Acclimation of <i>Salix</i> to metal stress

Punshon, Tracy; Dickinson, Nicholas

doi:10.1046/j.1469-8137.1997.00802.x

Cited by 106 publications

(73 citation statements)

References 39 publications

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“…The distribution pattern of Cu in plant parts was ranked in the order of roots>stems>leaves. Our results showed relatively high levels of Cu in the above-ground parts, especially in the aerial stems; similar results were reported by Punshon and Dickinson (1997). To the best of our knowledge, however, our results indicate that the Cu accumulation ability of the clones investigated here is far higher than those reported in other studies of the Salicaceae family.…”

Section: Variation In Cu and Zn Accumulationcontrasting

confidence: 56%

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Variation in copper and zinc tolerance and accumulation in 12 willow clones: implications for phytoextraction

Yang

Wang

Zhao

et al. 2014

J. Zhejiang Univ. Sci. B

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Willows (Salix spp.) have shown high potential for the phytoextraction of heavy metals. This study compares variations in copper (Cu) and zinc (Zn) tolerance and accumulation potential among 12 willow clones grown in a nutrient solution treated with 50 μmol/L of Cu or Zn, respectively. The results showed differences in the tolerance and accumulation of Cu and Zn with respect to different species/clones. The biomass variation among clones in response to Cu or Zn exposure ranged from the stimulation of growth to inhibition, and all of the clones tested showed higher tolerance to Cu than to Zn. The clones exhibited less variation in Cu accumulation but larger variation in Zn accumulation. Based on translocation factors, it was found that most of the Cu was retained in the roots and that Zn was more mobile than Cu for all clones. It is concluded that most willow clones are good accumulators of Zn and Cu.

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Section: Variation In Cu and Zn Accumulationcontrasting

confidence: 56%

“…Punshon and Dickinson (1997) reported that Salix fragilis accumulated Cu >300 μg/g DW in leaves, 25-150 μg/g DW in stems, and 300-1200 μg/g DW in roots. However, under some experimental conditions, relatively high Cu concentrations in aerial parts of the Salicaceae family were also recorded.…”

Section: Variation In Cu and Zn Accumulationmentioning

confidence: 99%

Variation in copper and zinc tolerance and accumulation in 12 willow clones: implications for phytoextraction

Yang

Wang

Zhao

et al. 2014

J. Zhejiang Univ. Sci. B

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“…An exposure to dual combinations of metals in the solution culture increased Cd and Zn content in willow roots when supplied with Cu, but not when it was supplied with Zn. Root-bound Cu increased in all combinations (Punshon and Dickinson 1997). However, these element interactions are necessary to compare biomass yields.…”

Section: Resultsmentioning

confidence: 99%

“…Willows acclimation to toxic metals can be achieved by gradually increasing concentrations of heavy metals over 128 days rather than by short-term single pre-treatment. Increased resistance (especially to Cd) is attributable to reduced uptake (Punshon and Dickinson 1997). The interaction between Cd and Zn is either antagonistic or synergistic.…”

mentioning

confidence: 99%

As, Cd, Pb and Zn uptake by Salix spp. clones grown in soils enriched by high loads of these elements

Vysloužilová¹,

Tlustoš²,

Száková³

et al. 2003

Plant Soil Environ.

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As, Cd, Pb and Zn accumulation in the aboveground biomass of seven clones of Salix spp. and changes in element uptake by plants after element addition to soil were studied in a pot experiment. Unpolluted Chernozem (Suchdol) as a control and soils with addition of As (100 mg/kg), Cd (40 mg/kg) and either Pb (2000 mg/kg) (Suchdol-Pb) or Zn (2000 mg/kg) (Suchdol-Zn) were used for the experiment. Significant differences were found in the accumulation of elements between willow clones and also between different element additions to the soil. Although As and Cd uptake slightly increased in Suchdol-Zn soil compared to Suchdol-Pb soil, the element removal from soil was significantly higher in Suchdol-Pb soil due to a significant reduction of aboveground biomass yield in Suchdol-Zn soil caused by Zn phytotoxicity. The yield reduction decreased the uptake of plant-available elements by biomass, thus higher plant-available portions of As and Cd were found in Suchdol-Zn soil. Element removal from soil was more dependent on element contents in willow tissues in Suchdol-Pb soil than in Suchdol-Zn soil, where willow plants exhibited physiological symptoms of phytotoxicity.

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“…Rooted cuttings of Salix sp. can be acclimated to metallic stresses in hydroponic conditions (Punshon and Dickinson, 1997). These studies have contributed to explain how the plants survive and grow in potentially toxic environments (Dickinson et al, 1992;Turner and Dickinson, 1993b).…”

Section: Mechanisms Of Resistance or Tolerance To Metals In Plantsmentioning

confidence: 99%

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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Acclimation of Salix to metal stress

Cited by 106 publications

References 39 publications

Variation in copper and zinc tolerance and accumulation in 12 willow clones: implications for phytoextraction

Variation in copper and zinc tolerance and accumulation in 12 willow clones: implications for phytoextraction

As, Cd, Pb and Zn uptake by Salix spp. clones grown in soils enriched by high loads of these elements

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

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