Metabolic adaptations to mercury-induced oxidative stress in roots of Medicago sativa L.

Zhou, Zhao; Huang, Shudong; Guo, Kai; Mehta, Surya Kant; Zhang, Peng Chao; Yang, Zhi Min

doi:10.1016/j.jinorgbio.2006.05.011

Cited by 263 publications

(137 citation statements)

References 73 publications

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“…Poa pratensis planted in Fig. 8 Concentration of Hg ions at the beginning (first water sample from lysimeters) and at the end of the experiment (the last water sample from lysimeters) Cargnelutti et al 2006;Zhou et al 2007Zhou et al , 2008. The reason for the successful growth of plants on such a contaminated soil may be associated with the close to neutral soil pH (7.18 ± 0,36) and high organic matter content (9.14 %) combined with the high organic carbon content (5.03 %).…”

Section: Biomass Of Plants and Mercury Concentrationmentioning

confidence: 99%

Ecological strategy for soil contaminated with mercury

et al. 2016

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Aims The paper presents results from plot experiments aimed at the development of an ecological strategy for soil contaminated with mercury. Meadow grass (Poa pratensis) was tested on mercury contaminated soil in a former chlor-alkali plant (CAP) in southern Poland for its phytoremediation potential. Methods The stabilisation potential of the plants was investigated on plots without additives and after the addition of granular sulphur. Biomass production, uptake and distribution of mercury by plants, as well as leachates and rhizosphere microorganisms were investigated, along with the growth and vitality of plants during one growing season. Results The analysed plants grew easily on mercury contaminated soil, accumulating lower amounts of mercury, especially in the roots, from soil with additive of granular sulphur (0.5 % w/w) and sustained a rich microbial population in the rhizosphere. After amendment application the reduction of Hg evaporation was observed.Conclusions The obtained results demonstrate the potential of using Poa pratensis and sulphur for remediation of mercury contaminated soil and reduction of the Hg evaporation from soil. In the presented study, methods of Hg reduction on Bhot spots^were proposed, with a special focus on environmental protection. This approach provides a simple remediation tool for large areas heavily contaminated with mercury.

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Section: Biomass Of Plants and Mercury Concentrationmentioning

confidence: 99%

Ecological strategy for soil contaminated with mercury

et al. 2016

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“…Os coramentos histoquímicos foram realizados segundo Zhou et al (2007). Para avaliar a viabilidade celular, segmentos radiculares foram lavados com CaCl 2 0,5 mM (pH 4,5), secados suavemente em papel de fi ltro e imersos em azul de Evans 0,025% (m/v) em CaCl 2 0,1 mM (pH 5,6) a 10 o C por 24 h. Para detectar a peroxidação de lipídios, os segmentos radiculares foram imersos em reagente de Shiff à temperatura ambiente por 60 min, enxaguados em bissulfi to de potássio (K 2 S 2 O 5 ) 0,5% (m/v) em HCl 0,05 M e lavados com água destilada.…”

Section: Determinações Realizadasunclassified

Atividade de enzimas antioxidantes e inibição do crescimento radicular de feijão caupi sob diferentes níveis de salinidade

et al. 2012

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ABSTRACT(Activities of antioxidant enzymes and root growth inhibition in cowpea seedlings exposed to diff erent salt levels). Phenol peroxidase (POX) is a dual enzyme that is involved with hydrogen peroxide scavenging and lignin biosynthesis, contributing to growth inhibition by secondary wall thickening. In order to relate growth inhibition to salt-induced oxidative modulation, the activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and POX were evaluated in cowpea roots under salinity. Four-day-old seedlings of the Pitiúba and Pérola cultivars were exposed to 0, 25, 50, 75 and 100 mM NaCl in germination paper under controlled conditions. Aft er two days of treatment, root length was reduced under 100 mM NaCl by 56 and 26% in Pitiúba and Pérola, respectively, which was associated with enhanced electrolyte leakage and cell death in the root apex. NaCl salinity did not trigger lipid peroxidation, indicating that cell death was probably due to membrane damage instead of oxidative stress. Salt stress reduced the activity of SOD, CAT and APX and increased the POX activity, demonstrating that this enzyme plays a role in oxidative protection in cowpea roots exposed to NaCl salinity. In conclusion, salt-induced growth inhibition in cowpea roots could be attributed, at least in part, to a coordinate action involving an increase in POX activity and a drop in CAT and APX activities. Atividade de enzimas antioxidantes e inibição do crescimento radicular de feijão caupi sob diferentes níveis de salinidade

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“…Other adverse effects caused by excessive mercury include membrane structure integrity disruption [54], mineral nutrient uptake reduction [55] and photosynthesis and transpiration reduction [56]. Higher concentrations (> 1-2 mg/l) of mercury decreased the growth of pea, tomato [55] and alfalfa [57]. Mercury also inhibited water uptake through aquaporins in plasma membrane in wheat [58].…”

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confidence: 99%

Sediment Heavy Metal Contaminants in Vasai Creek Of Mumbai: Pollution Impacts

Singare¹,

Trivedi²

2012

CHEMISTRY

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In the present investigation, quantification study of different toxic heavy metals in the sediment samples of Vasai Creek of Mumbai was performed using Atomic Absorption Spectroscopy technique. The study is of importance because such assessment of heavy metals in sediments helps to understand long term pollution load in aquatic environment. Such study will also help to provide a means for evaluating the long term accumulation of heavy metal contaminants. The results of the study indicates that the concentration level of most of the toxic heavy metals like Al, As, Cd, Cr, Hg, Ni, Pb, Sr and Mn for the assessment year 2010-11 were higher than that obtained for the year 2009-10 by the factor of 1.0 to 2.5 µg/g. It is expected that results of present investigation will help in rational planning of pollution control strategies so as to reduce the toxicity impact on marine life of Vasai Creek.

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Metabolic adaptations to mercury-induced oxidative stress in roots of Medicago sativa L.

Cited by 263 publications

References 73 publications

Ecological strategy for soil contaminated with mercury

Ecological strategy for soil contaminated with mercury

Atividade de enzimas antioxidantes e inibição do crescimento radicular de feijão caupi sob diferentes níveis de salinidade

Sediment Heavy Metal Contaminants in Vasai Creek Of Mumbai: Pollution Impacts

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