JEB logo

Journal of Environmental Biology

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

About Journal
    Home
    Obituary: Dr. R. C. Dalela
    Editorial Board
    Reviewer Panel
    Publication Policies
    Guidelines for Editors
    Guidelines for Reviewers
    Abstracting and Indexing
    Subscription and Payments
    Contact Journal
    About Triveni Enterprises
 
Read Journal
    Current Issue
    Journal Archives
 
For Authors
    Guidelines for Authors
    Terms and Conditions
    Fees and Payments
    Track Paper Status
 

Google Search the Journal web-site:


    Abstract - Issue Sep 2010, 31 (5)                                     Back


abstract_01

Impact of rhizobacteria on growth and chromium accumulation in

Scirpus lacustris L. grown under chromium supplementation

 

N.K. Singh1, U.N. Rai*1, M. Singh2 and R.D. Tripathi1

1Ecotoxicology and Bioremediation Group, National Botanical Research Institute, Lucknow - 226 001, India

 

2Department of Botany, Lucknow University, Lucknow - 226 007, India

(Received: May 14, 2009; Revised received: October 20, 2009; Accepted: January 05, 2010)

 

Abstract: Four chromate tolerant rhizobacterial strains viz., RZB-01, RZB-02, RZB-03 and RZB-04 were isolated from rhizosphere of Scirpus lacustris collected from Cr-contaminated area. These strains characterized at morphological and biochemical levels. The most efficient chromate tolerant strain RZB-03 was inoculated to fresh plant of S. lacustris and grown in 2 mg ml-1 and 5 mg ml-1 of Cr+6 supplemented nutrient solution under controlled laboratory condition. The effects of rhizobacterial inoculation on growth and chromium accumulation in S. lacustris were evaluated. The inoculation of rhizobacteria increased biomass by 59 and 104%, while total chlorophyll content by 1.76 and 15.3% and protein content increased by 23 and 138% under 2 mg ml-1 and 5 mg ml-1 concentrations of Cr+6, respectively after 14 d as compared to non-inoculated plant. Similarly, the Cr accumulation also increased by 97 and 75% in shoot and 114 and 68% in root of inoculated plants as compared to non inoculated plants at 2 mg ml-1 and 5 mg ml-1 Cr+6 concentrations, respectively, after 14 d. The chromate tolerant rhizobacteria which play an important role in chromium uptake and growth promotion in plant may be useful in development of microbes assisted phytoremediation system for decontamination of chromium polluted sites.

Key words: Rhizobacterial strains, Hexavalent chromium (Cr+6), Phytoremediation, Tolerance, Tannery sludge,? Rhizosphere

??????? PDF of full length paper is available online

 

Copyright ? 2010 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).