NaCl alleviates Cd toxicity by changing its chemical forms of accumulation in the halophyte Sesuvium portulacastrum

Environmental Science and Pollution Research International
Mariem WaliTahar Ghnaya

Abstract

It has previously been shown that certain halophytes can grow and produce biomass despite of the contamination of their saline biotopes with toxic metals. This suggests that these plants are able to cope with both salinity and heavy metal constraints. NaCl is well tolerated by halophytes and apparently can modulate their responses to Cd. However, the underlying mechanisms remain unclear. This study explores the impact of NaCl on growth, Cd accumulation, and Cd speciation in tissues of the halophyte Sesuvium portulacastrum. Seedlings of S. portulacastrum were exposed during 1 month to 0, 25, and 50 μM Cd combined with low salinity (LS, 0.09 mM NaCl) or high salinity (HS, 200 mM NaCl) levels. Growth parameters and total tissue Cd concentrations were determined, in leaves, stems, and root. Moreover, Cd speciation in these organs was assessed by specific extraction procedures. Results showed that, at LS, Cd induced chlorosis and necrosis and drastically reduced plant growth. However, addition of 200 mM NaCl to Cd containing medium alleviated significantly Cd toxicity symptoms and restored plant growth. NaCl reduced the concentration of Cd in the shoots; nevertheless, due to maintenance of higher biomass under HS, the quantity of ac...Continue Reading

References

Dec 1, 1995·Plant Physiology·D. E. SaltI. Raskin
Jan 12, 2005·Journal of Experimental Botany·Claudia CosioCatherine Keller
Sep 26, 2006·Environmental Pollution·Rosa Reboreda, Isabel Caçador
Apr 3, 2007·Bulletin of Environmental Contamination and Toxicology·M KomárekV Chrastný
Oct 5, 2007·Journal of Plant Physiology·Alexander KrantevLosanka Popova
Dec 17, 2008·Trends in Plant Science·Shanti S Sharma, Karl-Josef Dietz
Mar 17, 2009·Plant Physiology and Biochemistry : PPB·Hiram A Castillo-MichelJorge L Gardea-Torresdey
Jun 23, 2011·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Qiu QiuJiangang Yuan
Feb 2, 2012·Environmental Science and Pollution Research International·Fernando Reboredo
Jul 24, 2012·Plant Physiology and Biochemistry : PPB·Magdalena Arasimowicz-JelonekEdward A Gwóźdź
Jan 28, 2014·Planta·Jennifer J Cappa, Elizabeth A H Pilon-Smits

❮ Previous
Next ❯

Citations

Mar 31, 2016·Environmental Science and Pollution Research International·Chengjun ZhangCaixian Tang
Apr 16, 2018·Environmental Science and Pollution Research International·Ming-Xi ZhouStanley Lutts
Jul 10, 2019·Frontiers in Plant Science·Xiliang SongXu Li
May 24, 2019·Environmental Science and Pollution Research International·Emna FouratiTahar Ghnaya
Jan 13, 2018·Journal of Agricultural and Food Chemistry·Chun-Tao HeZhong-Yi Yang

❮ Previous
Next ❯

Related Concepts

Related Feeds

Bioremediation (ASM)

Bioremediation is the treatment and removal of harmful pollutants or contaminants through the use of microorganisms. Discover the latest research here.