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Effects of Mercury(Hg) and Cadmiumm(Cd) Combined Pollution on the Physiological and Biochemical Indexes of Lythrum salicaria(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2013年18期
Page:
74-77
Research Field:
Publishing date:

Info

Title:
Effects of Mercury(Hg) and Cadmiumm(Cd) Combined Pollution on the Physiological and Biochemical Indexes of Lythrum salicaria
Author(s):
ZHANG Xiu-juan1; SUN Run-sheng2; WU Chu1; XU Feng-ying3
1.College of Horticulture and Garden,Yangtze University,Jingzhou,Hubei 434025;
2.College of Garden,Nanjing Agriculture University,Nanjing,Jiangsu 21000;
3.College of Agriculture,Yangtze University,Jingzhou,Hubei 434025
Keywords:
Lythrum salicaria; mercury (Hg); cadmiumm(Cd); antioxidant enzyme systems
PACS:
S 688
DOI:
-
Abstract:
Taking Lythrum salicaria as material,the effect of different concentrations of mercury (Hg) (0,0.5,5.0 and 50.0 mg/L) and cadmium (Cd) (0,0.5,5.0 and 50.0 mg/L) on the physiological and biochemical indexes of it were studied.The results showed that low concentrations of Hg2+ and Cd2+stimulated the growth of Lythrum salicaria.With the increase of Hg2+or Cd2+concentrations,relative chlorophyll content was slightly increased but then declined.Lower concentrations of Cd2+could improve ascorbate peroxidase (APX) and superoxide dismutase (SOD) activities.But malondialdehyde (MDA) content fluctuated.CAT activity decreased with the increase of heavy metal concentration.Relative permeability of Lythrum salicaria cell membrane increased with increasing of Hg or Cd concentration.Hg2+ and Cd2+ combined pollution were heavier pollution than that of Hg2+ and Cd2+ stress.In conclusion,Lythrum salicaria could adapt to heavy metal,especially for Hg and Cd,by regulating the antioxidant system.Lythrum salicaria had potential extensive application prospects in the environmental governance and landscaping.

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Last Update: 2014-08-14