Shanshan Wang

Northeast Institute of Geography and Agroecology, Beijing, Beijing Shi, China

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Publications (6)17.62 Total impact

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    ABSTRACT: Purpose The aim of this article was to explore the hyperaccumulative property from cell membrane permeability, subcellular distribution, and chemical form of Solanum nigrum L. to Cd compared to the nonhyperaccumulator Solanum melongena L. (cultivar name Liaoqie 3) in the same plant family. Materials and methods Soil pot culture experiment was conducted, and the cell membrane permeability, subcellular distribution, and chemical forms of Cd in S. nigrum and S. melongena were determined. Results and discussion The results showed that the tolerance of S. nigrum to Cd was higher and owned all Cd hyperaccumulator characteristics. The relative electric conductivities in root and leaf were higher of S. nigrum than S. melongena, but the malondialdehyde concentrations in former were roughly lower than that in latter. Cd concentration ratio in cell wall, NaCl extractable form, and HAc (acetic acid) extractive form were higher in root, stem, and leaf of S. nigrum. Conclusions Compared to S. melongena, stronger Cd tolerance, higher cell membrane permeability with intact cell membrane, weak Cd forms in subcellular distribution, and relative lower bioactivity speciation may be part reasons of S. nigrum hyperaccumulating Cd.
    Journal of Soils and Sediments 03/2014; 14(3). · 1.97 Impact Factor
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    ABSTRACT: Using low-accumulative plant, especially excluder crop, to safely produce food is one of the very important technologies of phytoremediation, which is practical to safe production and long-term remediation of heavy metal-contaminated soil. A pot experiment using field cadmium (Cd)-contaminated soil (Cd concentration was 0.75 mg kg(-1)) was conducted to compare Cd accumulation differences among 39 normal rice cultivars (Japonica) in Shenyang region of China for food safety and high grain yield aim. The results showed that brown grain Cd concentration in 12 rice cultivars of a total of 39 tested cultivars was lower than 0.2 mg kg(-1) (Agricultural Trade Standard of Nonpollution Food for Rice of China, NY 5115-2008). In these 12 cultivars, Cd enrichment factors (Cd concentration ratio in shoot to that in soil) of nine cultivars were lower than 1. Likewise, Cd translocation factors (Cd concentration ratio in shoot to that in root) of eight cultivars were lower than the 0.28 average. Furthermore, grain yield per pot of seven cultivars were higher than the average 18.4 g pot(-1). Four cultivars, i.e., Shendao 5, Tianfu 1, Fuhe 90, and Yanfeng 47 showed Cd-exclusive characteristic and better foreground application.
    Environmental Science and Pollution Research 09/2012; · 2.76 Impact Factor
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    ABSTRACT: Hoagland solution was used to determine the root morphology properties of Rorippa globosa (Turcz.) Thell. and Rorippa palustris (Leyss.) Bess. Under the conditions of Cd spiked at 2.5 and 5 mg kg(-1), R. globosa showed all hyperaccumulative characteristics and was a Cd-hyperaccumulator. In contrast, R. palustris was a non-hyperaccumulator. The total root lengths, total root surface areas and total root volumes of R. globosa were not significantly decreased (p<0.05) compared to the control when 2.5 and 5 mg kg(-1) of Cd added. However, these 3 indexes of R. palustris were all significantly decreased (p<0.05) when 2.5, 5, 10, 20 and 40 mg kg(-1) Cd added compared its control. The average root diameters of R. palustris and R. globosa were not affected by Cd. These results showed that root morphology might be a factor of plant with strong tolerance to Cd.
    Bioresource Technology 05/2012; 118:455-9. · 5.04 Impact Factor
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    ABSTRACT: Pot culture experiments were conducted to study the remediation potentials of a newly found accumulator Kalimeris integrifolia Turcz. ex DC. under different cadmium (Cd) concentrations with same fertilizer level, as well as the same Cd dose under different fertilizer doses. At medium (100g/kg) chicken manure level, Cd concentrations in roots, stems, leaves, inflorescences, and shoots of K. integrifolia grown in the soils contaminated with 2.5, 5, 10, and 25mg/kg Cd significantly decreased (p < 0.05) in average by 23.8%, 29.9%, 24.0%, 30.1%, and 38.6%, respectively, when compared to those of the pots without addition of chicken manure. In contrast, the medium urea amendment level (1g/kg) showed no effect on the bioaccumulated Cd concentrations of K. integrifolia regardless of the spiked Cd doses. However, Cd extraction capacities (micrograms per pot) of K. integrifolia shoots were significantly increased (p < 0.05) due to the gain in biomass (more than one- to twofolds) by the soil fertilizing effect of urea and chicken manure. Particularly, Cd extraction capacities (micrograms per pot) of K. integrifolia shoots amended by urea were higher than that of chicken manure. Under the condition of 25mg/kg Cd addition, shoot biomasses of K. integrifolia were significantly increased (p < 0.05) with the amendment of chicken manure (50, 100, and 200g/kg) and urea (0.5, 1, and 2g/kg). As a result, the Cd extraction capacities (micrograms per pot) were increased in treatments even though soil extractable Cd concentrations were significantly decreased (p < 0.05) by amendment with chicken manure and maintained by urea addition. For practical application concerns, chicken manure is better used as phytostabilization amendment owing to its reducing role to extractable heavy metal in soil, and urea is better for phytoextraction. KeywordsChicken manure–Urea–Phytoremediation– Kalimeris integrifolia Turcz. ex DC.–Cd (cadmium)
    Water Air and Soil Pollution 01/2011; 218(1):479-486. · 1.75 Impact Factor
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    ABSTRACT: Phytoextraction and phytostabilization are well-established sub-processes of phytoremediation that are being followed for in situ remediation of soils contaminated with toxic metals. Taraxacum mongolicum Hand-Mazz, a newly reported Cd accumulator has shown considerable potential for phytoextracting Cd. This paper investigated the effects of urea and chicken manure on T. mongolicum phytoextracting Cd from soil using pot culture experiments. The results showed that urea application did not affect the Cd concentrations in root, leaf, inflorescence and shoot of T. mongolicum, but chicken manure significantly decreased them (p<0.05) by 23.5%, 31.5%, 24.8% and 30.4% owing to decreased extractable Cd. Urea and chicken manure significantly increased (p<0.05) the phytoextraction capacities (microg pot(-1)) of T. mongolicum to Cd by 3-5-fold due to the increase in shoot biomass (increased 4-7 folds). Further, addition of urea and chicken manure increased organic matter, nitrogen, phosphorus and potassium, the microorganism count, urease and phosphatase activities of soil indicating their eco-friendly function. Urea is ideal for optimizing phytoextraction of T. mongolicum to Cd, while chicken manure is appropriate for phytostabilization.
    Journal of hazardous materials 09/2010; 181(1-3):480-4. · 4.14 Impact Factor
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    Shuhe Wei, Shanshan Wang, Yunmeng Li, Jiangong Zhu
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    ABSTRACT: Purpose Though phytoremediation is an important technology for remedying heavy metal-contaminated soils, hyperaccumulation mechanism, especially in root, is still less known. Materials and methods Pot culture experiment was used to explore the tolerance mechanism of a cadmium (Cd) hyperaccumulator Solanum nigrum L. by determining the main root traits compared to the non-hyperaccumulator Solanum melongena L. (cultivar name Liaoqie 3) in the same plant family. Results and discussion The total root lengths, total root surface areas, and total root volumes of S. nigrum were not significantly decreased (p < 0.05) compared to their controls when Cd spikes were lower than 20 mg kg–1. However, the abovementioned three factors of S. melongena were significantly decreased (p < 0.05) when 20 mg kg–1 of Cd was spiked. By contrast, S. nigrum showed stronger tolerance to Cd. In addition, S. nigrum showed all Cd hyperaccumulator characteristics, i.e., a Cd hyperaccumulator. S. melongena was a non-Cd hyperaccumulator. Conclusions These results indicated that root trait can be a factor of hyperaccumulation because of strong tolerance to Cd.
    Journal of Soils and Sediments 13(6). · 1.97 Impact Factor