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Journal of Environmental BiologypISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP |
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Abstract - Issue Mar 2009, 29 (2) BackEffect of 2,4-Dichlorophenoxyacetic acid
on growth, protein and chlorophyll-a content of Chlorella vulgaris and Spirulina platensis
cells Saadet Demirors
Saygideger*1 and Ozlem Okkay2 1Department of Biology, Faculty of Arts and Sciences,University of (Received: May 15, 2006 ; Revised received: December
10, 2006 ; Re-revised received: January 23, 2007 ; Accepted: February 10, 2007) Abstract: In this study,
effect of different 2,4 -dichlorophenoxyacetic acid
(2,4-D) concentrations (0.0, 9.10-5, 9.10-4, 9.10-3 and 9.10-2 mM) on growth rate,
content of protein and chlorophyll-a in Chlorella vulgaris
and Spirulina platensis
cells was investigated. The most stimulatory effect on growth rate, protein and
pigment ratio of C. vulgaris and S. platensis was observed at 9.10-4 mM concentrations of
2,4-D. The results show that low concentrations of 2,4-D have hormonal effect
due to being a synthetic auxin. Cell number, protein
and pigment rates were inhibited at 9.10-2 mM concentration in
C. vulgaris. Such parameters were inhibited in S. platensis, both at 9.10-3 and 9.10-2 mM 2,4-D
concentrations. This is due to herbicidal effect of high concentrations of 2,4-D.
S. platensis was found to be more sensitive than S. vulgaris to 2,4-D applications. The use of algae as
bio-indicators in herbicide contaminated fresh water habitats, was discussed. Key words: Chlorella vulgaris, Spirulina platensis, Growth, Protein, Chlorophyll-a PDF of full length paper is available with author (saygideger@gantep.edu.tr) Copyright © 2008 Triveni Enterprises. All rights reserved. No part of the
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acceptability of the conclusions enforced or derived, rest completely with the
author(s). |