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  • Germination and root elongation bioassays in six different plant species for testing Ni contamination in soil.

Germination and root elongation bioassays in six different plant species for testing Ni contamination in soil.

Bulletin of environmental contamination and toxicology (2013-11-30)
Giovanna Visioli, Federica D Conti, Ciro Gardi, Cristina Menta
摘要

In vitro short-term chronic phytotoxicity germination and root elongation test were applied to test the effects of nickel (Ni) in seed germination and root elongation in six plants species: Cucumis sativus (Cucurbitaceae), Lepidium sativum and Brassica nigra (Brassicaceae), Trifolium alexandrinum and Medicago sativa (Fabaceae), Phacelia tanacetifolia (Boraginaceae). A naturally Ni rich soil was used to compare the results obtained. Unlike root elongation, germination was not affected by Ni in any of the six species tested. EC50 values, calculated on the root elongation, showed that Ni toxicity decreases in the following order: P. tanacetifolia > B. nigra > C. sativus > L. sativum > M. sativa > T. alexandrinum. The test conducted using soil elutriate revealed a significantly lower effect in both seed germination and root elongation when compared to the results obtained using untreated soil. Conversely, the test performed on soil confirmed the high sensitivity of C. sativus, P. tanacetifolia and L. sativum to Ni.

材料
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产品描述

Sigma-Aldrich
Raney®-镍, W.R. Grace and Co. Raney®2800, slurry, in H2O, active catalyst
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镍, powder, <50 μm, 99.7% trace metals basis
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镍, nanopowder, <100 nm avg. part. size, ≥99% trace metals basis
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镍, powder, <150 μm, 99.99% trace metals basis
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镍, foil, thickness 0.125 mm, ≥99.9%
镍, foam, 150x150mm, thickness 1.6mm, bulk density 0.45g/cm3, porosity 95%, 95%
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Raney®-镍, W.R. Grace and Co. Raney®4200, slurry, in H2O, active catalyst
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镍, powder, <1 μm, 99.8% trace metals basis
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镍, foil, thickness 0.5 mm, 99.98% trace metals basis
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Raney®-镍, W.R. Grace and Co. Raney®2400, slurry, in H2O, active catalyst
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镍, wire, diam. 0.5 mm, ≥99.9% trace metals basis
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镍, foil, thickness 0.1 mm, 99.98% trace metals basis
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镍, wire, diam. 0.25 mm, ≥99.9%
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镍, rod, diam. 6.35 mm, ≥99.99% trace metals basis
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Raney®-镍, W.R. Grace and Co. Raney®3202, slurry, in H2O, active catalyst
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镍, wire, diam. 0.5 mm, ≥99.99% trace metals basis
镍, tube, 500mm, outside diameter 1.8mm, inside diameter 1.6mm, wall thickness 0.1mm, hard, 99.5%
镍, wire reel, 20m, diameter 0.025mm, as drawn, 99.98%
镍, wire reel, 1m, diameter 1.0mm, as drawn, 99%
镍, mesh, 100x250mm, nominal aperture 0.73mm, wire diameter 0.25mm, 26x26 wires/inch, open area 55%, plain weave mesh, 99%
镍, sphere, 100pcs, diameter 1.0mm, precision sphere grade 200, 99%
镍, foil, 50x50mm, thickness 0.30mm, as rolled, 99.98%
镍, wire reel, 5m, diameter 1.0mm, hard, 99.98%
镍, wire reel, 1m, diameter 0.75mm, as drawn, 99%
镍, rod, 100mm, diameter 12.7mm, 99.98%
镍, sphere, 200pcs, diameter 3.0mm, precision sphere grade 200, 99%
镍, foil, light tested, 100x100mm, thickness 0.015mm, 99.9%
镍, foil, 10mm disks, thickness 0.15mm, annealed, 99%
镍, foil, 4mm disks, thickness 0.075mm, annealed, 99%
镍, foil, 4mm disks, thickness 0.075mm, as rolled, 99.98%

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