Heavy Metal Resistance and Accumulation Characteristics in Willows

Punshon, Tracy; Dickinson, Nicholas

doi:10.1080/15226519908500025

Cited by 51 publications

(45 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The potential in phytoremediation of metal contaminated soils expressed by forest trees has been assessed for several species in re cent years (Arduini et al 1996, Pisano & Rockwood 1997, Kozlov et al 2000, Mau rice & Lagerkvist 2000, Prasad & Freitas 2000, Kopponen et al 2001, Rosselli et al 2003, French et al 2006, Meers et al 2007, Brunner et al 2008, Domínguez et al 2008. Resistance to metals often appears to be clone-or hybrid-specific rather than spe cies-specific (Punshon & Dickinson 1999).…”

Section: Woody Plants and Phytoremediationmentioning

confidence: 99%

Heavy metals and woody plants - biotechnologies for phytoremediation

Capuana¹

2011

iForest

View full text Add to dashboard Cite

Soil contamination by heavy metals is among the most serious danger for the environment, and new methods for its containment and removal are claimed, in particular for agricultural soils. Phytoremediation is an emerging, potentially effective technology applicable to restoration of contaminated soils and waters. Besides hyperaccumulator herbaceous plants, several woody species are now considered of interest to this aim. Many woody plants are fast growing, have deep roots, produce abundant biomass, are easy to harvest, and several species revealed some capacity to tolerate and accumulate heavy metals. Biotechnologies are now available for investigating this potential and enlarge the possibilities of exploitation of trees for remediation. The use of in vitro cultures, the role of bacteria and mychorrhizas, the powerful tool of genetic engineering, are some of the aspects focused in this paper that open prospects of global relevance for a better understanding of the processes related to the uptake of heavy metals by woody plants. In recent years significant progress has been made in identifying native plants and developing genetically modified tree plants for the remediation of heavy-metal polluted environment. Despite the intensive research developed in the last years, few field trials demonstrated the feasibility of the approach described, therefore much efforts should be addressed to this goal

show abstract

Section: Woody Plants and Phytoremediationmentioning

confidence: 99%

Heavy metals and woody plants - biotechnologies for phytoremediation

Capuana¹

2011

iForest

View full text Add to dashboard Cite

show abstract

“…Willows are recognized for their phytoremediation potential and for phytoextraction of soils contaminated by heavy metals [11,22,23,25,26,31,32,[54][55][56]. Both species and clonal differences have been observed for heavy metal concentrations, but these higher concentrations have sometimes had little apparent effect on growth and biomass accumulation in willows [30,[54][55][56][57].…”

Section: Discussionmentioning

confidence: 99%

“…Both species and clonal differences have been observed for heavy metal concentrations, but these higher concentrations have sometimes had little apparent effect on growth and biomass accumulation in willows [30,[54][55][56][57]. A limited number of European willows have been assessed for genetic variation both among and within species in their capacity for absorption of various soil contaminants under field conditions [19,21,23,25,27,[58][59][60]. However, much less is known about such responses for North American willows [6,8,9,13,14], or their potential use in phytoremediation.…”

Section: Discussionmentioning

confidence: 99%

“…Highly disturbed mine sites with very low pH and high levels of metals and electrical conductivity (EC) can be challenging for reclamation and revegetation [18]. Although reclamation and phytoremediation of heavy-metal-contaminated sites using willows have been investigated in Europe, these studies have been restricted to a limited number of species and a limited number of genotypes (or clones) within species [11,12,[19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Of special concern for bioenergy production in the context of land reclamation is the identification of well-adapted, native plant species that can tolerate highly acidic soil conditions that may contain potentially toxic levels of metals and high EC [8,13,14,21,[33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Phytoremediation Efficacy of Salix discolor and S. eriocephela on Adjacent Acidic Clay and Shale Overburden on a Former Mine Site: Growth, Soil, and Foliage Traits

Mosseler¹,

Major²

2017

Forests

View full text Add to dashboard Cite

Plants regularly experience suboptimal environments, but this can be particularly acute on highly-disturbed mine sites. Two North American willows-Salix discolor Muhl. (DIS) and S. eriocephala Michx. (ERI)-were established in common-garden field tests on two adjacent coal mine spoil sites: one with high clay content, the other with shale overburden. The high clay content site had 44% less productivity, a pH of 3.6, 42% clay content, high water holding capacity at saturation (64%), and high soil electrical conductivity (EC) of 3.9 mS cm −1 . The adjacent shale overburden site had a pH of 6.8, and after removing 56.5% stone content, a high sand content (67.2%), low water holding capacity at saturation (23%), and an EC of 0.9 mS cm −1 . The acidic clay soil had significantly greater Na (20×), Ca (2×), Mg (4.4×), S (10×), C (12×) and N (2×) than the shale overburden. Foliar concentrations from the acidic clay site had significantly greater Mg (1.5×), Mn (3.3×), Fe (5.6×), Al (4.6×), and S (2×) than the shale overburden, indicating that these elements are more soluble under acidic conditions. There was no overall species difference in growth; however, survival was greater for ERI than DIS on both sites, thus overall biomass yield was greater for ERI than DIS. Foliar concentrations of ERI were significantly greater than those of DIS for N (1.3×), Ca (1.5×), Mg (1.2×), Fe (2×), Al (1.5×), and S (1.5×). There were no significant negative relationships between metal concentrations and growth or biomass yield. Both willows showed large variation among genotypes within each species in foliar concentrations, and some clones of DIS and ERI had up to 16× the Fe and Al uptake on the acidic site versus the adjacent overburden. Genetic selection among species and genotypes may be useful for reclamation activities aimed at reducing specific metal concentrations on abandoned mine sites. Results show that, despite having a greater water holding capacity, the greater acidity of the clay site resulted in greater metal mobility-in particular Na-and thus a greater EC. It appears that the decline in productivity was not due to toxicity effects from the increased mobility of metals, but rather to low pH and moisture stress from very high soil Na/EC.

show abstract

“…The use of willow (Salix) for soil stabilization in former mining sites due to its ability to tolerate high soil metal concentrations has been recently proposed (Dickinson, 2000;Hammer et al, 2003). Actually, a large variation in the tolerance to excess heavy metals exists within Salix clones (Greger and Landberg, 1999;Punshon and Dickinson, 1999;Rulford et al, 2002;Vyslouzilova et al 2003) indicating that the potential of Salix to tolerate elevated metal levels is still far from being fully unravelled.…”

Section: Introductionmentioning

confidence: 99%