alexa Interactions between Lead on Nutrients (Ca2+, K+, N), and their Consequences on Growth in Sesuvium portulacastrum and Brassica juncea
ISSN: 2155-6199

Journal of Bioremediation & Biodegradation
Open Access

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Research Article

Interactions between Lead on Nutrients (Ca2+, K+, N), and their Consequences on Growth in Sesuvium portulacastrum and Brassica juncea

Hanen Zaier*#, Tahar Ghnaya# and Chedly Abdelly
Plants Extremophiles Laboratory, Centre of Biotechnology of Borj-Cédria, Tunisia
#These authors contributed equally
Corresponding Author : Hanen Zaier
Plants Extremophiles Laboratory
Centre of Biotechnology of Borj-Cédria, Tunisia
Tel: +216 71 430 215
Fax: +216 71 430934
E-mail: [email protected]
Received December 11, 2013; Accepted August 28, 2014; Published August 30, 2014
Citation: Zaier H, Ghnaya T, Abdelly C (2014) Interactions between Lead on Nutrients (Ca2+, K+, N), and their Consequences on Growth in Sesuvium portulacastrum and Brassica juncea. J Bioremed Biodeg 5:243. doi:10.4172/2155-6199.1000243
Copyright: © 2014 Zaier H, et al. This is an open-a ccess article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Lead is one of the most toxic metals in the environment and causes drastic morphological and physiological deformities in plants. Growth restriction, chlorosis and necrosis are usually accompanied with a large disturbance of the uptake of essential elements. The aim of this work is to study the effects of lead on mineral nutrient acquisition (Ca2+, K+, N), and their consequences on growth in two different species: halophytic (Sesuvium portulacastrum) and glycophytic (Brassica juncea). Seedlings were grown for 21 days in split-root conditions. One half of the root system was immersed in complete nutrient solution supplemented with 400 μM Pb(NO2)3, and the other half was immersed in a Pb2+-free medium, containing all nutrients or deprived of potassium or calcium or nitrogen. Using this approach, we demonstrated that lead interfere mainly with the absorption of Ca2+ by the roots, thus limiting the growth of plants and their ability to accumulate this metal. We propose that the increase of Ca2+ availability in soils could improve the growth of both species in the presence of lead. This would be essential for improving their utility for phytoremediation of this metal in contaminated soils.

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