Evolutionary dynamics of quantitative variation in an adaptive trait at the regional scale: The case of zinc hyperaccumulation in Arabidopsis halleri

Molecular Ecology
Alicja Babst-KosteckaHélène Frérot

Abstract

Metal hyperaccumulation in plants is an ecological trait whose biological significance remains debated, in particular because the selective pressures that govern its evolutionary dynamics are complex. One of the possible causes of quantitative variation in hyperaccumulation may be local adaptation to metalliferous soils. Here, we explored the population genetic structure of Arabidopsis halleri at fourteen metalliferous and nonmetalliferous sampling sites in southern Poland. The results were integrated with a quantitative assessment of variation in zinc hyperaccumulation to trace local adaptation. We identified a clear hierarchical structure with two distinct genetic groups at the upper level of clustering. Interestingly, these groups corresponded to different geographic subregions, rather than to ecological types (i.e., metallicolous vs. nonmetallicolous). Also, approximate Bayesian computation analyses suggested that the current distribution of A. halleri in southern Poland could be relictual as a result of habitat fragmentation caused by climatic shifts during the Holocene, rather than due to recent colonization of industrially polluted sites. In addition, we find evidence that some nonmetallicolous lowland populations may ha...Continue Reading

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Citations

Sep 15, 2018·Journal of Experimental Botany·Julien NowakMaxime Pauwels
Sep 26, 2019·American Journal of Botany·Grace L McCarthaA Joseph Pollard
Nov 14, 2019·Metallomics : Integrated Biometal Science·Alicja Babst-KosteckaJolanta Mesjasz-Przybyłowicz
Jun 11, 2020·Plant, Cell & Environment·Anna ManaraGiovanni DalCorso
May 6, 2020·Plants·Habiba BalafrejMouna Fahr
Sep 6, 2020·Plant, Cell & Environment·Michał SzopińskiEugeniusz Małkowski

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