Cd-induced growth reduction in the halophyte Sesuvium portulacastrum is significantly improved by NaCl

Abstract

The effects of Cd(2+) and NaCl, applied together or separately, on growth and uptake of Cd(2+) were determined for the halophyte Sesuvium portulacastrum L. Seedlings were cultivated in the presence of 50 or 100 micromol L(-1) Cd(2+) alone or combined with 100 or 400 mmol L(-1) NaCl. Data showed that alone, Cd(2+) induced chlorosis, necrosis, and inhibited growth. Addition of NaCl to Cd(2+)-containing medium restored growth and alleviated the toxicity, however. NaCl also enhanced the amounts of Cd(2+) accumulated in the shoots. All Cd(2+) treatment reduced K(+) and Ca(2+) uptake and transport to the shoots. Accumulation of Na(+) in the shoots was not affected by Cd(2+), however. Thus S. portulacastrum maintained its halophytic characteristics in the presence of Cd(2+). We suggest this halophyte could be used for phytoextraction of Cd(2+) from salt-contaminated sites.

Cadmium accumulation and tolerance of Macleaya cordata: a newly potential plant for sustainable phytoremediation in Cd-contaminated soil

“…BCF indicates the efficiency of a plant species in accumulating a metal into its tissues from the surrounding environment (Ladislas et al 2012). TF indicates the efficiency of the plant in translocating the accumulated metal from its roots to shoots (Ghnaya et al 2007). Metal extraction amount indicates the metal amount which the whole plant tissue extracted from the contaminated soil at the harvest time.…”

Soil Biogeochemistry, Plant Physiology, and Phytoremediation of Cadmium-Contaminated Soils

“…NaCl addition increased Cd uptake and translocation in Sesuvium portulacastrum (Ghnaya et al, 2007), wheat , and cole (Raziuddin et al, 2011). Chai et al (2013) reported that addition of a moderate concentration of NaCl significantly increased Cd content in shoots and roots of halophyte Spartina alterniflora.…”

Sesuvium portulacastrum (L.) L. a promising halophyte: cultivation, utilization and distribution in India

“…Wherein, the growth reduction at high salinity was essentially due to nutritional disruption by salt. Furthermore, plants exhibit the highest accumulation capacity for heavy metals like cadmium (Cd), providing its importance in the environment protection by the extraction of heavy metals from salty contaminated soils (Ghnaya et al 2005). Slama et al (2007) found that, the system is also useful to study the drought stress caused by mannitol and PEG with elevated levels of osmolytes and reduced growth in osmotically stressed plants.…”