A quantitative trait loci analysis of Zinc hyperaccumulation in <i>Arabidopsis halleri</i>

Filatov, Victor; Dowdle, John; Smirnoff, Nicholas; Ford‐Lloyd, B. V.; Newbury, H. J.; Macnair, Mark R.

doi:10.1111/j.1469-8137.2007.02036.x

Cited by 37 publications

(26 citation statements)

References 37 publications

(119 reference statements)

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“…The authors also detected a QTL region on chromosome 7 between 4‐09207 and 4‐16390 markers, which was adjacent to the QTL identified in the present study (between 4‐16390 and 4‐17540). Filatov et al. (2007) constructed a linkage map between A. halleri and A. lyrata petraea based on 25 markers and assessed Zn hyperaccumulation using hydroponics at two Zn concentrations.…”

Section: Discussionmentioning

confidence: 99%

Genetic architecture of zinc hyperaccumulation in Arabidopsis halleri: the essential role of QTL × environment interactions

et al. 2010

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Summary• This study sought to determine the main genomic regions that control zinc (Zn) hyperaccumulation in Arabidopsis halleri and to examine genotype · environment effects on phenotypic variance. To do so, quantitative trait loci (QTLs) were mapped using an interspecific A. halleri · Arabidopsis lyrata petraea F 2 population.• The F 2 progeny as well as representatives of the parental populations were cultivated on soils at two different Zn concentrations. A linkage map was constructed using 70 markers.• In both low and high pollution treatments, zinc hyperaccumulation showed high broad-sense heritability (81.9 and 74.7%, respectively). Five significant QTLs were detected: two QTLs specific to the low pollution treatment (chromosomes 1 and 4), and three QTLs identified at both treatments (chromosomes 3, 6 and 7). These QTLs explained 50.1 and 36.5% of the phenotypic variance in low and high pollution treatments, respectively. Two QTLs identified at both treatments (chromosomes 3 and 6) showed significant QTL · environment interactions.• The QTL on chromosome 3 largely colocalized with a major QTL previously identified for Zn and cadmium (Cd) tolerance. This suggests that Zn tolerance and hyperaccumulation share, at least partially, a common genetic basis and may have simultaneously evolved on heavy metal-contaminated soils.

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Section: Discussionmentioning

confidence: 99%

Genetic architecture of zinc hyperaccumulation in Arabidopsis halleri: the essential role of QTL × environment interactions

et al. 2010

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“…, 2009), as well as to determine QTLs associated with metal tolerance and/or accumulation trait (Deniau et al. , 2006; Filatov et al. , 2007; Willems et al.…”

Section: Discussionmentioning

confidence: 99%

Zinc distribution and speciation in Arabidopsis halleri × Arabidopsis lyrata progenies presenting various zinc accumulation capacities

et al. 2009

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Key words: Arabidopsis halleri, Arabidopsis lyrata, extended X-ray absorption fine structure (EXAFS) spectroscopy, interspecific crossing, micro X-ray fluorescence (lXRF), scanning electron microscopy coupled to energy dispersive X-ray analysis (SEM-EDX). Summary• The purpose of this study was to investigate the relationship between the chemical form and localization of zinc (Zn) in plant leaves and their Zn accumulation capacity.• An interspecific cross between Arabidopsis halleri sp. halleri and Arabidopsis lyrata sp. petrea segregating for Zn accumulation was used. Zinc (Zn) speciation and Zn distribution in the leaves of the parent plants and of selected F 1 and F 2 progenies were investigated by spectroscopic and microscopic techniques and chemical analyses.• A correlation was observed between the proportion of Zn being in octahedral coordination complexed to organic acids and free in solution (Zn-OAs + Zn aq ) and Zn content in the leaves. This pool varied between 40% and 80% of total leaf Zn depending on the plant studied. Elemental mapping of the leaves revealed different Zn partitioning between the veins and the leaf tissue. The vein : tissue fluorescence ratio was negatively correlated with Zn accumulation.• The higher proportion of Zn-OAs + Zn aq and the depletion of the veins in the stronger accumulators are attributed to a higher xylem unloading and vacuolar sequestration in the leaf cells. Elemental distributions in the trichomes were also investigated, and results support the role of carboxyl and ⁄ or hydroxyl groups as major Zn ligands in these cells.

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“…, 2006). In A. halleri , only two accessions, either from France (Auby) or from Germany (Langelsheim), were referred to in the literature (Filatov et al. , 2007; Willems et al.…”

Section: Motivating Perspectives For Evolutionary Biologistsmentioning

confidence: 99%

A challenge for hyperaccumulating plant models: ‘cycling’ as fast as Arabidopsis thaliana

Frérot

2010

New Phytologist

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A quantitative trait loci analysis of Zinc hyperaccumulation in Arabidopsis halleri

Cited by 37 publications

References 37 publications

Genetic architecture of zinc hyperaccumulation in Arabidopsis halleri: the essential role of QTL × environment interactions

Genetic architecture of zinc hyperaccumulation in Arabidopsis halleri: the essential role of QTL × environment interactions

Zinc distribution and speciation in Arabidopsis halleri × Arabidopsis lyrata progenies presenting various zinc accumulation capacities

A challenge for hyperaccumulating plant models: ‘cycling’ as fast as Arabidopsis thaliana

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