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 July 2009, 30 (4)                                     Back


Abstract _12

Antioxidative efficiency of Triticum aestivum L. exposed to chromium stress

 

Surjendu Kumar Dey, Priyanka Priyadarshani Jena and Satyajit Kundu

Department of Environmental Sciences, Fakir Mohan University, Vyasa Vihar, Balasore - 756 019, India

(Received: November 19, 2007; Revised received: April 02, 2008; Accepted: May 03, 2008)

 

Abstract: Wheat (Triticum aestivum L. cv.? Sonalika) seedlings were grown? in presence of? K2Cr2O7 (10, 50 and 100 ppm) for 7 days and growth, total chlorophyll, activities of? antioxidative enzymes like superoxide dismutase (SOD; EC 1.15.1.1), catalase (CAT; EC 1.11.1.6) and guaiacol peroxidase (POX; EC 1.11.1.7) and lipid peroxidation were determined in root and shoot tissues. Growth of the seedlings was significantly (p < 0.05) depressed and at 100 ppm, root length was reduced by 63% and shoot length by 44% in comparison to the respective controls.? Total chlorophyll loss in shoots was about 46% at 10 ppm of K2Cr2O7 which further increased to 80% at 100 ppm. Both in root and shoot tissues, activities of SOD and CAT declined with increase of metal in growth medium and it was significant (p < 0.05) even at lowest concentration of the metal tested.? But POX activity showed a different trend. In root tissues it was decreased whereas in shoots, there was many fold increase in the activity (about 370% over control at 100 ppm).? Malondialdehyde (MDA) content increased both in root and shoot tissues, but it reached significant (p < 0.05) level at 50 ppm in roots and at 100 ppm in shoot tissues.? Even though antioxidative enzyme activities were not assayed in germinating embryos, inhibition in germination percentage (by 40% at 100 ppm) and increase in lipid peroxidation level (by 71% over control at 100 ppm) were observed in 2-day-old embryos, germinated in presence of K2Cr2O7 (10, 50 and 100 ppm). The results indicated the imposition of oxidative stress situations both during germination and early stages of seedling growth by Cr6 stress, which might be one of the probable reasons behind Cr toxicity in plants.

Key words: Antioxidative enzymes, Cr6, Lipid peroxidation, Wheat ?

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

 

 

 

Copyright ? 2009 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).