Different strategies of Cd tolerance and accumulation in Arabidopsis halleri and Arabidopsis arenosa

• DOI: 10.1111/pce.13883
• Publication Date: 2020-09-05T18:59:16Z
• Authors: Michał Szopiński; Krzysztof Sitko; Szymon Rusinowski; Paulina Zieleźnik...; Massimiliano Corso; Adam Rostański; Magdalena Rojek‐J...; Nathalie Verbruggen; Eugeniusz Małkowski
• Keywords: [SDV.BBM.MN]Life Sciences [q-bio]/Biochemistry; 570; cadmium; [SDV.BBM]Life Sciences [q-bio]/Biochemistry; Arabidopsis; [SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry; [SDV.BID]Life Sciences [q-bio]/Biodiversity; Anthocyanins; 03 medical and health sciences; hyperaccumulation; Hydroponics; Physiologie générale; Stress, Physiological; [SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Genomics [q-bio.GN]; [SDV.BV]Life Sciences [q-bio]/Vegetal Biology; [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology; electron transport; Photosynthesis; heavy metals; Molecular Biology; 580; Flavonoids; Molecular Biology/Genomics [q-bio.GN]; 0303 health sciences; photosynthesis; Ploidies; chlorophyll fluorescence; Molecular Biology/Molecular Networks [q-bio.MN]; Chlorophyll A; photosystem II; [SDV.BBM.MN]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular Networks [q-bio.MN]; 15. Life on land; Adaptation, Physiological; Bioaccumulation; [SDV.BV.AP]Life Sciences [q-bio]/Vegetal Biology/Plant breeding; Botanique générale; Cadmium

AbstractPseudometallophytes 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.