Effects of Light and Monosulfuron on Growth and Photosynthetic Pigments of Anabaena Flos-Aquae Breb
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Abstract
The effects of monosulfuron on growth and photosynthetic pigments of the nitrogen-fixing cyanobacterium Anabaena flos-aquae grown exposed to 2000-, 3000-, and 4000-lux light intensity were studied. Exposed to three light intensities, the seven concentrations of monosulfuron tested can significantly inhibit algal growth in a dose-dependent manner. The cell numbers and growth rate were decreased with the increase in mono-sulfuron concentration, and A. flos-aquae had different degrees of sensitivity to monosulfuron with the most sensitive light intensity being 4000-lux followed by 3000-lux and 2000-lux. The herbicide monosulfuron appeared to have different effects on the synthesis of photosynthetic pigments. The chlorophyll appeared to tackle monosulfuron concentrations. The caroteniod content of algae treated with 0.008 and 0.08 mg/L monosulfuron exposed to 2000-lux had a different stimulatory effect from that of treatments exposed to 3000-lux and 4000-lux, but an inhibitory effect at concentration above 0.8 mg/L. The effect of monosulfuron on biliprotein in cells of A. flos-aquae exposed three light intensities displayed contrary dose dependence.
- M. M. EL-Sheekh, H. M. Kotkat, and H. E. Hammouda, “Atrazine herbicide on growth, photosynthesis, protein synthesis, and fatty acid composition in the unicellular green algae Chlorella Kessler,” Ecotocxicol Environ Safety, Vol. 29, pp. 349–358, 1994.
- J. Y. Shen, Z. R.Lu, Y. T. Lu, and X. H. Wang, “Progress on toxicity of nitrogen-fixing cyanobacteria to herbi-cides,” World Pestic, Vol. 6, pp. 54–61, 2004.
- T. Ogawa and S. C. Aiba, “Bioenergetic analysis of mixotrophic growth in Chlorella vulgaris and Scenedes-mus acutus,” Biotechnol Bioeng, Vol. 23, pp. 1121–1132, 1981.
- Z. M. Li, G. F. Jia, and L. X. Wang, “Sulfonylurea com-pounds and its herbicide usage,” Chinese patent CNI 080 116A, 1994.
- Z. J. Fan, C. F. Qian, and H. B. Dang, “Study on the bio-assay of maiguning and safety assessment of maiguning to different maize (Zea mays L.),” Chinese Journal of Pesticide Science, Vol.2, pp. 63–70, 2000.
- C. D. S. Tomilin, “The pesticide manual” (13th Edition). The British Crop Protection Council Press, London, 2003.
- H. Abou-Waly, M. M. Abou-Setta, H. N. Nigg, and L. L. Mallory, “Growth response of freshwater algae, Ana-baena flos-aquae and Selenastrum capricornutum, to atrazine and hexazinone herbicides,” Bull Environ Con-tam Toxicol, Vol.46, pp. 223–229, 1991.
- W. A. Kratz and J. Myers, “Nutrition and growth of sev-eral blue-green algae,” American Journal of Botany, Vol. 42, pp. 282–287, 1955.
- K. K. Schrader, M. Q. Regt, P. D. Tidwell, C. S. Tucker, and S. O. Duke, “Compounds with selective toxicity to-wards the off-flavor metabolite-producing cyanobacte-rium Oscillatoria cf. chalybea,” Aquaculture, Vol. 163, pp. 85 91, 1998.
- K. K. Schrader, M. Q. Regt, P. D. Tidwell, C. S.Tucker, and S. O. Duke, “Compounds with selective toxicity to-wards the off-flavor metabolite-producing cyanobacte-rium Oscillatoria cf. chalybea,” Aquaculture, Vol. 163, pp. 85–91, 1998.
- G. Mackinney, “Absorption of light by chlorophyll solu-tions,” Journal of Biological Chemistry, Vol. 140, pp. 315–322, 1941.
- A. N. Glazer and C. S. Hixson, “Characterization of R-phycocyanin chromophore content of R-phycocyanin and C-phycoerythrin,” Journal of Biological Chemistry, Vol. 250, pp. 5487–5495, 1975.
- A. Jenssen, “Chlorophyll and carotenoids,” In: Handbook of Phycological Methods. Physiological & Biochemical Methods (Ed. By J. A. Hellebust & J. S. Craigie), Cam-bridge University Press, Cambridge, UK, pp. 59–70, 1978.