Topic
Zinc toxicity
About: Zinc toxicity is a research topic. Over the lifetime, 727 publications have been published within this topic receiving 34583 citations. The topic is also known as: zinc poisoning.
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TL;DR: Protection against zinc toxicity was obtained with pyrithione, inositol hexakisphosphate, ethylenediamine tetraacetate, EDTA and N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamines (TPEN), and the affinity for zinc within this range does not appear to be a major factor affecting the ability of chelators to provide neuroprotection.
60 citations
TL;DR: Results confirm that metals are released to streams from active lead-zinc mining sites and are accumulated by fish.
60 citations
TL;DR: This study describes the growth inhibition of C. vulgaris exposed to different concentrations of cadmium and zinc, and the induction of metal-binding MT-like proteins in the cells, and suggests that these proteins might be involved in the detoxification of heavy metals by the alga.
59 citations
TL;DR: This study demonstrates that metabolomics is a useful technique to test for low level toxicity which does not manifest in mortality or condition index changes, and stresses that it is important to consider age/size when conducting metabolomic and ecotoxicology assessments.
59 citations
TL;DR: It is suggested that rhizobacterium strain RL9 could be exploited for bacteria-assisted reduction of zinc toxicity in zinc-contaminated soils due to its intrinsic abilities of expressing growth-promoting substances and reduction of the toxic effects of zinc.
Abstract: Though zinc is a plant nutrient at low levels, Zn ions can be highly phytotoxic at higher concentrations found in contaminated soils. Plant growth-promoting rhizobacteria can be used to decrease this toxicity. Indeed, in addition to their role in plant-growth promotion, rhizobacteria also reduce the toxicity of heavy metals. In turn, they can be effective for crops grown in metal-contaminated soils. Here, we isolated a zinc-tolerant plant growth-promoting rhizobacterium, Rhizobium species RL9, from a zinc-contaminated soil and assayed its plant growth-promoting activities in vitro. We found that the rhizobacterium strain RL9 tolerated zinc up to a concentration of 400 μg mL−1 on yeast extract mannitol agar medium. It produced 33 μg mL−1 of indole acetic acid in Luria Bertani broth at 100 μg mL−1 of tryptophan and was positive for siderophore, hydrogen cyanide and ammonia. Such phytohormones released by this strain could help in promoting the growth of legumes. We further tested the effect of rhizobacterium strain RL9 on lentils grown in zinc-amended soil. We found that when the rhizobacterium strain RL9 was added to soil contaminated with Zn at 4890 mg/kg, lentil dry matter increased by 150%, nodule numbers by 15%, nodule dry mass by 27%, leghaemogloblin by 30%, seed yield by 10% and grain protein by 8%, compared with uninoculated plants. We also found that the concentration of zinc was higher in uninoculated plant organs than in the inoculated counterpart. Our findings thus suggest that rhizobacterium strain RL9 could be exploited for bacteria-assisted reduction of zinc toxicity in zinc-contaminated soils due to its intrinsic abilities of expressing growth-promoting substances and reduction of the toxic effects of zinc.
59 citations