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

TY - JOUR

T1 - Regulation of calcium on accumulation and tolerance of Leersia hexandra Swart under Cr3+ stress

AU - Wang, Wenping

AU - Zhang, Hui

AU - Liu, Jie

AU - Huang, Xiaowu

AU - Gu, Chen

PY - 2013/12

Y1 - 2013/12

N2 - 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.

AB - 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.

KW - Calcium concentration

KW - Cr stress

KW - Leersia hexandra Swart

KW - Phytoremediation

UR - http://www.scopus.com/inward/record.url?scp=84894878587&partnerID=8YFLogxK

M3 - 文章

AN - SCOPUS:84894878587

SN - 1673-9108

VL - 7

SP - 5012

EP - 5018

JO - Chinese Journal of Environmental Engineering

JF - Chinese Journal of Environmental Engineering

IS - 12

ER -