Use of low-calcium cultivars to reduce cadmium uptake and accumulation in edible amaranth (Amaranthus mangostanus L.)

He, Bin; Yu, Dan-Ping; Shi, Jianfeng; Xia, Yan; Li, Qu-Sheng; Wang, Lili; Ling, Ling; Zeng, Eddy Y.

doi:10.1016/j.chemosphere.2016.12.085

Cited by 50 publications

(22 citation statements)

References 45 publications

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“…Therefore, LMWOAs play a key role in the metal mobilization in the rhizosphere soil. The literature confirmed that glucose metabolism produces more LMWOAs [ 30 ]. We speculate that exogenous glycinebetaine treatment promotes the photosynthesis of amaranth and increases the soluble sugar content of root, which further increases the total contents of DOC, LMWOAs, and soluble sugar in the rhizosphere soil.…”

Section: Resultsmentioning

confidence: 91%

“…Figure 4 a–c show that after exogenous glycinebetaine treatment, the Ca, Mg and Fe contents in the leaves were significantly higher ( p < 0.05) than those in the control, whereas Cd leaf , which denoted the Cd concentration in the leaves, was positively correlated with the Ca, Mg and Fe contents ( p < 0.01) ( Figure 4 d). Cd is a non-essential element for plant growth that typically enters plants through Ca and Mg channels on the plasma membrane or zinc and ferric transporters [ 30 , 31 , 36 , 37 ]. For example, Cd can enter rice through Fe transporters [ 38 ] and the non-hyperaccumulating ecotype of Sedum alfredii through Ca channels [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

“…At the same time as the plants were harvested, the rhizosphere soil in the nylon mesh was placed in sealed bags. The rhizosphere soil solution was collected using the high-speed centrifugation method [ 30 ]. The soil solution was filtered twice with a 0.45-μm filter, and then stored in a −80 °C freezer for determination of the contents of Cd, soluble sugar, DOC, and LMWOAs [ 31 ].…”

Section: Methodsmentioning

confidence: 99%

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Exogenous Glycinebetaine Promotes Soil Cadmium Uptake by Edible Amaranth Grown during Subtropical Hot Season

Yao¹,

Lei

Yang

et al. 2018

IJERPH

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Exogenous glycinebetaine treatment is an effective measure for preventing crops from being exposed to drought and high temperature; however, the effects of this approach on the soil Cd uptake and accumulation by crops remain unclear. Pot experiments were conducted in this study to analyze the effect of glycinebetaine on the soil Cd uptake and accumulation by edible amaranth cultivated in Cd-contaminated soil. Results revealed that after exogenous glycinebetaine treatment on amaranth leaves during the vigorous growth period, the plant biomass, the Cd concentrations in the roots and shoots, and the Cd translocation factor (TF) were significantly higher than those of the control group. The highest Cd concentrations in the roots and shoots and the TF were higher by 91%, 96% and 23.8%, respectively, than the corresponding values in the control group. In addition, exogenous glycinebetaine treatment significantly increased leaf chlorophyll content and promoted the photosynthesis of edible amaranth. Consequently, the contents of soluble sugar, dissolved organic carbon, and low-molecular-weight organic acids significantly increased in the rhizosphere, resulting in Cd mobilization. Significant positive correlations were observed among the contents of leaf chlorophyll, Mg, Fe, pectin and Ca. Given that Cd shares absorption and translocation channels with these elements, we speculated that the increased leaf chlorophyll and pectin contents promoted the absorption and accumulation of Mg, Fe and Ca, which further promoted the absorption and translocation of Cd. These results indicated that exogenous glycinebetaine treatment during hot season would aggravate the health risks of crops grown in Cd-contaminated soils.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Exogenous Glycinebetaine Promotes Soil Cadmium Uptake by Edible Amaranth Grown during Subtropical Hot Season

Yao¹,

Lei

Yang

et al. 2018

IJERPH

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“…In-situ remediation of Cu-contaminated soils is regarded as an effective, practicable, and environmentally friendly measure [ 8 ]. Biochar (BC) is the solid, carbon (C)-rich and silicon (Si)-rich product of heating biomass in a low oxygen environment (pyrolysis) [ 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Aging Effects of Biochar on Soil C and Si Dissolution and the Interactive Impact on Copper Immobilization

Jiang

Duan

et al. 2020

Molecules

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Aging tests were used to investigate the long-term effects of BC on the immobilization of Cu, and the soil silicon dissolution of three types soils (black soil, (BS), vegetable garden soil (VS) and red soil (RS)). Litchi branch biochars (BC) at 10% (w/w) were incubated with three Cu (400 mg/kg) contaminated soils. The effect on soil properties of pH, soil organic carbon (SOC), dissolved organic carbon (DOC) and available silicon content were investigated, along with the speciation distribution of Cu. The results indicated that SOC, DOC, and available silicon content (except, BC300) increased with the application of BCs. On the other hand, the DTPA (diethylenetriaminepentaacetic acid) extractable Cu content in BS, VS and RS soils were reduced by 4–12%, 18–25%, and 12–19%, respectively. The Cu availability in all soils first increased, and then decreased during the aging process. The sum of the other four fractions, including the carbonate fraction and the inert component increased by 4–4.5% (BS), 1.4–2.1% (VS), and 0.5–1% (RS) respectively, over the long-term process. Moreover, during the whole aging process, the soil properties (such as pH, SOC, DOC and available silicon content) were almost stable. This study demonstrates that BCs, especially those produced at a higher temperature, are superior to those been produced at 300 °C in immobilizing Cu and releasing available silicon in soils. However, the remediation efficiencies were restricted by the soil type contamination status and remediation time.

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“…Alternatively, careful selection of low Cd-accumulating vegetable cultivars or pollution-safe cultivars was another effective strategy to reduce Cd uptake by vegetables and subsequent human exposure. 14,15 Foliar spraying of liquid amendments and culturing low Cdaccumulating vegetable cultivars can reduce Cd accumulation in vegetables, but their targets are plants not soils, especially Cd pollutants at a high-risk level in the soils. In situ Cd immobilization in soils could minimize health risks by reducing the uptake of heavy metals by vegetables.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Cd accumulation in pak choi (Brassica chinensis L.) in consecutive growing seasons using mercapto-grafted palygorskite

Liang

et al. 2018

RSC Adv.

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Use of low-calcium cultivars to reduce cadmium uptake and accumulation in edible amaranth (Amaranthus mangostanus L.)

Cited by 50 publications

References 45 publications

Exogenous Glycinebetaine Promotes Soil Cadmium Uptake by Edible Amaranth Grown during Subtropical Hot Season

Exogenous Glycinebetaine Promotes Soil Cadmium Uptake by Edible Amaranth Grown during Subtropical Hot Season

Investigating the Aging Effects of Biochar on Soil C and Si Dissolution and the Interactive Impact on Copper Immobilization

Reduction of Cd accumulation in pak choi (Brassica chinensis L.) in consecutive growing seasons using mercapto-grafted palygorskite

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