<i>Thlaspi caerulescens</i>, an attractive model species to study heavy metal hyperaccumulation in plants

Assunção, Ana G. L.; Schat, Henk; Aarts, Mark G. M.

doi:10.1046/j.1469-8137.2003.00820.x

Cited by 325 publications

(179 citation statements)

References 81 publications

(164 reference statements)

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“…Similar Wndings were described in two other studies (Assunção et al 2003b;Zha et al 2004). The Zn and Cd accumulation in shoot and in root were signiWcantly correlated, which was also found for the shoot concentrations in the study of Zha et al (2004).…”

Section: Segregation For Zn and CD Hyperaccumulation Traitssupporting

confidence: 89%

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QTL analysis of cadmium and zinc accumulation in the heavy metal hyperaccumulator Thlaspi caerulescens

et al. 2006

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Thlaspi caerulescens (Tc; 2n = 14) is a natural Zn, Cd and Ni hyperaccumulator species belonging to the Brassicaceae family. It shares 88% DNA identity in the coding regions with Arabidopsis thaliana (At) (Rigola et al. 2006). Although the physiology of heavy metal (hyper)accumulation has been intensively studied, the molecular genetics are still largely unexplored. We address this topic by constructing a genetic map based on AFLP ® markers and expressed sequence tags (ESTs). To establish a genetic map, an F 2 population of 129 individuals was generated from a cross between a plant from a Pb/Cd/Zn-contaminated site near La Calamine, Belgium, and a plant from a comparable site near Ganges (GA), France. These two accessions show diVerent degrees of Zn and, particularly, Cd accumulation. We analyzed 181 AFLP markers (of which 4 co-dominant) and 13 co-dominant EST sequences-based markers and mapped them to seven linkage groups (LGs), presumably corresponding to the seven chromosomes of T. caerulescens.

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Section: Segregation For Zn and CD Hyperaccumulation Traitssupporting

confidence: 89%

“…For many years, it has been the subject of intensive research to better understand the mechanism of heavy metal hyperaccumulation and tolerance. T. caerulescens represents a potential source of genes for engineering heavy metal phytoremediation in plants (Assunção et al 2003b;Cobbett 2003).…”

Section: Introductionmentioning

confidence: 99%

QTL analysis of cadmium and zinc accumulation in the heavy metal hyperaccumulator Thlaspi caerulescens

et al. 2006

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“…These results agree with the metal accumulation of the two Salix clones (Vandescasteele et al 2005), both clones exhibited high accumulation levels of Cd in the shoots, where as Pb was found mainly in the roots. Insufficient selectivity of the ion transport channels results in possible translocation of Cd and Pb to the root cells (Assuncao et al 2003). In our experiment, high concentration of heavy metals in the roots and higher amounts of heavy metals in aboveground parts (especially more mobile Cd) were also observed.…”

Section: Discussionsupporting

confidence: 63%

Heavy metals uptake by the hybrid aspen and rowan-tree clones

Malá¹,

Máchová²,

Cvrčková³

et al. 2007

J. For. Sci.

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Micropropagated plantlets derived from selected clones of the hybrid aspen (Populus tremula × Populus tremuloides) and the rowan-tree (Sorbus aucuparia L.) were used to determine the comparative study of uptake of the toxic, heavy metals Cd, Pb and the essential metal Mn. Samples of roots and aboveground parts (hypocotyl-derived tissues, leaves and stems) were taken from the plantlets grown for 24, 48, 96, or 168 hrs under aseptic conditions, in hydroponics with the toxic heavy metal and the essential metal salts. The concentration and distribution of the accumulated metals were determined using the ICP-OES method. The differences in the uptake capacity of hybrid aspen and rowan-tree clones for Cd, Pb and Mn were identified. Generally, the amounts of accumulated Cd and particularly Pb were much higher in the roots of both hybrid aspen and rowan-tree clones, than in their shoots, at all sample times. Conversely, the amounts of accumulated Mn were significantly lower than Cd and Pb in all plant parts of the hybrid aspen and rowan-tree samples. Patterns of Mn uptake were similar in the above-mentioned tissues of both clones, at all sample times. We concluded that the two clones of hybrid aspen and rowan-tree, lacking auxiliary soil microbiota, can accumulate large amounts of the toxic heavy metals Cd (800-1,500 mg/kg) and Pb (5,000-13,000 mg/kg) in roots and about 100 mg/kg of Cd was determined in aboveground part of hybrid aspen.

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“…Among these species, Noccaea (formerly Thlaspi) caerulescens, a Brassicaceae that hyperaccumulates Zn, Cd and Ni, has been widely studied (Assunção et al 2003b). The species shows a large climatic and geographical range in Europe.…”

Section: Introductionmentioning

confidence: 99%

Metal concentration and metal mass of metallicolous, non metallicolous and serpentine Noccaea caerulescens populations, cultivated in different growth media

et al. 2013

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Aims Evaluate the genetic and environmental variability of metal concentration and metal mass of Noccaea caerulescens, from metalliferous (MET), non metalliferous (NMET) and serpentine (SERP) soils. Methods 18 populations were cultivated in 18 different growth conditions, such as a soil mine tailing, soils amended with zinc (Zn), cadmium (Cd) and nickel (Ni) salts (in mixtures or in monometallic salts) and a hydroponic solution with two Zn concentrations. Results MET populations had Zn concentrations lower than NMET and SERP in the different soils but higher Cd mass (the product of aerial biomass and foliar metal concentration). SERP had the highest Ni concentration and Ni mass values. The addition of Cd or Ni to a Zn-contaminated soil significantly decreases Zn concentration. In hydroponics, MET and NMET had equivalent Zn concentrations but these were three times higher than those obtained in soil experiments. Zn mass of NMET was significantly lower than MET with the latter having Zn mass values largely above those obtained in mine soil. Conclusions Results showed a large heterogeneity of responses among populations depending on the substrate used, and it was not possible to correctly assign a single population to its accurate origin with only one experiment. Finally, data on metal concentration obtained in culture soils are closer to those in field soils than those from hydroponics so that they could give a more accurate information on the accumulating capacity of Noccaea caerulescens and its use in phytoextraction of metals in field conditions.

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Thlaspi caerulescens, an attractive model species to study heavy metal hyperaccumulation in plants

Cited by 325 publications

References 81 publications

QTL analysis of cadmium and zinc accumulation in the heavy metal hyperaccumulator Thlaspi caerulescens

QTL analysis of cadmium and zinc accumulation in the heavy metal hyperaccumulator Thlaspi caerulescens

Heavy metals uptake by the hybrid aspen and rowan-tree clones

Metal concentration and metal mass of metallicolous, non metallicolous and serpentine Noccaea caerulescens populations, cultivated in different growth media

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