Role of plants, mycorrhizae and phytochelators in heavy metal contaminated land remediation

Khan, Abdul Ghaffar; Kuek, Clem; Chaudhry, Tariq M; Khoo, Cheang; Hayes, W. J.

doi:10.1016/s0045-6535(99)00412-9

Cited by 729 publications

(327 citation statements)

References 91 publications

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“…However, most of these hyperaccumulators belong to the family of Cruciferae, and are non-mycorrhizal, thus in contrast to the ubiquity of AMF in terrestrial ecosystems, there is limited information available regarding the influence of AMF on phytoremediation (Khan et al, 2000). P. vittata is highly mycorrhizal both under field and pot experimental conditions Liu et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Effects of the arbuscular mycorrhizal fungus Glomus mosseae on growth and metal uptake by four plant species in copper mine tailings

Chen

Zhu

Duan

et al. 2007

Environmental Pollution

174

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Section: Discussionmentioning

confidence: 99%

Effects of the arbuscular mycorrhizal fungus Glomus mosseae on growth and metal uptake by four plant species in copper mine tailings

Chen

Zhu

Duan

et al. 2007

Environmental Pollution

174

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“…Seedlings were then transferred to PVC pots containing 1100 ml nutrient solution. Modified Hoagland nutrient solution contained (in mmol L −1 ): KNO 3 4 , 0.09; NaCl, 50. The solution was modified by using FeSO 4 ·7H 2 O instead of NaFe(III) EDTA to avoid interference between another complexing agent and EDDS.…”

Section: Nutrient Solution and Plant Culturementioning

confidence: 99%

“…Contaminated soil can be remediated by physical, chemical or biological techniques [1], but the traditional physical or chemical methods can be very costly and also destructive to the soil [2]. Phytoextraction, one of biological techniques, has been proposed as an environmentally friendly in situ remediation technology for soils contaminated with heavy metals [3][4][5]. However, the efficiency of metal extraction is generally conceived as too slow due to the limitations of hyperaccumulator plants such as low biomass and very slow growth rate.…”

Section: Introductionmentioning

confidence: 99%

Effects of IDSA, EDDS and EDTA on heavy metals accumulation in hydroponically grown maize (Zea mays, L.)

Zhao

Mei-zhu

Jiang

et al. 2010

Journal of Hazardous Materials

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a b s t r a c tHeavy metals contamination of soil is a widespread global problem. Chelant assisted phytoextraction has been proposed to improve the efficiency of phytoextraction which involves three subsequent levels: transfer of metals from the bulk soil to the root surfaces, uptake into the roots and translocation to the shoots. However, most studies focused on the first level. A hydroponic experiment, which addresses the latter two levels, was conducted to study the effects of EDTA, EDDS and IDSA on the uptake and the distribution of Pb, Zn, Cu and Cd in the apoplast and the symplast of roots of maize (Zea mays, L.). The concentrations of the metals (with exception of Zn) in the shoots were increased significantly by addition of all the chelants. EDTA was most effective for Pb uptake and IDSA was interestingly most effective for Cd uptake. Pb in the roots with EDTA was mostly distributed in the apoplast, while Zn, especially with IDSA, was mostly located in the symplast. The results indicated that, the capacity of chelant to enhance the nonselective apoplastic transport of metal may be most important for chelant enhanced phytoextraction.

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“…Mycorrhizae are integral, functioning parts of plant roots and the fungi involved provide a direct link between soil and roots, and can therefore be of great importance in the availability and toxicity of heavy metals to plants (Leyval et al, 1997). Khan et al (2000) demonstrated the role of mycorrhiza in phytoremediation of heavy-metal contaminated soils and enhanced uptake of minerals resulting in greater plant biomass. Arsenic is listed as a hazardous material and is a suspect carcinogen (Karim, 2000;Mandal and Suzuki, 2002).…”

Section: Introductionmentioning

confidence: 99%

Yield and arsenate uptake of arbuscular mycorrhizal tomato colonized by Glomus mosseae BEG167 in As spiked soil under glasshouse conditions

Liu

Zhu

Chen

et al. 2005

Environment International

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A glasshouse pot experiment was conducted to study the effect of arbuscular mycorrhizal (AM) colonization by Glomus mosseae BEG167 on the yield and arsenate uptake of tomato plants in soil experimentally contaminated with five As levels (0, 25, 50, 75 and 150 mg kg À 1 ). Mycorrhizal colonization (50 -70% of root length) was little affected by As application and declined only in soil amended with 150 mg As kg À 1 . Mycorrhizal colonization increased plant biomass at As application rates of 25, 50 and 75 mg kg À 1 . Shoot As concentration increased with increasing As addition up to 50 mg kg À 1 but decreased with mycorrhizal colonization at As addition rates of 75 and 150 mg kg À 1 . Shoot As uptake increased with mycorrhizal colonization at most As addition levels studied, but tended to decrease with addition of 150 mg As kg À 1 . Total P uptake by mycorrhizal plants was elevated at As rates of 25, 50 and 75 mg kg À 1 , and more P was allocated to the roots of mycorrhizal plants. Mycorrhizal plants had higher shoot and root P/As ratios at higher As application rates than did non-mycorrhizal controls. The soil of inoculated treatments had higher available As than uninoculated controls, and higher pH values at As addition levels of 25, 50 and 75 mg kg À 1 . Mycorrhizal colonization may have increased plant resistance to potential As toxicity at the highest level of As contamination studied. Mycorrhizal tomato plants may have potential for phytoextraction of As from moderately contaminated soils or phytostabilization of more highly polluted sites. D

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Role of plants, mycorrhizae and phytochelators in heavy metal contaminated land remediation

Cited by 729 publications

References 91 publications

Effects of the arbuscular mycorrhizal fungus Glomus mosseae on growth and metal uptake by four plant species in copper mine tailings

Effects of the arbuscular mycorrhizal fungus Glomus mosseae on growth and metal uptake by four plant species in copper mine tailings

Effects of IDSA, EDDS and EDTA on heavy metals accumulation in hydroponically grown maize (Zea mays, L.)

Yield and arsenate uptake of arbuscular mycorrhizal tomato colonized by Glomus mosseae BEG167 in As spiked soil under glasshouse conditions

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