JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Editorial Board
    Reviewer Panel
    RnD Division
    Subscription Info
    Contact Journal
 
Read Journal
    Current Issue
    Journal Archives
 
For Authors
    Authoring Guidelines
    Publication Process
    Track Paper Status
 

Search the Journal web-site through Google:


        Abstract - Issue May 2012, 33 (3)                                                                                                             Back



nstantaneous and historical temperature effects on a-pinene

Studies on phyto-genotoxic assessment of tannery effluent and

chromium on Allium cepa

 

Author Details

 

Kiran Gupta

(Corresponding author)

Plant Genetic Unit, Botany Department,? Lucknow University,? Lucknow- 226007, India

e-mail : kiran.gpta@rediffmail.com

Sumati Gaumat

Plant Genetic Unit, Botany Department, Lucknow University,? Lucknow-226007, India

Kumkum Mishra

Plant Genetic Unit, Botany Department, Lucknow University,? Lucknow-226007, India

 

 

Publication Data

Paper received:

11? June 2011

 

Revised received:

05? September 2011

 

Accepted:

04 October 2011

 

Abstract

Tannery effluent contributes significantly to pollution of the environment. In this study, phytotoxic and genotoxic effects of tannery effluent and chromium (Cr) were investigated in Allium cepa. For this purpose, tannery effluent was collected from ?Up flow Anaerobic Sludge Blanket? (U.A.S.B) Jajmau, Kanpur. A. cepa were exposed to various concentrations of tannery effluent (0.0, 3.125, 6.25, 12.50, 25.0%) and Cr (0.0, 1.0, 2.0, 4.0, 8.0 mg l-1) for 48 and 168 hr. The perusal of data revealed that the physico-chemical characteristics of tannery effluent viz. pH (8.5), EC (11.94 dSm-1), BOD (499 mg l-1), COD (1382 mgl-1) and Cr content (2.32 mg l-1) were much higher than the prescribed permissible limit for industrial effluent discharged into inland waters. These substances provoked phytotoxic and genotoxic effects in A. cepa. Total chlorophyll and protein content in leaves of tannery effluent and Cr treated plants decreased significantly in dose-duration dependent manner. A maximum decrease of 86.29 and 84.26% in total chlorophyll and 81.27 and 76.16% in protein content was observed after 168 hr of exposure while carotenoid content increased up to 6.25% effluent and 2.0 mgl-1Cr treatment and decreased further. In all treated plants, a significant (p>0.05) reduction in root length, mitotic index (MI) and induction in chromosomal (CA)/mitotic (MA) aberration and micronuclei (MNC) were observed as compared to unstressed plants. A maximum reduction of 81.15 and 79.71% in MI, and induction of 6.8 and 4.8% in CA, 29.24 and 26.66% in MA and 0.52 and 0.43% in MNC were found at 12.50% effluent and 4 mgl-1 Cr treated plants as compared to unstressed plants, however at highest effluent and Cr concentration both the plants showed pyknosis condition after 168 hr. ??

 

Key words

Genotoxicity, Tannery effluent, Allium cepa, Chromosomal aberrations?

 

Copyright ? 2012 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).