Journal of Environmental Biology

Effect of some plant growth regulators on lindane and
alpha-endosulfan toxicity to Brassica chinensis

Author Details

Waraporn Chouychai

(Corresponding author)

Department of Science, Faculty of Science and Technology, Nakhonsawan Rajabhat University,

Nakhonsawan,60000,Thailand

e-mail : chouychai@yahoo.com

Publication Data

Paper received:

05 March 2011

Revised received:

20 August 2011

Accepted:

16 September 2011

Abstract

The effect of indolebutyric acid (IBA) and gibberellic acid (GA₃), to alleviate the organochlorine phytotoxicity were studied in Brassica chinensis. Presence of organochlorine decreased Brassica chinensis seedlings growth in contaminated alkaline soil. One mg l^-1 IBA could enhance 14 and 26% shoot and root length of B. chinensis seedlings grown at 40 mg kg^-1 lindane contaminated soil, respectively. Ten mg l^-1 IBA also increased 80 and 40% root fresh weight of seedling grown in 40 mg kg^-1 lindane and alpha-endosulfan contaminated soils, respectively. However, IBA had no effect on shoot and root length of seedlings grown in endosulfan contaminated soil. On the other hand, 10 mg l^-1 GA₃ only increased 80% of shoot and root fresh weigh of B. chinensis in 40 mg kg^{-1 ?endosulfan} contaminated soil.? External auxin addition could increase B. chinensis growth in lindane more than endosulfan contaminated soil. External gibberellin was less effective than external auxin to increase B. chinensis growth in organochlorine contaminated soil. There is possibility that auxin could decrease organochlorine phytotoxicity in plants and hence can be useful for organochlorine phytoremediation.

Key words

Auxin, Gibberellin, Endosulfan, Lindane, B. chinensis

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