Effects of EDTA application and arbuscular mycorrhizal colonization on growth and zinc uptake by maize (Zea mays L.) in soil experimentally contaminated with zinc

Chen, Baodong; Shen, Hong; Li, Xin; Feng, Gu; Christie, Peter

doi:10.1023/b:plso.0000035538.09222.ff

Cited by 93 publications

(43 citation statements)

References 43 publications

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“…Joner and Leyval [56] observed that the AM fungi hyphal growth was reduced at extractable Cd soil concentration higher than 20 mg Cd kg −1 of soil, while Repetto et al [57] and Rivera-Becerril et al [58] observed a decrease in mycorrhizal parameters (F%, M%, A%) even at the concentration of 2-3 mg of bioavailable Cd kg −1 of substrate. Chen et al [59], in turn, recorded a toxic effect of Zn on Z. mays mycorrhizal root colonization.…”

Section: Discussionmentioning

confidence: 99%

Arbuscular mycorrhiza of Deschampsia cespitosa (Poaceae) at different soil depths in highly metal-contaminated site in southern Poland

et al. 2013

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This study presents root colonization of Deschampsia cespitosa growing in the immediate vicinity of a former Pb/Zn smelter by arbuscular mycorhizal fungi (AMF) and dark septated endophytes (DSE) at different soil depths. AMF spores and species distribution in soil profile were also assessed. Arbuscular mycorrhiza (AM) and DSE were found in D. cespitosa roots at all investigated soil levels. However, mycorrhizal colonization in topsoil was extremely low with sporadically occurring arbuscules. AM parameters: frequency of mycorrhization of root fragments (F%), intensity of root cortex colonization (M%), intensity of colonization within individual mycorrhizal roots (m%), and arbuscule abundance in the root system (A%) were markedly higher at 20–40, 40–60 cm soil levels and differed in a statistically significant manner from AM parameters from 0–10 and 10–20 cm layers. Mycorrhizal colonization was negatively correlated with bioavailable Cd, Pb and Zn concentrations. The number of AMF spores in topsoil was very low and increased with soil depth (20–40 and 40–60 cm). At the study area spores of three morphologically distinctive AMF species were found: Archaeospora trappei, Funneliformis mosseae and Scutellospora dipurpurescens. The fourth species Glomus tenue colonized roots of D. cespitosa and was observed in the root cortex at 20–40 and 40–60 soil depth, however, its spores were not found at the site.

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Section: Discussionmentioning

confidence: 99%

Arbuscular mycorrhiza of Deschampsia cespitosa (Poaceae) at different soil depths in highly metal-contaminated site in southern Poland

et al. 2013

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“…Inoculation of Cd-resistant bacterial strains to Brassica napus to a metal contaminated soil significantly increased the plant uptake of Cd when compared with the non-inoculated controls, as a result of pH reduction (Sheng and Xia, 2006). However, on the contrary, Glomus caledonium (Chen et al, 2004) and Glomus mosseae (Citterio et al, 2005) were reported to have no effect on the speciation of Cd and Zn, and Cr and Ni, thus no effect of bioaugmentation by these arbuscular mycorrhizal (AM) fungi on the rate of phytoextraction has been observed, which could be attributed to whether strong symbiotic relationships between AM fungi and host plants. (2012) who also reported bacteria-assisted increase in heavy metal mobilization.…”

Section: Mobility Of the Metals In Soilmentioning

confidence: 95%

Phytoextraction of Heavy Metals Induced by Bioaugmentation of a Phosphate Solubilizing Bacterium

Arunakumara

Walpola

Song

et al. 2014

Korean Journal of Environmental Agriculture

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BACKGROUND:Excessive metals in the soil have become one of the most significant environmental problems. Phytoremediation has received considerable attention as a method for restoring the contaminated soils. The microbes having remarkable metal tolerance and plant growth-promoting abilities could also play a significant role in remediation of metal-contaminated soils, because bioaugmentation with such microbes could promote phytoextraction of metals. Therefore, the present study was focused on evaluating the phytoextraction of heavy metals (Co, Pb and Zn) in Helianthus annuus (sunflower) induced by bioaugmentation of a phosphate solubilizing bacterium. METHODS AND RESULTS: A phosphate solubilizing bacterium was isolated from metal-contaminated soils based on the greater halo size (>3 mm) with solid NBRIP agar medium containing 10 g glucose, 5 g Ca 3 (PO 4 ) 2 , 5 g MgCl 2 ⋅6H 2 O, 0.25 g MgSO 4 .7H 2 O, 0.2 g KCl, 0.1 g (NH 4 ) 2 SO 4 in 1 L distilled water. Isolated bacterial strain

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“…Metal retention by roots is often cited as a beneficial strategy (Wagner, 1993), although in few cases has the site of increased metal storage in roots been identified. Similarly, some mycorrhizal fungi have been shown to reduce accumulation of certain heavy metals in shoots and it is presumed that this is due to increased retention within the root/mycorrhizal structures Chen et al, 2004;Zhang et al, 2005). There are a number of possible explanations for the observed reductions in heavy metal concentrations in shoots of mycorrhizal plants.…”

Section: Introductionmentioning

confidence: 99%

Arbuscular mycorrhizal colonisation increases copper binding capacity of root cell walls of Oryza sativa L. and reduces copper uptake

Zhang

Lin

Gao

et al. 2009

Soil Biology and Biochemistry

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a b s t r a c tThere is evidence that colonisation by mycorrhizal fungi can protect host plants from toxic concentrations of heavy metals. The mechanism by which protection is provided by the fungus for any particular metal is poorly understood. Rice (Oryza sativa L.) plants were inoculated with Glomus mosseae and grown for 4 weeks to ensure strong colonisation. The plants were then exposed to low to toxic concentrations of copper (Cu) and the uptake and distribution were examined. The effect of mycorrhizal colonisation on the cell wall composition and Cu binding capacity of roots was also investigated. Mycorrhizal plants showed moderate reductions in Cu concentrations in roots but large reductions in shoots. In roots, mycorrhizal plants accumulated more Cu in cell walls but much less in the symplasm compared to nonmycorrhizal plants. The differences in cell wall binding of Cu could be partly explained by changes in the composition of the cell wall. The mechanistic basis for the reduced Cu accumulation and the potential beneficial consequences of mycorrhizal associations on plant growth in Cu toxic soil are discussed.

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Effects of EDTA application and arbuscular mycorrhizal colonization on growth and zinc uptake by maize (Zea mays L.) in soil experimentally contaminated with zinc

Cited by 93 publications

References 43 publications

Arbuscular mycorrhiza of Deschampsia cespitosa (Poaceae) at different soil depths in highly metal-contaminated site in southern Poland

Arbuscular mycorrhiza of Deschampsia cespitosa (Poaceae) at different soil depths in highly metal-contaminated site in southern Poland

Phytoextraction of Heavy Metals Induced by Bioaugmentation of a Phosphate Solubilizing Bacterium

Arbuscular mycorrhizal colonisation increases copper binding capacity of root cell walls of Oryza sativa L. and reduces copper uptake

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