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Sodium chloride enhances cadmium tolerance through reducing cadmium accumulation and increasing anti‐oxidative enzyme activity in tobacco
Courtesy of John Wiley & Sons, Ltd.
The effect of sodium chloride (NaCl) on cadmium (Cd) uptake, translocation and oxidative stress was investigated using two tobacco cultivars differing in Cd tolerance. The growth inhibition of the tobacco plants exposed to Cd toxicity was in part alleviated by moderate addition of NaCl in the culture solution. Cd concentration of shoots and roots in the two cultivars increased with increasing Cd level in the solution, while reduced by addition of NaCl. Addition of NaCl could alleviate the oxidative stress caused by Cd toxicity, as reflected by reduced production of malondialdehyde (MDA) and recovered or enhanced activities of anti‐oxidative enzymes catalase (CAT) and glutathione peroxidiase (GPX). The results also showed that the enhancement of anti‐oxidative enzyme activity by NaCl for the tobacco plants exposed to Cd stress is related to the induced calcium signaling. Environ. Toxicol. Chem. © 2013 SETAC
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