Pseudometallophytes are commonly used to study the evolution of metal tolerance and accumulation traits in plants. Within the Arabidopsis genus, the adaptation of Arabidopsis halleri to metalliferous soils has been widely studied, which is not the case for the closely related species Arabidopsis arenosa. We performed an in‐depth physiological comparison between the A. halleri and A. arenosa populations from the same polluted site, together with the geographically close non‐metallicolous (NM) populations of both species. The ionomes, growth, photosynthetic parameters and pigment content were characterized in the plants that were growing on their native site and in a hydroponic culture under Cd treatments. In situ, the metallicolous (M) populations of both species hyperaccumulated Cd and Zn. The NM population of A. halleri hyperaccumulated Cd and Zn while the NM A. arenosa did not. In the hydroponic experiments, the NM populations of both species accumulated more Cd in their shoots than the M populations. Our research suggests that the two Arabidopsis species evolved different strategies of adaptation to extreme metallic environments that involve fine regulation of metal homeostasis, adjustment of the photosynthetic apparatus and accumulation of flavonols and anthocyanins.

中文翻译：

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拟南芥和拟南芥对Cd的耐受性和积累策略不同。

伪金属植物通常用于研究植物中金属耐性和积累性状的演变。在拟南芥属中，已经广泛研究了拟南芥对含金属土壤的适应性，而与紧密相关的拟南芥种不是这种情况。我们对A进行了深入的生理比较。halleri和一个。竞技场来自同一污染地点的种群，以及两个物种在地理上接近的非金属（NM）种群。离子组，生长，光合作用参数和色素含量在生长于其天然位点和在Cd处理下进行水培的植物中进行了表征。在原位，这两个物种的金属态（M）种群都过度积累了Cd和Zn。A的NM种群。NM A时Halleri的Cd和Zn积累过多。槟榔没有。在水培实验中，两个物种的NM种群在其芽中积累的Cd均比M种群多。我们的研究表明，两个拟南芥 物种进化出了不同的适应极端金属环境的策略，这些策略涉及金属稳态的精细调节，光合装置的调节以及黄酮醇和花青素的积累。