Regulation of calcium on accumulation and tolerance of Leersia hexandra Swart under Cr3+ stress

Wenping Wang, Hui Zhang*, Jie Liu, Xiaowu Huang, Chen Gu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The relationship between calcium and Cr3+ tolerance in an accumulating plant Leersiahexandra Swartz was studied by hydroponics experiments. The results showed that under calcium deficiency, the content of total oxalate in Leersiahexandra Swartz approached 113%~169% of that of the control group, and the increase of the total oxalate content was characterized by the increase of the water-soluble oxalate which accounting for 135%~197% of that of the control group. But the growth of Leersiahexandra Swartz was adversely affected and the damage of membrane lipid peroxidation of plant was accelerated. With the addition of 10 mmol/L Ca2+ solution, the electrolyte leakages and the membrane lipid peroxidation of plant significantly decrease. The content of total oxalate was about 125%~155% of that of control group, and the increase of the insoluble oxalate accounted for 181%~270% of that of control group. And by 10 mmol/L Ca2+ addition treatment, the total chromium concentration of Leersiahexandra Swartz which grown in a nutrient solution containing 0.2 and 0.4 mmol/L Cr3+ reached 125%~155% of that of the control group, but there was no significant difference between the control group and the high concentration of Cr3+ (0.8 and 1.0 mmol/L) groups. These results suggested that calcium may act as an important role to effectively promote the oxalic acid and chelate with oxalic acid chromium, and takes part in detoxifying chromium in internal of process of Leersiahexandra Swartz.

Original languageEnglish
Pages (from-to)5012-5018
Number of pages7
JournalChinese Journal of Environmental Engineering
Volume7
Issue number12
StatePublished - Dec 2013
Externally publishedYes

Keywords

  • Calcium concentration
  • Cr stress
  • Leersia hexandra Swart
  • Phytoremediation

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