Proceedings ArticleDOI
Uptake and Distribution of Cadmium in Different Rice Cultivars
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TLDR
In this paper, the differences between two rice cultivars in Pb concentrations at different stages, the magnitudes of the differences were the highest at maturity, while the differences among different parts of rice plants at maturity were highest in grains.Abstract:
To attempt to understand the variations between rice cultivars in lead (Pb) uptake and distribution, pot soil experiments were conducted with two rice cultivars of different genotypes at different soil Pb levels. The results showed that Pb concentrations and accumulations in the plants of Shanyou 63 were generally higher than those of Wuyunjing 7 under all soil Pb levels, in all plant organs and at all plant growth stages. However, the magnitudes of the differences varied greatly with soil Pb levels, plant organs and plant growth stages. With regard to the differences between two rice cultivars in Pb concentrations at different stages, the magnitudes of the differences were the highest at maturity. Among soil Pb levels, the magnitudes of the differences were the highest under soil Pb treatments of 800 mg kg -1 . Concerning different parts of rice plants at maturity, the magnitudes of the differences were the highest in grains. Compared to the control, Pb distribution ratios of soil Pb treatments increased greatly in roots, but decreased significantly in shoots and grains. At maturity, Pb distribution ratios in roots of Shanyou 63 were obviously lower than those of Wuyunjing 7, but the ratios in shoots of Shanyou 63 were obviously higher than those of Wuyunjing 7. Under soil Pb treatments, the differences between two rice cultivars in Pb distributions ratios in grains were small. The results presented that Shanyou 63 (genotype indica) had higher abilities to absorb Pb from Pb-contaminated soil and transferred a larger proportion of Pb to the shoots than Wuyunjing 7 (genotype japonica). The results also indicate that Pb concentration in rice grain is governed mainly by plant Pb uptake and the transport of Pb from root to shoot, and may be a little by the transport of Pb from shoot to grain.read more
Citations
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Journal ArticleDOI
Cadmium phytoavailability to rice (Oryza sativa L.) grown in representative Chinese soils. A model to improve soil environmental quality guidelines for food safety.
Muhammad Tariq Rafiq,Rukhsanda Aziz,Xiaoe Yang,Wendan Xiao,Muhammad Khalid Rafiq,Basharat Ali,Tingqiang Li +6 more
TL;DR: It is concluded that the selection of proper soil type for food crop production can help to avoid the toxicity of Cd in the authors' daily diet.
Journal ArticleDOI
Risk Assessment of Heavy Metals Contamination in Paddy Soil, Plants, and Grains (Oryza sativa L.) at the East Coast of India
TL;DR: The concentrations of heavy metals were found to be higher in paddy field soils than that of the nearby control soil but below permissible limits, and the higher Health Index values of rice consuming adults and children suggest their adverse health effects in the near future.
Journal ArticleDOI
Uptake of cadmium by rice grown on contaminated soils and its bioavailability/toxicity in human cell lines (Caco-2/HL-7702).
Rukhsanda Aziz,Muhammad Tariq Rafiq,Muhammad Tariq Rafiq,Tingqiang Li,Liu Di,Zhenli He,Peter J. Stoffella,Kewang Sun,Yang Xiao-e +8 more
TL;DR: Cadmium bioaccessibility and bioavailability were found to be significantly higher in yellow soil (YS) rice than calcareous soil (CS) rice, and toxicity assays showed an initial toxicity in YS rice at 6 mg kg(-1) Cd, whereas CS rice did not show any significant change due to low Cd concentrations.
Journal ArticleDOI
A Meta-Analysis on Phenotypic Variation in Cadmium Accumulation of Rice and Wheat: Implications for Food Cadmium Risk Control
TL;DR: A comprehensive low-Cd crop list for remediation practice and a systematic meta-analysis inferring food Cd risks based on plant capacity for Cd accumulation and desired traits for low- Cd crop breeding are provided.
Journal ArticleDOI
The assimilation of spectral sensing and the WOFOST model for the dynamic simulation of cadmium accumulation in rice tissues
TL;DR: It is suggested that the proposed method of integrating the spectral information and the crop growth model could successfully dynamically simulate the Cd accumulation in rice tissues.
References
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Journal ArticleDOI
Response to cadmium in higher plants
TL;DR: It is proposed that, above all in response to acute cadmium stress, various mechanisms might operate both in an additive and in a potentiating way, and a holistic and integrated approach seems to be necessary in the study of the response of higher plants to Cadmium.
Journal ArticleDOI
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TL;DR: Estimated daily intake (EDI) and THQs for Cd and Pb of rice and vegetables exceeded the FAO/WHO permissible limit and bio-accumulation factors of heavy metals were significantly higher for leafy than for non-leafy vegetable.
Journal ArticleDOI
Effect of cadmium on lipid peroxidation, superoxide anion generation and activities of antioxidant enzymes in growing rice seedlings
TL;DR: It is suggested that Cd induces oxidation stress in growing rice plants and that SOD and peroxidase could serve as important components of antioxidant defense mechanisms in rice to combat metal induced oxidative injury.
Journal ArticleDOI
Soil-plant transfer of trace elements—an environmental issue
TL;DR: The transfer of trace elements within the soil-plant chain is a part of the biochemical cycling of chemical elements, it is an element flow from nonliving to the living compartments of the biosphere as mentioned in this paper.
Journal ArticleDOI
Toxic metals in soil-plant systems
TL;DR: In this article, Ross et al. investigated the sources and forms of potentially toxic metals in Soil-Plant Systems (S. Ross), and their distribution in Contaminated Ecosystems.