title: The influence of the earthworm Lampito mauritii (Kinberg) on the activity of selected soil enzymes in cadmium-amended soil.
abstract: The effects of cadmium (CdCl2·7H2O) on cellulase, urease, amylase, invertase and phosphatase were assessed for a period of 45 days in the presence and absence of earthworms [Lampito mauritii (Kinberg)] in alfisol soil. The activities of all enzymes significantly increased with longer incubation times (45 days) under laboratory conditions in both control and Cd-amended soils (both with and without earthworm incubation). However, the activities of all enzymes decreased with increasing Cd concentrations under laboratory conditions, both in the presence and absence of earthworms. In the presence of earthworms, cellulase, urease, invertase and amylase activities increased. However, phosphatase activity was lower in most of the Cd-amended soils in the presence of earthworms compared to its activity levels in soils lacking earthworms. These results show that earthworms modulated the stress imposed by Cd by providing suitable substrates, which in turn acted as stimulants for extracellular enzyme secretion by microbes, and by removing Cd through its accumulation in the tissues of the earthworms.
authors: Department of Bioenvironmental Energy, College of Natural Resource and Life Science, Pusan National University, Miryang, 627-706, South Korea, ssivaphd@yahoo.com.
authors: S
authors: S
authors: Sivakumar
authors: D
authors: D
authors: Prabha
authors: S
authors: S
authors: Barathi
authors: D
authors: D
authors: Nityanandi
authors: C V
authors: CV
authors: Subbhuraam
authors: T
authors: T
authors: Lakshmipriya
authors: Seralathan
authors: S
authors: Kamala-Kannan
authors: S H
authors: SH
authors: Jang
authors: P I
authors: PI
authors: Yi
mesh_terms: D000818:Animals; D001673:Biodegradation, Environmental; D002104:Cadmium / Q000633:toxicity*; D004784:Environmental Monitoring; D009835:Oligochaeta / Q000502:physiology*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis; D014510:Urease / Q000032:analysis* / Q000378:metabolism
chemical_list: D012987:Soil; D012989:Soil Pollutants; D002104:Cadmium; D014510:Urease
references: Environ Monit Assess. 2010 Aug;167(1-4):151-63
references: 19548097
references: J Environ Sci (China). 2006;18(6):1135-41
references: 17294954
references: J Hazard Mater. 2013 Nov 15;262:288-96
references: 24041821
references: Environ Monit Assess. 2012 Jan;184(1):515-26
references: 21404012
references: J Hazard Mater. 2012 Aug 15;227-228:179-84
references: 22658212
references: J Hazard Mater. 2009 Oct 15;170(1):382-8
references: 19540045
references: Environ Pollut. 1996;92(1):1-5
references: 15091404
references: Environ Pollut. 2009 Oct;157(10):2737-42
references: 19535186
references: Environ Monit Assess. 2011 Mar;174(1-4):585-95
references: 20499163
references: Water Res. 2010 Apr;44(8):2572-82
references: 20144838
references: Bioresour Technol. 2009 Sep;100(17):4041-6
references: 19362821
references: Can J Microbiol. 1975 Apr;21(4):565-70
references: 164268
references: Anal Biochem. 1989 Nov 1;182(2):197-9
references: 2610335
references: Sci Total Environ. 2012 Feb 1;416:200-7
references: 22221873