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Heavy metal levels and esterase variations between metal-exposed and unexposed duckweed Lemna minor: field and laboratory studies.

Abstract：

:Environmental homogeneity is being continuously disturbed and affected by artificially introduced loads of chemical toxicants that also include heavy metals. The Tiljala wetlands of the eastern fringe of Calcutta, West Bengal (India) are a virtual sink for the deposition of urban and industrial wastes that get admixed with the aquatic environment. We have selected Lemna minor (duckweed), as a representative of the biota surviving therein for the present study. Concentrations of lead, cadmium, chromium, zinc, copper and mercury in the fronds of Lemna were measured to peep into the range of input of heavy metals in the duckweed subjects. Natural unexposed population of duckweed from a domestic pond in Batanagar area, 24 Parganas, West Bengal (India) was also found to accumulate similar concentrations of these metals when cultured in artificially contaminated water in the laboratory. The exposed individuals also exhibited polymorphism with respect to the loci of esterase, as compared to an unexposed control plants. Therefore, the present study suggests EST variations of L. minor to be a potential biomarker of heavy metal pollution.

journal_name

Environ Int

journal_title

Environment international

authors

Mukherjee S,Mukherjee S,Bhattacharyya P,Duttagupta AK

doi

10.1016/j.envint.2004.01.006

subject

Has Abstract

pub_date

2004-08-01 00:00:00

pages

811-4

issue

6

eissn

0160-4120

issn

1873-6750

pii

S0160-4120(04)00031-5

journal_volume

30

pub_type

杂志文章

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