Exploiting halophytes for reducing salinity can be good sources for meeting the basic needs of people in salt-affected areas as well. This review focuses on the special adaptive features of halophytic plants under saline condition and the possible ways to utilize these plants to remediate salinity.
    BioMed Research International 07/2014; 2014(8). DOI:10.1155/2014/589341 · 2.71 Impact Factor
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    Journal of Arid Land 01/2012; 22(1). · 0.93 Impact Factor
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