Journal of Stress Physiology & Biochemistry, Vol. 9 No. 3 2013, pp. 23-36 ISSN 1997-0838
Original Text Copyright (cc) 2013 by    Abdussalam, Ratheesh Chandra, Hussain-koorimannil, Salim



ORIGINAL ARTICLE
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Response and Bioaccumulation Potential of Boerhavia diffusa L. Towards Different Heavy Metals

Abdussalam A.K.1, Ratheesh Chandra P.1, Hussain-koorimannil2 and Nabeesa Salim1*

1 Physiology and Biochemistry Division, Department of Botany, University of Calicut, Kerala, India, 673 635
2 Department of Botany, Unity Women’s College, Manjeri, Malappuram, Kerala, India, 676 122


*E-Mail: nabeesasalim@gmail.com

Received  January 19, 2013

Effect of different concentrations of heavy metals such as  Cadmium, Chromium, Mercury and Leadwas studied by cultivating rooted propagules of Boerhavia  diffusafor a period of twenty days in Hoagland nutrient medium artificially contaminated with known concentration of those heavy metal ions. Concentrations of the metals selected to impart visible symptoms of growth retardation and to permit survival for prolonged period are  30ÁM cadmium chloride (CdCl2), 400 ÁM potassium dichromate (K2Cr2O7), 10 ÁM mercuric chloride (HgCl2), and  600 ÁM lead acetate (CH3-COO)2Pb.  More or less uniform growth performance was shown by the plants irrespective of the differences of concentration of the heavy metals. However, parameters such as root - and stem length, stomatal - and tolerance index varied among the treatments. Significant differences were observed in the heavy metal accumulation potential among metals and between plant parts such as root, stem and leaf and the pattern was dependent on growth period.

Key words:    Heavy metals, Cd, Cr, Hg, Pb, bioaccumulation, B. diffusa

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