Heavy metal accumulation potential and medicinal property of Bacopa monnieri - a paradox
Journal Title: Журнал ÑтреÑÑ-физиологии и биохимии - Year 2011, Vol 7, Issue 4
Abstract
Bioaccumulation of Mercury and Cadmium in Bacopa monnieri (L.) Pennell, cultivated in Hoagland medium artificially contaminated with micro quantities of HgCl[sub]2[/sub] and CdCl[sub]2[/sub] is investigated. Bioaccumulation potential of [i]B. monnieri[/i] is more towards Cd than Hg. Absorption and translocation of Hg and Cd are proportional to the availability of the metal in the growth media and period of growth. Effect of acidic pH showed enhanced accumulation while basic pH resulted in significant reduction in the accumulation of Hg and exorbitant reduction of Cd. As a result of combined treatment of HgCl[sub]2[/sub] and CdCl[sub]2[/sub], accumulation was very low in both acidic and basic pH. In addition to pH, antagonistic effect of Ca[sup]2+[/sup] present in lime water which was added to raise the pH of the growth medium also controls the accumulation and absorption of Hg and Cd ions. Bioaccumulation of Hg and Cd in [i]B. monnieri[/i] reveals the phytoremediation potential while the bioaccumulation is hazards to health since the plant is highly medicinal and one important ingredient of many Ayurvedic preparations.
Authors and Affiliations
K Hussain, A Abdussalam, P Ratheesh Chandra , Nabeesa Salim
Keywords
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