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- W1995819795 abstract "Soil salinity usually increases bioavailability of Cd on heavy metal polluted soils but its impact on Cd absorption and accumulation by plants remains largely unknown. Plants from the halophyte species Atriplex halimus were therefore exposed for 12 and 14 days to nutrient solution containing 50 μM CdCl2 in the presence of NaCl, KCl or NaNO3 50 mM. Most Cd present in solution remained as Cd–EDTA and salinity had no impact on Cd speciation. Chloride salinity (NaCl and KCl) reduced Cd accumulation in shoots and roots while NaNO3 increased Cd accumulation in leaves. More than 30% of accumulated Cd was found at the leaf surface and accumulated in trichomes but all tested salts decreased the proportion of excreted Cd. Cadmium induced a decrease in the leaf water content. External NaCl and KCl mitigated the deleterious impact of Cd by inducing osmotic adjustment while NaNO3 and synthesis of protecting compounds such as soluble sugars and glycinebetaine. Free polyamines (putrescine, spermidine and spermine) increased in response to Cd, Cd + NaCl and Cd + KCl while only putrescine increased in response to Cd + NaNO3. Proline exhibited maximal concentration in the leaves of Cd + NaCl and Cd + KCl-treated plants and was correlated with osmotic adjustment. Our results suggest that chloride salinity improved the resistance of A. halimus to Cd toxicity both by decreasing the absorption of heavy metal and by improving tissular tolerance through an increase in the synthesis of osmoprotective compounds." @default.
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- W1995819795 date "2009-01-01" @default.
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- W1995819795 title "Chloride salinity reduces cadmium accumulation by the Mediterranean halophyte species Atriplex halimus L." @default.
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- W1995819795 doi "https://doi.org/10.1016/j.envexpbot.2008.07.005" @default.
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