| Abstract: | Little data about toxic effect of triphenyltin (TPT) on aquatic plants is available. The purpose of this paper is to study the toxic effect of TPT on duckweed, Lemna polyrhiza, and the bioconcentration factor of TPT by Lemna polyrhiza. At 5 µg/l concentration TPT treatment, a toxic effect on growth of Lemna polyrhiza appeared. The 8 day IC50 of TPT to Lemna polyrhiza was 19.22 µg/l. TPT stimulated peroxidase activity and nitrate reductase activity at 2 and 5 µg/l. TPT reduced chloroplast activity of Lemna polyrhiza at 2 and 5 µg/l. Bioconcentration factors of TPT for Lemna polyrhiza were 4.3 and 10.9 at 2 and 5 µg/l, respectively. Copyright © 2005 John Wiley & Sons, Ltd. |
