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Toxicity and deficiency of copper in Elsholtzia splendens affect photosynthesis biophysics, pigments and metal accumulation

Toxicity and deficiency of copper in Elsholtzia splendens affect photosynthesis biophysics, pigments and metal accumulation

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PENG, Hongyun, Peter KRONECK, Hendrik KÜPPER, 2013. Toxicity and deficiency of copper in Elsholtzia splendens affect photosynthesis biophysics, pigments and metal accumulation. In: Environmental Science & Technology. 47(12), pp. 6120-6128. ISSN 0013-936X. eISSN 1520-5851. Available under: doi: 10.1021/es3050746

@article{Peng2013-06-18Toxic-24900, title={Toxicity and deficiency of copper in Elsholtzia splendens affect photosynthesis biophysics, pigments and metal accumulation}, year={2013}, doi={10.1021/es3050746}, number={12}, volume={47}, issn={0013-936X}, journal={Environmental Science & Technology}, pages={6120--6128}, author={Peng, Hongyun and Kroneck, Peter and Küpper, Hendrik} }

Küpper, Hendrik Environmental Science & Technology ; 47 (2013), 12. S. 6120–6128 2013-10-22T08:31:27Z Kroneck, Peter eng Toxicity and deficiency of copper in Elsholtzia splendens affect photosynthesis biophysics, pigments and metal accumulation Küpper, Hendrik Peng, Hongyun deposit-license Elsholtzia splendens is a copper-tolerant plant species growing on copper deposits in China. Spatially and spectrally resolved kinetics of in vivo absorbance and chlorophyll fluorescence in mesophyll of E. splendens were used to investigate the copper-induced stress from deficiency and toxicity as well as the acclimation to excess copper stress. The plants were cultivated in nutrient solutions containing either Fe(III)–EDTA or Fe(III)–EDDHA. Copper toxicity affected light-acclimated electron flow much stronger than nonphotochemical quenching (NPQ) or dark-acclimated photochemical efficiency of PSIIRC (Fv/Fm). It also changed spectrally resolved Chl fluorescence kinetics, in particular by strengthening the short-wavelength (<700 nm) part of NPQ altering light harvesting complex II (LHCII) aggregation. Copper toxicity reduced iron accumulation, decreased Chls and carotenoids in leaves. During acclimation to copper toxicity, leaf copper decreased but leaf iron increased, with photosynthetic activity and pigments recovering to normal levels. Copper tolerance in E. splendens was inducible; acclimation seems be related to homeostasis of copper and iron in E. splendens. Copper deficiency appeared at 10 mg copper per kg leaf DW, leading to reduced growth and decreased photosynthetic parameters (F0, Fv/Fm, ΦPSII). The importance of these results for evaluating responses of phytoremediation plants to stress in their environment is discussed. Kroneck, Peter 2013-10-22T08:31:27Z 2013-06-18 Peng, Hongyun

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