On the evolution of heavy‐metal tolerant populations in <i>Armeria maritima</i>: evidence from allozyme variation and reproductive barriers

Vekemans, Xavier; Lefèbvre, Claude

doi:10.1046/j.1420-9101.1997.10020175.x

Cited by 76 publications

(95 citation statements)

References 21 publications

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“…However, no differences in genetic diversity between metallicolous and nonmetallicolous populations have been consistently found in the species investigated to date (Vekemans and Lefèbvre, 1997;Quintela-Sabarís et al, 2010), such as A. halleri (Pauwels et al, 2005), A. bertolonii (Mengoni et al, 2003) and M. laricifolia ssp. ophiolitica (Moore et al, 2013), and neither have they been found here (Table 2).…”

Section: Discussionmentioning

confidence: 94%

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Evolution of nickel hyperaccumulation and serpentine adaptation in the Alyssum serpyllifolium species complex

et al. 2016

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Metal hyperaccumulation is an uncommon but highly distinctive adaptation found in certain plants that can grow on metalliferous soils. Here we review what is known about evolution of metal hyperaccumulation in plants and describe a population-genetic analysis of the Alyssum serpyllifolium (Brassicaceae) species complex that includes populations of nickelhyperaccumulating as well as non-accumulating plants growing on serpentine (S) and non-serpentine (NS) soils, respectively. To test whether the S and NS populations belong to the same or separate closely related species, we analysed genetic variation within and between four S and four NS populations from across the Iberian peninsula. Based on microsatellites, genetic variation was similar in S and NS populations (average H o = 0.48). The populations were significantly differentiated from each other (overall F ST = 0.23), and the degree of differentiation between S and NS populations was similar to that within these two groups. However, high S versus NS differentiation was observed in DNA polymorphism of two genes putatively involved in adaptation to serpentine environments, IREG1 and NRAMP4, whereas no such differentiation was found in a gene (ASIL1) not expected to play a specific role in ecological adaptation in A. serpyllifolium. These results indicate that S and NS populations belong to the same species and that nickel hyperaccumulation in A. serpyllifolium appears to represent a case of adaptation to growth on serpentine soils. Further functional and evolutionary genetic work in this system has the potential to significantly advance our understanding of the evolution of metal hyperaccumulation in plants.

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Section: Discussionmentioning

confidence: 94%

“…ophiolitica (Moore et al, 2013), and neither have they been found here (Table 2). However, the bottlenecks in question would need to have been quite recent to stand out in this way, and gene flow and accumulation of new mutations would later erode the signal of any putative bottlenecks (Vekemans and Lefèbvre, 1997).…”

Section: Discussionmentioning

confidence: 99%

Evolution of nickel hyperaccumulation and serpentine adaptation in the Alyssum serpyllifolium species complex

et al. 2016

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“…Genetic evidence exists for multiple independent evolutionary origins of tolerant populations to heavy metals (Vekemans and Lefèbvre, 1997). The populations only develop tolerance for different metals when these are present at high concentrations in the soil of origin.…”

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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“…In an evolutionary perspective, serpentine soils might be considered, similar to other metal contaminated soils, as "ecological islands" (Lefèbvre and Vernet 1990), inhabited by particular, often endemic, taxa. The ecological island model has boosted much research on evolution and adaptation and provoked discussion on the microevolutionary dynamics of metal tolerance and metal hyperacumulation in plants, from the population to the single-gene level (for examples see Berglund et al 2004;Kazakou et al 2008;Mengoni et al 2003a;Mengoni et al 2003b;Rajakaruna et al 2003;Vekemans and Lefèbvre 1997). Despite the long history of interest in serpentine plants, the attention of microbiologists towards bacteria from serpentine habitats is more recent, with the relevant exception of Lipman (1926), and intimately linked to the peculiar botanical features of serpentine outcrops.…”

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confidence: 99%

Plants as extreme environments? Ni-resistant bacteria and Ni-hyperaccumulators of serpentine flora

2009

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During recent years there has been an increasing interest in the bacterial communities occurring in unusual, often extreme, environments. On serpentine outcrops around the world, a high diversity of plant species showing the peculiar features of metal hyperaccumulation is present. These metal hyperaccumulators have received much attention for their potential biotechnological exploitation in phytoremediation processes, but also as unusual, extreme habitats for the associated bacterial flora, which could reveal novel details concerning bacterial adaptation. This paper will briefly focus on the research topics that have been addressed to date on bacteria associated with serpentine plants and aims to provide a state of the art and to present possible future directions for research which could lead to new insights on microbial adaptation and evolution, and potentially applied in technologies for sustainable use and remediation of contaminated land.

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On the evolution of heavy‐metal tolerant populations in Armeria maritima: evidence from allozyme variation and reproductive barriers

Cited by 76 publications

References 21 publications

Evolution of nickel hyperaccumulation and serpentine adaptation in the Alyssum serpyllifolium species complex

Evolution of nickel hyperaccumulation and serpentine adaptation in the Alyssum serpyllifolium species complex

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

Plants as extreme environments? Ni-resistant bacteria and Ni-hyperaccumulators of serpentine flora

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