Silicon-mediated enhancement of cadmium tolerance in maize (Zea mays L.) grown in cadmium contaminated soil

Liang, Yongchao; Wong, Jonathan W C; 龙伟,

doi:10.1016/j.chemosphere.2004.09.034

Cited by 360 publications

(236 citation statements)

References 22 publications

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“…Si is also well known to be effective in alleviating abiotic stresses in higher plants (Hodson and Evans, 1995;Rogalla and Römheld, 2002;Liang et al, 2003Liang et al, , 2005. Our previous study demonstrated that addition of Si to the nutrient solution can decrease As uptake by rice seedlings (Guo et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Is the effect of silicon on rice uptake of arsenate (AsV) related to internal silicon concentrations, iron plaque and phosphate nutrition?

Guo

Zhu

Liu

et al. 2007

Environmental Pollution

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Arsenate uptake by rice seedlings is affected by both Si (internal and external) and iron plaque on root surface. AbstractSolution culture experiments were conducted to investigate the effects of silicon (Si) on arsenate (As V ) uptake by rice. The addition of Si to the pretreatment or uptake solution significantly decreased shoot and root As concentrations (P < 0.001 and P < 0.05). The presence of Si in the pretreatment or uptake solution also significantly decreased shoot P concentrations (P < 0.001). The data demonstrated that both internal and external Si inhibited the uptake of As and P. Results of As uptake kinetics showed that the mechanism of the effect of Si on arsenate uptake is not caused by direct competition for active sites of transporters with As. The effect of Si on As uptake was not entirely mediated through the effect of Si on P uptake. Although the addition of Si to pretreatment solutions still significantly decreased shoot and root As concentrations, the extent of reduction became smaller when rice roots were coated with iron plaque.

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Section: Introductionmentioning

confidence: 99%

Is the effect of silicon on rice uptake of arsenate (AsV) related to internal silicon concentrations, iron plaque and phosphate nutrition?

Guo

Zhu

Liu

et al. 2007

Environmental Pollution

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“…Although Si has not been considered as an essential element for higher plants, it has been proved to be beneficial for the healthy growth and development of many plant species, particularly graminaceous plants such as rice and sugarcane and some cyperaceous plants (Epstein, 1994(Epstein, , 1999Liang, 1999;Ma et al, 2001a;Liang et al, 2005a). The beneficial effects of Si are particularly distinct in plants exposed to abiotic and biotic stresses (Epstein, 1994(Epstein, , 1999Ma, 2004).…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of silicon-mediated alleviation of abiotic stresses in higher plants: A review

Liang

Sun

Zhu

et al. 2007

Environmental Pollution

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Although silicon (Si) is the second most abundant element both on the surface of the Earth's crust and in soils, it has not yet been listed among the essential elements for higher plants. However, the beneficial role of Si in stimulating the growth and development of many plant species has been generally recognized. Silicon is known to effectively mitigate various abiotic stresses such as manganese, aluminum and heavy metal toxicities, and salinity, drought, chilling and freezing stresses. However, mechanisms of Si-mediated alleviation of abiotic stresses remain poorly understood. The key mechanisms of Si-mediated alleviation of abiotic stresses in higher plants include: (1) stimulation of antioxidant systems in plants, (2) complexation or co-precipitation of toxic metal ions with Si, (3) immobilization of toxic metal ions in growth media, (4) uptake processes, and (5) compartmentation of metal ions within plants. Future research needs for Si-mediated alleviation of abiotic stresses are also discussed.

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“…The NPK+ CaSi9000 treatment showed the greatest decrease in the rice Cd concentration (up to ∼73 %). These results were partially because of Cd immobilization caused by silicateinduced pH change in the soils, the increase of pH (Table 3), which altered the Cd distribution in soil fractions, reduced the phytoavailable Cd, and increased the allocation of metals into more stable fractions (Naidu et al 1994;Liang et al 2005;. This resulted in the observed significant decrease of Cd concentration in straw and grain.…”

Section: Effect Of Si On CD Concentration In Rice Grainmentioning

confidence: 98%

Mitigation of cadmium and arsenic in rice grain by applying different silicon fertilizers in contaminated fields

Wang

Wen

Chen

et al. 2015

Environ Sci Pollut Res

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A field experiment was established to support the hypothesis that application of different silicon (Si) fertilizers can simultaneously reduce cadmium (Cd) and arsenic (As) concentration in rice grain. The Bsemi-finished product of Si-potash fertilizer^treatment at the high application of 9000 kg/ha (NP+S-KSi9000) significantly reduced the As concentration in rice grain by up to 20.1 %, compared with the control. Si fertilization reduces the Cd concentration in rice considerably more than the As concentration. All Si fertilizers apart from sodium metasilicate (Na 2 SiO 3 ) exhibited a high ability to reduce Cd concentration in rice grain. The Sicalcium (CaSi) fertilizer is the most effective in the mitigation of Cd concentration in rice grain. The CaSi fertilizer applied at 9000 kg/ha (NPK+CaSi9000) and 900 kg/ha (NPK+CaSi900) reduced the Cd concentration in rice grain about 71.5 and 48.0 %, respectively, while the Si-potash fertilizer at 900 kg/ ha (NP+KSi900), the semi-finished product of Si-potash fertilizer at both 900 kg/ha (NP+S-KSi900) and 9000 kg/ha (NP+S-KSi9000), and the rice straw (NPK+RS) treatments reduced the Cd concentration in rice grain about 42, 26.5, 40.7, and 23.1 %, respectively. The results of this investigation demonstrated the potential effects of Si fertilizers in reducing Cd and As concentrations in rice grain.

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Silicon-mediated enhancement of cadmium tolerance in maize (Zea mays L.) grown in cadmium contaminated soil

Cited by 360 publications

References 22 publications

Is the effect of silicon on rice uptake of arsenate (AsV) related to internal silicon concentrations, iron plaque and phosphate nutrition?

Is the effect of silicon on rice uptake of arsenate (AsV) related to internal silicon concentrations, iron plaque and phosphate nutrition?

Mechanisms of silicon-mediated alleviation of abiotic stresses in higher plants: A review

Mitigation of cadmium and arsenic in rice grain by applying different silicon fertilizers in contaminated fields

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