Differences in copper accumulation and copper stress between eight populations of Haumaniastrum katangense

Peng, Hongxia; Wang-Müller, Qiyan; Witt, Timo; Malaisse, François; Küpper, Hendrik

doi:10.1016/j.envexpbot.2011.12.015

Cited by 37 publications

(19 citation statements)

References 31 publications

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“…Similar results were obtained with controlled experiments using Elsholtzia splendens from China, with accumulation of Cu in the roots and low translocation to the shoot, typical for Excluders (Jiang et al 2004;Weng et al 2005). These findings re-affirm that Cu hyperaccumulation is difficult to attain when plants are grown in culture (Morrison et al 1979;Macnair 2003;Faucon et al 2007;Chipeng et al 2009;Peng et al 2012). Nevertheless, the widespread semi-aquatic Crassula helmsii (Crassulaceae) could accumulate more 9000 μg g −1 in its shoot after exposure to 0.6 μg g −1 Cu 2+ in nutrient solution (Küpper et al 2009).…”

Section: Introductionsupporting

confidence: 85%

“…Compared with hyperaccumulators for Ni (from ultramafic soils) and Zn hyperaccumulators (especially Noccaea caerulescens), Cu hyperaccumulators have been relatively little studied. The famous 'copper flower' Haumaniastrum katangense (Lamiaceae) from the DR Congo has, however, been subjected to several experimental studies, which demonstrated that although it is extremely Cu-tolerant it has Excludertype behavior under controlled conditions (Morrison 1980;Chipeng et al 2009;Peng et al 2012) despite Cu hyperaccumulation in field conditions (Paton and Brooks 1996). Similar results were obtained with controlled experiments using Elsholtzia splendens from China, with accumulation of Cu in the roots and low translocation to the shoot, typical for Excluders (Jiang et al 2004;Weng et al 2005).…”

Section: Introductionsupporting

confidence: 52%

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Foliar metal accumulation in plants from copper-rich ultramafic outcrops: case studies from Malaysia and Brazil

Ent

Reeves²

2015

Plant Soil

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Background and aims Ultramafic soils are characterized by relatively high concentrations of nickel (Ni), chromium (Cr), and cobalt (Co). Globally, some ultramafic outcrops are also rich in copper (Cu) and other metals. The occurrence of Cu-accumulating plants on such soils is a very rare phenomenon so far only described from Sri Lanka. The objective of this study was to evaluate the elemental profiles of plants growing in their natural habitat on polymetallic Cu-rich ultramafic soils, with particular focus on unusual uptake of Cu, and possible co-accumulation of other metals. Methods This study focused on Cu-rich ultramafic soils in the Bidu-Bidu Hills (Malaysia) and those in MacedoNiquelândia and Americano do Brasil (Brazil) where chemical analyses of bedrock, soil and plant leaf samples was undertaken. Results and conclusions Although the elemental profile of plants growing on Cu-enriched ultramafic soils reflects that of their environment with elevated concentrations of Co, Cr, Cu and Zn, significant accumulation of these metals is rare. Accumulation of Cu by most plants follows an 'Excluder' response, with limited Cu uptake, even by Cu-tolerant plants on soils with high total and extractable Cu concentrations. Some plants show slightly higher uptake than normal, and might act as 'Indicators', but true hyperaccumulation of this metal is questionable.

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Section: Introductionsupporting

confidence: 85%

Section: Introductionsupporting

confidence: 52%

Foliar metal accumulation in plants from copper-rich ultramafic outcrops: case studies from Malaysia and Brazil

Ent

Reeves²

2015

Plant Soil

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“…While excluders are plants that restrict the transport of metals to the aboveground part and maintain relatively low heavy metal concentrations in shoots, accumulators translocate and accumulate high levels of metals in their above-ground parts. Within the accumulators group, hyperaccumulators can accumulate more than 1000 lg g -1 of copper, cobalt, chromium, nickel and lead or more than 10,000 lg g -1 manganese and zinc in their aboveground dry matter (Adriano et al 2004;Peng et al 2012). At global scale, more than 400 plant species are known to be hyperaccumulators (Faucon et al 2007), and about 30 hyperaccumulators have been identified in South Central Africa (Faucon et al 2007).…”

Section: Biological Methodsmentioning

confidence: 99%

Progresses in restoration of post-mining landscape in Africa

et al. 2018

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Mining alters the natural landscape and discharges large volumes of wastes that pose serious pollution hazards to the environment, to human health and to agriculture. As a result, the recent 2 decades have witnessed a global surge in research on post-mining landscape restoration, yielding a suite of techniques including physical, chemical, biological (also known as phytoremediation) and combinations. Despite the long history of mining in Africa, no systematic review has summarized advances in restoration research and practices after mining disturbance. Thus, the aim of this review was to document the state-of-knowledge and identify gaps in restoration of postmining landscape in Africa through literature review. We found that: (1) there has been substantial progress in identifying species suitable for phytoremediation; (2) few studies evaluated the feasibility of organic amendments to promote autochthonous colonization of mine wastelands or growth of planted species; and (3) restoration of limestone quarries in Kenya, sand mining tailings in South Africa, and gold mine wasteland in Ghana are successful cases of large-scale post-mining restoration practices in Africa. However, the pace of post-mining landscape restoration research and practice in Africa is sluggish compared to other parts of the global south. We recommend: (1) mainstreaming the restoration of mine wastelands in national research strategies and increased development planning to make the mining sector ''Green''; (2) inventory of the number, area, and current status of abandoned mine lands; (3) expanding the pool of candidate species for phytostabilization; (4) further evaluating the phytostabilization potential of organic amendments, e.g., biochar; (5) assessing the impacts of mining on regional biodiversity.

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“…For Cu, these variations can be of genetic origin. Peng et al (2012) demonstrated the foliar Cu variability for six distinct metallicolous populations of Haumaniastrum katangense (Lamiaceae). Six times as much Cu was obtained in nonmetallicolous compared with metallicolous plants of Crepidorhopalon tenuis (Linderniaceae) (c. 115 lg g À1 ) (Faucon et al, 2012a).…”

Section: Genetic Variability Of Cu and Co Accumulationmentioning

confidence: 99%

Copper and cobalt accumulation in plants: a critical assessment of the current state of knowledge

et al. 2016

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This review synthesizes contemporary understanding of copper-cobalt (Cu-Co) tolerance and accumulation in plants. Accumulation of foliar Cu and Co to > 300 μg g is exceptionally rare globally, and known principally from the Copperbelt of Central Africa. Cobalt accumulation is also observed in a limited number of nickel (Ni) hyperaccumulator plants occurring on ultramafic soils around the world. None of the putative Cu or Co hyperaccumulator plants appears to comply with the fundamental principle of hyperaccumulation, as foliar Cu-Co accumulation is strongly dose-dependent. Abnormally high plant tissue Cu concentrations occur only when plants are exposed to high soil Cu with a low root to shoot translocation factor. Most Cu-tolerant plants are Excluders sensu Baker and therefore setting nominal threshold values for Cu hyperaccumulation is not informative. Abnormal accumulation of Co occurs under similar circumstances in the Copperbelt of Central Africa as well as sporadically in Ni hyperaccumulator plants on ultramafic soils; however, Co-tolerant plants behave physiologically as Indicators sensu Baker. Practical application of Cu-Co accumulator plants in phytomining is limited due to their dose-dependent accumulation characteristics, although for Co field trials may be warranted on highly Co-contaminated mineral wastes because of its relatively high metal value.

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Differences in copper accumulation and copper stress between eight populations of Haumaniastrum katangense

Cited by 37 publications

References 31 publications

Foliar metal accumulation in plants from copper-rich ultramafic outcrops: case studies from Malaysia and Brazil

Foliar metal accumulation in plants from copper-rich ultramafic outcrops: case studies from Malaysia and Brazil

Progresses in restoration of post-mining landscape in Africa

Copper and cobalt accumulation in plants: a critical assessment of the current state of knowledge

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