Samples leaves and roots were homogenized in 0. Nutrient solution was changed twice a week. Lead accumulation in plants increases with an increase in the exogenous lead level. Different concentrations of Pb NO3 2 solutions 0, 1. These symptoms can be essentially attributed to a deficiency of macroelements especially K, P, Ca and Mgwhich results from an inhibition of their uptake under Pb exposure see below.
Plant growth and lead treatment A variety of wheat Triticum aestivum L. Lead is not amongst the essential elements for plants, but they absorb this metal if it is present in their environment, especially in rural areas where the soil is polluted by automotive exhaust and in fields contaminated with fertilizers which contain heavy metals as impurities Adriano, To investigate lead effects on nutrient uptake and metabolism, two plant species, spinach Spinacia oleracea and wheat Triticum aestivumwere grown under hydroponic conditions and stressed with lead nitrate, Pb NO3 2, at three concentrations 1.
This article has been cited by other articles in PMC. Table 1 Effect of Pb on mineral ion uptake by wheat and spinach.
In the present study, we have investigated the effects of lead stress on mineral content Na, K, Ca, P, Mg, Fe, Cu, Zn and Mnand its consequences on biomass, chlorophyll, soluble proteins and proline contents in leaves and roots of spinach and wheat. Conversely, increased provision of certain inorganic salts can antagonize lead effects to some extent Javis and Leung, It has become a major environmental contaminant following rapid industrialization and urbanization.
One-way analysis of variance ANOVA was carried out using post hoc multiple comparison from the Tukey test to determine the difference between the levels of Pb-stress in each studied parameter a significance level of 0. Despite the importance of lead contamination in North Africa, it remains unclear as to which economical species are able to resist Pb-stress.
The seeds were then germinated in Petri dishes containing two sheets of Whatman no. The relative lead uptake by spinach and wheat, and the different susceptibility of these two species to lead treatment are discussed.
Results and discussion 3.
Production and Hosting by Elsevier B. Materials and methods 2. Wheat and spinach are two important agricultural species, so it appeared to be of interest to compare the effects of lead exposure on these two species. According to the US Environmental Protection Agency, lead is one of the most common heavy metal contaminants in aquatic and terrestrial ecosystems and can have adverse effects on the growth and metabolism of plants, owing to its direct release into the atmosphere Watanabe, Effect of lead on plant growth Lead exposure results in a dose-dependent damage to both plant species.
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