Cadmium uptake, accumulation, and remobilization in iron plaque and rice tissues at different growth stages

Zhou, Hang; Zhu, Wei; Yang, Wen-Tao; Gu, Jiacun; Gao, Zixiang; Chen, Liwei; Du, Wen-Qi; Zhang, Ping; Peng, Ping; Liao, Bo-Han

doi:10.1016/j.ecoenv.2018.01.031

Cited by 107 publications

(31 citation statements)

References 45 publications

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“…Furthermore, the surfaces of plant (e.g. rice) roots often have a large number of deposition sites for iron plaques (Zhou et al, ). Iron oxides are usually positively charged in soil systems under prevailing conditions.…”

Section: Resultsmentioning

confidence: 99%

Characterizing surface electrochemical properties of simulated bulk soil in situ by streaming potential measurements

Liu

Wang

et al. 2019

European J Soil Science

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To evaluate the feasibility of using streaming potential to characterize the surface electrochemical properties of soil in situ, a quartz sand‐packed column was used to mimic the porous structure and architecture of bulk soil. A laboratory‐made apparatus was developed to measure in situ the streaming potential of quartz grains in the packed column under environmentally relevant physicochemical conditions (e.g. electrolyte pH, Fe oxide coating on sand grains, transport of goethite and amorphous Al hydroxide colloids, and the presence of humic acid). The results showed a significant positive relation between the measured streaming potentials and zeta potentials of the quartz grains examined. With decreasing electrolyte pH, the streaming potential of the quartz grains became less negative because of the greater protonation effect. Similarly, when Fe oxide was adsorbed on to the quartz surfaces, the streaming potential of Fe oxide‐coated quartz grains was less negative than that of uncoated quartz grains as a result of charge neutralization between positively charged Fe oxide and negatively charged sand grains. However, the streaming potential of Fe oxide‐coated quartz grains became more negative when humic acid was added to the electrolyte solution because of increased adsorption of negatively charged humic acid. Interestingly, an obvious change of streaming potential in the processes of colloidal goethite and amorphous Al hydroxide transport in the sand‐packed column grains occurred. Given that the overall positive charge of the colloidal amorphous Al was greater than that of goethite colloids, transport of amorphous Al colloids was found to exert a stronger effect on the variation in streaming potential of quartz sand. Taken altogether, the in situ streaming potential results showed that streaming potential can be used as a powerful index to characterize directly the surface electrochemical properties of quartz grains representing bulk soil. Highlights The variation in surface electrochemical properties of bulk soil needs investigation. We measured the streaming potential produced by simulated bulk soil using a laboratory‐made apparatus. The streaming potential of bulk soil varied with the change in environmentally relevant conditions. Streaming potential is a powerful index characterizing the surface electrochemical properties of bulk soil.

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Section: Resultsmentioning

confidence: 99%

Characterizing surface electrochemical properties of simulated bulk soil in situ by streaming potential measurements

Liu

Wang

et al. 2019

European J Soil Science

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“…Furthermore, dissolved Cd declines and is transformed into Cd-sulfide (CdS) or iron-manganese (oxyhydro) oxides with low solubility 9 , 10 . It has been widely accepted that Cd accumulation in rice increases during the heading and maturing stages, and is accompanied by a higher Eh caused by drainage 11 , 12 .…”

Section: Introductionmentioning

confidence: 99%

Azolla incorporation under flooding reduces grain cadmium accumulation by decreasing soil redox potential

Liu

Guo

et al. 2021

Sci Rep

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Cadmium (Cd) presents severe risks to human health and environments. The present study proposed a green option to reduce bioavailable Cd. Rice pot experiments were conducted under continuous flooding with three treatments (T1: intercropping azolla with rice; T2: incorporating azolla into soil before rice transplantation; CK: no azolla). The results showed that azolla incorporation reduced soluble Cd by 37% compared with the CK treatment, which may be explained by the decreased soil redox potential (Eh) (r = 0.867, P < 0.01). The higher relative abundance of Methylobacter observed in azolla incorporation treatment may account for dissolved organic carbon increase (r = 0.694; P < 0.05), and hence decreased the Cd availability for rice. Azolla incorporation increased the abundance of Nitrospira, indicating the potentially prominent role of nitrogen mineralization in increasing rice yields. Further, lower soluble Cd decreased the expression of OsNramp5, but increased OsHMA3 levels in rice roots, which decreased Cd accumulation in grains. Through these effects, azolla incorporation decreased Cd concentrations in rice grains by 80.3% and increased the production by 13.4%. The negligible amount of Cd absorbed by azolla would not increase the risk of long-term application. Thus, intercropping azolla with early rice and incorporating azolla into soil before late rice transplantation can contribute to safe production at large scales of double rice cultivation.

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“…Application of Zinc-fertilizers leads to increased growth, decreased uptake and accumulation of Cd. It changes the chemical forms of Cd and thus has an adverse effect on the accumulation of Cd in plants [12][13][14][15]. The use of nutrients such as Zinc-fertilizers will promote the yield and quality of crops as well as reduce the absorption of Cd [16,17].…”

Section: Introductionmentioning

confidence: 99%

The effect of Zinc chelate and Potassium sulfate topdressing on alleviating the Cadmium (Cd) and Nitrate (NO3-) toxicity in potato tubers of Ardabil province, Iran

Khamsa¹,

Jafar²,

Ghavidel³

2021

J Agric Sc Food Technol

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Contamination of tuberous vegetables such as potato (Solanum tuberosum L.) with Cadmium (Cd) and Nitrate (NO 3-) due to the imbalanced fertilization may pose health risks to consumers. Potato is one of the dominant agricultural vegetables in Iran which is consumed in different ways. Excessive amounts of Cd and NO 3 in potatoes can lead to organ dysfunction and various diseases. The aim of this study was to investigate the role of Zn-fertilizers on increasing yield and reducing the Cd concentration and also monitoring the NO 3 content in potato tubers of Ardabil province. For this purpose, In the fi rst phase, potato tubers were sampled from 10 most important markets in the form of imbalanced completely randomized design in 2019 and the concentration of Cd when consumed with and without potato peel was assessed, then, in the second phase, the effect of Zn-fertilizers on the yield and concentration of Cd in high-risk areas was investigated in 2020 growing season. The results indicated that the maximum concentration of Cd among the samples was 0.14 mg kg-1 fresh weight and the minimum was 0.02 mg kg-1 fresh weight. According to the results, there was no signifi cant difference between potato samples analyzed with peel and without peel. Therefore, in the second phase, in order to investigate the effect of Zn-fertilizers topdressing on potato tubers yield and Cd concentration, an experiment was conducted in randomized complete block design with 3 treatments and 3 replications in Ardabil University's farm. Experimental treatments were the T1 (control) = Farmer's conventional fertilization with no Zn-fertilizer; T2 = T1 + 2 kg ha-1 Zn-chelate; T3 = T2 + applying 50 kg ha-1 soluble sulfate potassium containing Zn-chelate. The results illustrated that in control plots, while the yield was 23.3 tons per ha and the percentage of dry matter was 19.0 percent, the signifi cant increase (p<0.01) up to 34.0 tons per ha with 24 percent of dry matter was obtained in SSOP+Zn chelate treatment. Also there was a signifi cant difference (p<0.01) between Cd concentration in control treatment and treatments in which Zn-fertilizers have been used. The maximum Cd concentration has observed in control treatment with 0.13 mg kg-1 fresh weight and the minimum has obtained from SSOP+Zn chelate treatment by 0.01 mg kg-1 fresh weight. About Nitrate concentration in potato tubers of the fi eld area, all data were located below the threshold concentration (60 mg kg-1 fresh weight). Therefore, for obtaining healthy agricultural products, using Zn-fertilizers in the agricultural soils with Zn defi ciency should be considered seriously. By practicing balanced fertilization, i.e. applying Zn-fertilizers especially by topdressing method, the quality and quantity of agricultural products as potato will be upgraded and the Cd and NO 3 concentration will be decreased signifi cantly, the country's quality of nutrition will improve and hence, the problem of malnutrition will be solved.

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Cadmium uptake, accumulation, and remobilization in iron plaque and rice tissues at different growth stages

Cited by 107 publications

References 45 publications

Characterizing surface electrochemical properties of simulated bulk soil in situ by streaming potential measurements

Characterizing surface electrochemical properties of simulated bulk soil in situ by streaming potential measurements

Azolla incorporation under flooding reduces grain cadmium accumulation by decreasing soil redox potential

The effect of Zinc chelate and Potassium sulfate topdressing on alleviating the Cadmium (Cd) and Nitrate (NO3-) toxicity in potato tubers of Ardabil province, Iran

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