Lead toxicity in Brassica pekinensis Rupr.: effect on nitrate assimilation and growth

Environmental Toxicology
Zhi-Ting XiongMin-jing Li

Abstract

Lead is a major heavy-metal contaminant in the environment that has various anthropogenic and natural sources. To study the phytotoxic effects of Pb on the popular vegetable Chinese cabbage (Brassica pekinensis Rupr.) via depression of nitrogen assimilation, pot culture experiments with three concentrations of treatment with Pb (0, 4, and 8 mmol/kg dry soil) were carried out. Our results demonstrated adverse effects of Pb on nitrogen assimilation and plant growth. The addition of Pb in the soil resulted in elevated accumulation of Pb in the shoots of the plants: Pb concentrations of 14.3, 202.3, and 418.2 mg/kg (DW) in the shoots were detected with the 0, 4, and 8 mmol/kg treatments, respectively. Compared to the control, Pb exposure (4 and 8 mmol/kg) significantly decreased shoot nitrate content (71% and 80% of the control), nitrate reductase activity (104% and 49% of the control), and free amino acid content (81% and 82% of the control), indicating decreased nitrogen assimilation in the plants. The effect of Pb also was shown by the progressive decline in shoot biomass with increasing Pb concentration in plant shoots and in the soil. However, at the treatment levels used in this study, lead did not induce visible toxic sympto...Continue Reading

References

Jun 1, 1996·Bulletin of Environmental Contamination and Toxicology·M G Miranda, K Ilangovan
Apr 30, 1997·The Science of the Total Environment·M J Wang
Jun 1, 1997·Chemosphere·R P SinghH S Srivastava
Feb 21, 1998·Bulletin of Environmental Contamination and Toxicology·Z T Xiong
Feb 17, 1999·Proceedings of the National Academy of Sciences of the United States of America·C R FrinkJ H Ausubel
Mar 6, 1999·Current Opinion in Plant Biology·F Daniel-VedeleM Caboche
Jun 22, 1999·Current Opinion in Plant Biology·M Stitt
Aug 26, 1999·Trends in Biotechnology·R E Hirsch, M R Sussman
Apr 5, 2000·Biochimica Et Biophysica Acta·B G Forde
Jun 27, 2003·The Science of the Total Environment·F A NicholsonB J Chambers
Mar 12, 2004·Annual Review of Plant Physiology and Plant Molecular Biology·Wilbur H. Campbell
Apr 20, 2004·Environmental Pollution·J PichtelH T Sawyerr
Mar 29, 2005·Environmental Toxicology·Zhi-Ting Xiong, Hai Wang

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Citations

Jan 30, 2010·Archives of Environmental Contamination and Toxicology·Dane T LambRavi Naidu
Oct 4, 2015·Environmental Science and Pollution Research International·Umair AshrafXiangru Tang
Mar 4, 2014·Ecotoxicology and Environmental Safety·B AliW J Zhou
Mar 29, 2020·International Journal of Environmental Research and Public Health·Amit KumarKrishna K Yadav
Mar 19, 2020·International Journal of Molecular Sciences·Krzysztof M TokarzStanisław Mazur
May 8, 2018·Environmental Science and Pollution Research International·Barbara PiwowarczykEwa Hanus-Fajerska
Aug 28, 2020·International Journal of Phytoremediation·Manuel A González-VillalobosFrancisca O Plascencia-Escalante
Jul 24, 2020·Scientific Reports·Muhammad Zafar-Ul-HyeSubhan Danish
Oct 13, 2020·International Journal of Phytoremediation·Ritu ChaturvediManoj S Paul
Sep 24, 2019·Journal of Environmental Management·Usman ZulfiqarMuhammad Zohaib Anjum

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