Comparison of mercury, lead and arsenic with respect to genotoxic effects on plant systems and the development of genetic tolerance

Patra, Malay; Bhowmik, Niladri; Bandopadhyay, Bulbul; Sharma, Archana

doi:10.1016/j.envexpbot.2004.02.009

Cited by 592 publications

(319 citation statements)

References 165 publications

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“…In recent times, the impact of irrigation with high Ascontaminated groundwater on soil and crops has drawn huge attention due to transfer of As to the food chain via the groundwater-soil-plant system (Rahman et al 2008). The bioaccumulation of As in crop plants is potentially hazardous to public health, and this is of great environmental concern because As is known to be a carcinogen and a powerful co-mutagen (Patra et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Arsenic-induced oxidative stress in the common bean legume, Phaseolus vulgaris L. seedlings and its amelioration by exogenous nitric oxide

Talukdar

2012

Physiol Mol Biol Plants

138

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The adverse effects of arsenic (As) toxicity on seedling growth, root and shoot anatomy, chlorophyll and carotenoid contents, root oxidizability (RO), antioxidant enzyme activities, H 2 O 2 content, lipid peroxidation and electrolyte leakage (EL%) in common bean (Phaseolus vulgaris L.) were investigated. The role of exogenous nitric oxide (NO) in amelioration of As-induced inhibitory effect was also evaluated using sodium nitroprusside (100 μM SNP) as NO donor and 2-(4-carboxy-2-phenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (200 μM PTIO) as NO scavenger in different combinations with 50 μM As. Asinduced growth inhibition was associated with marked anomalies in anatomical features, reduction in pigment composition, increased RO and severe perturbations in antioxidant enzyme activities. While activity of superoxide dismutase and catalase increased, levels of ascorbate peroxidase, dehydroascorbate reductase and glutathione reductase decreased significantly and guaiacol peroxidase remained normal. The over-accumulation of H 2 O 2 content along with high level of lipid peroxidation and electrolyte leakage indicates As-induced oxidative damage in P. vulgaris seedlings with more pronounced effect on the roots than the shoots. Exogenous addition of NO significantly reversed the As-induced oxidative stress, maintaining H 2 O 2 in a certain level through balanced alterations of antioxidant enzyme activities. The role of NO in the process of amelioration has ultimately been manifested by significant reduction of membrane damage and improvement of growth performance in plants grown on As + SNP media. Onset of oxidative stress was more severe after addition of PTIO, which confirms the protective role of NO against Asinduced oxidative damage in P. vulgaris seedlings.

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Section: Introductionmentioning

confidence: 99%

Arsenic-induced oxidative stress in the common bean legume, Phaseolus vulgaris L. seedlings and its amelioration by exogenous nitric oxide

Talukdar

2012

Physiol Mol Biol Plants

138

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“…The increase depends on the increment of exogenous Pb levels (Patra et al, 2004). Most of the Pb absorbed by plants accumulates in roots, and only a small fraction is translocated to the aerial part (Patra et al, 2004). The retention of Pb in the roots is due to binding to ion exchange sites and extracellular precipitation, mainly in the form of Pb carbonates, with both these mechanisms occurring in the cell wall (Jarvis and Leung, 2002).…”

Section: Effect Of Metals On Nutrition and Metabolism Of Plantsmentioning

confidence: 99%

“…Uptake of Pb in plants is regulated by pH, particle size and cation exchange capacity of the soils as well as by exsudation and other physico-chemical parameters (Sharma and Dubey, 2005). The increase depends on the increment of exogenous Pb levels (Patra et al, 2004). Most of the Pb absorbed by plants accumulates in roots, and only a small fraction is translocated to the aerial part (Patra et al, 2004).…”

Section: Effect Of Metals On Nutrition and Metabolism Of Plantsmentioning

confidence: 99%

“…Toxic metallic ions penetrate cells using the same absorption processes of essential micronutrient ions. The quantity absorbed by the plant depends on the concentration and speciation of the metal in the soil solution, together with its successive movement from the soil to the root surface and from the root to the aerial part (Patra et al, 2004).…”

Section: Natural and Anthropogenic Factors Affecting The Bioavail-abimentioning

confidence: 99%

“…According to Patra et al (2004), plants that grow in environments contaminated with traces of metals show strategies of escape or tolerance to metal toxicity that have been selected during evolution. Several plant species have developed tolerance to metals in a relatively short period of about thirty years (Hall, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Tolerance and prospection of phytoremediator woody species of Cd, Pb, Cu and Cr

Almeida

Valle

Mielke

et al. 2007

Braz. J. Plant Physiol.

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High concentrations of Cd, Pb, Cu and Cr can cause harmful effects to the environment. These highly toxic pollutants constitute a risk for aquatic and terrestrial life. They are associated with diverse bioavailable geochemical fractions, like the water-soluble fraction and the exchangeable fraction, and non-available fractions like those associated with the crystalline net of clays and silica minerals. Depending upon their chemical and physical properties we can distinguish different mechanisms of metal toxicity in plants, such as production of reactive oxygen species from auto-oxidation, blocking and/or displacement of essential functional groups or metallic ions of biomolecules, changes in the permeability of cellular membranes, reactions of sulphydryl groups with cations, affinity for reactions with phosphate groups and active groups of ADP or ATP, substitution of essential ions, induction of chromosomal anomalies and decrease of the cellular division rate. However, some plant species have developed tolerance or resistance to these metals naturally. Such evolution of ecotypes is a classic example of local adaptation and microevolution, restricted to species with appropriate genetic variability. Phytoremediator woody species, with (i) high biomass production, (ii) a deep root system, (iii) high growth rate, (iv) high capacity to grow in impoverished soils, and (v) high capacity to allocate metals in the trunk, can be an alternative for the recovery of degraded soils due to excess of metallic elements. Phytoremediation using woody species presents advantageous characteristics as an economic and ecologically viable system, making it an appropriate, practical and successful technology. Key-words: decontamination, heavy metals, hyperaccumulation, phytodegradation, phytostabilization, phytotoxicity Tolerância e prospecção de espécies lenhosas fitorremediadoras de Cd, Pb, Cu e Cr: Altas concentrações de Cd, Pb, Cu e Cr podem provocar efeitos danosos ao ambiente. Esses poluentes altamente tóxicos constituem um risco para a vida aquática e terrestre. Encontram-se associados às diversas frações geoquímicas biodisponíveis, a exemplo da fração solúvel em água e da fração trocável, e as não disponíveis como a fração associada à rede cristalina de argilas e de minerais silicatados. Conforme as suas propriedades químicas e físicas podem-se distinguir mecanismos diferentes de toxicidade de metais em plantas, tais como produção de espécies reativas de oxigênio pela auto-oxidação, bloqueio e, ou, deslocamento de grupos funcionais ou de íons metálicos essenciais de biomoléculas, mudanças na permeabilidade de membranas celulares, reações de grupos sulfidrílicos com cátions, afinidade para reações com grupos fosfatos e grupos ativos de ADP ou ATP, substituição de íons essenciais, indução de anomalias cromossomais e decréscimo da taxa de divisão celular. Várias espécies vegetais desenvolveram, naturalmente, tolerância ou resistência a esses metais. Essa evolução de ecótipos é exemplo clássico de adaptação local e de microevolução,...

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2019

Economically and Environmentally Sustainable Enhanced Oil Recovery

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Comparison of mercury, lead and arsenic with respect to genotoxic effects on plant systems and the development of genetic tolerance

Cited by 592 publications

References 165 publications

Arsenic-induced oxidative stress in the common bean legume, Phaseolus vulgaris L. seedlings and its amelioration by exogenous nitric oxide

Arsenic-induced oxidative stress in the common bean legume, Phaseolus vulgaris L. seedlings and its amelioration by exogenous nitric oxide

Tolerance and prospection of phytoremediator woody species of Cd, Pb, Cu and Cr

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