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Suryawanshi, Vasantika ; Talke, Ina N. ; Weber, Michael ; Eils, Roland ; Brors, Benedikt ; Clemens, Stephan ; Krämer, Ute:
Between-species differences in gene copy number are enriched among functions critical for adaptive evolution in Arabidopsis halleri.
In: BMC Genomics.
Bd. 17
(2016)
Heft Suppl. 13
.
- 1034.
ISSN 1471-2164
DOI: https://doi.org/10.1186/s12864-016-3319-5
Abstract
Gene copy number divergence between species is a form of genetic polymorphism that contributes significantly to both genome size and phenotypic variation. In plants, copy number expansions of single genes were implicated in cultivar- or species-specific tolerance of high levels of soil boron, aluminium or calamine-type heavy metals, respectively. Arabidopsis halleri is a zinc- and cadmium-hyperaccumulating extremophile species capable of growing on heavy-metal contaminated, toxic soils. In contrast, its non-accumulating sister species A. lyrata and the closely related reference model species A. thaliana exhibit merely basal metal tolerance.