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
    Author Resources
    Fees and Payments
    Track Paper Status
 

Google Search the Journal web-site:


    Abstract - Issue Mar 2009, 30 (3)                                     Back


Interactions between marine facultative epiphyte Chlamydomonas sp

Cadmium induced changes on proline, antioxidant enzymes, nitrate and nitrite reductases in Arachis hypogaea L.

 

N. Dinakar1, P.C. Nagajyothi1, S. Suresh1, T. Damodharam*1 and C. Suresh2

1Department of Environmental Sciences, College of Mathematical and Physical Sciences,

Sri Venkateswara University, Tirupati - 517 502, India

2Department of Biochemistry, National Institute of Nutrition, Hyderabad - 500 007, India

(Received: June 15, 2007; Revised received: September 21, 2007; Accepted: November 07, 2007)

Abstract: The groundnut , Arachis hypogaea seedlings, when grown in pot cultures for 10?25 days at 25, 50, 100 ?M CdCl2? , showed a marked decline in growth compared to control. Similar trend was observed for nitrate reductase (NR) and nitrite reductase (NiR) activities whereas proline, peroxidase (POD) and catalase (CAT) showed increasing trend when observed on the 10th day of the experiment. Changes have occurred in the physiological and biochemical activities which are observed even at low Cd levels (25 ?M). At 100 ?M concentration, with increase in experimental days, Cd has imposed drastic decrease in leaf and stem respectively, where nitrate reductase has varied from 20.87 ? 79.41 and 29.11 ? 72.91 % and nitrite reductase 21.66 ? 79.41 and 43.58 ? 75.92% respectively. Contrastingly Cd treated plant tissues showed an increase in proline 111.2 ? 159.87 % (percentage changes) and 131.23 ? 212.16 % for leaves and stems respectively, In addition cadmium caused significant changes in the activity of antioxidative enzymes, peroxidase? 48.12 ? 72.19 % in leaf and 37.71 ? 75.25 % in stem and catalase? 64.86 ? 143.92 % in leaf and? 129.13 ? 214.74 % in stem as compared to control. The study concludes that the activities of NR, NiR, proline, POD, CAT are inhibited suggesting that Arachis hypogaea seedlings are under Cd stress affecting their growth.

Key words: Cadmium stress, Growth, Proline, Antioxidant enzyme activities

PDF of full length paper is available with author (*thotidamodharam@yahoo.co.in)

 

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).