Abstract
The effects of Cd2+ and NaCl, applied together or separately, on growth and uptake of Cd2+ were determined for the halophyte Sesuvium portulacastrum L. Seedlings were cultivated in the presence of 50 or 100 μmol L−1 Cd2+ alone or combined with 100 or 400 mmol L−1 NaCl. Data showed that alone, Cd2+ induced chlorosis, necrosis, and inhibited growth. Addition of NaCl to Cd2+-containing medium restored growth and alleviated the toxicity, however. NaCl also enhanced the amounts of Cd2+ accumulated in the shoots. All Cd2+ treatment reduced K+ and Ca2+ uptake and transport to the shoots. Accumulation of Na+ in the shoots was not affected by Cd2+, however. Thus S. portulacastrum maintained its halophytic characteristics in the presence of Cd2+. We suggest this halophyte could be used for phytoextraction of Cd2+ from salt-contaminated sites.
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Acknowledgments
This work was achieved in the Laboratory of Plant Adaptation to Abiotic stresses. It was supported by the PRC project “Utilisation des halophytes pour la réhabilitation et la valorisation des sols salins” of the Tunisian Minister of Scientific Research, Technology and Competence Development.
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Ghnaya, T., Slama, I., Messedi, D. et al. Cd-induced growth reduction in the halophyte Sesuvium portulacastrum is significantly improved by NaCl. J Plant Res 120, 309–316 (2007). https://doi.org/10.1007/s10265-006-0042-3
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DOI: https://doi.org/10.1007/s10265-006-0042-3