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Protection of tomato seed germination from the inhibitory effect of 2,4,5-trichlorophenoxyacetic acid by inoculation of soil with Burkholderia cepacia AC1100.

Gangadhara, K. P. and Kunhi, A. A. M. (2000) Protection of tomato seed germination from the inhibitory effect of 2,4,5-trichlorophenoxyacetic acid by inoculation of soil with Burkholderia cepacia AC1100. Journal of Agricultural and Food Chemistry, 48 (9). pp. 4314-9. ISSN 0021-8561

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Abstract

The effect of 2,4,5-trichlorophenoxy acetic acid (2,4,5-T) on the germination and seedling vigor of different crop seeds was tested. Seeds of rice, maize, sorghum, finger millet, and horse gram were comparatively more tolerant to the chemical with no marked effect up to a concentration of 200 mg 2,4,5-T L(-)(1) as tested by the filter paper method. Tomato and brinjal (egg plant) were highly susceptible. Even at 5 and 10 mg 2,4,5-T L(-)(1), marked reduction in the germination and seedling vigor of tomato and egg plant, respectively, was observed. At 20 and 30 mg L(-)(1), the germination of tomato and egg plant seeds, respectively, were completely inhibited on filter paper, whereas the inhibitory concentrations in soil was 40 mg 2,4,5-T kg(-)(1) soil. Several abnormalities were observed in the chemically affected seedlings. Protease activity of the seeds germinating in the presence of the chemical was drastically reduced. Bioremediation of the chemically contaminated soil with Burkholderia cepacia AC1100, by inoculation of the soil 7 days before sowing the seeds, completely protected the seeds, resulting in normal germination and an improved seedling vigor.

Item Type: Article
Uncontrolled Keywords: 2,4,5-Trichlorophenoxy acetic acid; seed germination; inhibition; seedling vigor; Burkholderia cepacia AC1100; soil bioremediation
Subjects: 500 Natural Sciences and Mathematics > 05 Earth Sciences > 02 Soil Sciences
Divisions: Food Microbiology
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 19 Jul 2011 04:38
Last Modified: 28 Sep 2018 11:02
URI: http://ir.cftri.com/id/eprint/2150

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