naa a22 4500 510752527 CHVBK 20180411083109.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11270-013-1450-3 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1450-3 Growth Responses, Metal Accumulation and Phytoremoval Capability in Amaranthus Plants Exposed to Nickel Under Hydroponics [Elektronische Daten] [Valentina Iori, Fabrizio Pietrini, Alexandra Cheremisina, Nina Shevyakova, Nataliya Radyukina, Vladimir Kuznetsov, Massimo Zacchini] The characterisation of plant responses to metal exposure represents a basic step to select a plant species for phytoremediation. In the present work, 3-week-old Amaranthus paniculatus L. plants were subjected to nickel chloride concentrations of 0 (control), 25, 50, 100 and 150μM in hydroponic solution for 1week to evaluate morphophysiological responses, such as biomass production and partitioning, nickel accumulation in plants and nickel removal ability from the polluted solutions. The results showed a progressive decrease in plant organ dry mass with the enhancement of nickel (Ni) concentration in the solution, suggesting a good metal tolerance at 25μM Ni and a marked sensitivity at 150μM Ni. The modification of biomass partitioning was particularly appreciated in leaves, analysing the organ mass ratio, the total leaf area and the specific leaf area. Amaranthus plants accumulated a significant amount of Ni in roots exposed to the highest Ni concentrations, while lower metal contents were observed in the aerial organs. The Ni uptake ratio was progressively reduced in plants exposed to increased Ni concentrations. The metal translocation from root to shoots, appreciated by the Ni translocation index, showed a far lower value in Ni-exposed plants than in controls. Moreover, by measuring the daily Ni content of the solutions, a lower Ni removal ability was found in Amaranthus plants at increasing Ni concentrations. Remarkably, plants exposed to 25μM Ni succeeded in removing almost 60% of the initial Ni content of the solution showing no stress symptoms. The potential of A. paniculatus for phytoremediation was discussed. Springer Science+Business Media Dordrecht, 2013 Biomass partitioning nationallicence Heavy metals nationallicence Metal tolerance nationallicence Phytoremediation nationallicence Rhizofiltration nationallicence Iori Valentina Institute of Agro-environmental and Forest Biology, National Research Council of Italy, Via Salaria Km 29,300, 00015, Monterotondo Scalo, Rome, Italy aut Pietrini Fabrizio Institute of Agro-environmental and Forest Biology, National Research Council of Italy, Via Salaria Km 29,300, 00015, Monterotondo Scalo, Rome, Italy aut Cheremisina Alexandra Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya ul., 35, 127276, Moskow, Russia aut Shevyakova Nina Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya ul., 35, 127276, Moskow, Russia aut Radyukina Nataliya Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya ul., 35, 127276, Moskow, Russia aut Kuznetsov Vladimir Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya ul., 35, 127276, Moskow, Russia aut Zacchini Massimo Institute of Agro-environmental and Forest Biology, National Research Council of Italy, Via Salaria Km 29,300, 00015, Monterotondo Scalo, Rome, Italy aut Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-10 0049-6979 224:2<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1450-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1450-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Iori Valentina Institute of Agro-environmental and Forest Biology, National Research Council of Italy, Via Salaria Km 29,300, 00015, Monterotondo Scalo, Rome, Italy aut NATIONALLICENCE 700 1- Pietrini Fabrizio Institute of Agro-environmental and Forest Biology, National Research Council of Italy, Via Salaria Km 29,300, 00015, Monterotondo Scalo, Rome, Italy aut NATIONALLICENCE 700 1- Cheremisina Alexandra Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya ul., 35, 127276, Moskow, Russia aut NATIONALLICENCE 700 1- Shevyakova Nina Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya ul., 35, 127276, Moskow, Russia aut NATIONALLICENCE 700 1- Radyukina Nataliya Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya ul., 35, 127276, Moskow, Russia aut NATIONALLICENCE 700 1- Kuznetsov Vladimir Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya ul., 35, 127276, Moskow, Russia aut NATIONALLICENCE 700 1- Zacchini Massimo Institute of Agro-environmental and Forest Biology, National Research Council of Italy, Via Salaria Km 29,300, 00015, Monterotondo Scalo, Rome, Italy aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-10 0049-6979 224:2<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer