BACOPA MONNIERI (L.) PENNELL –A GOOD BIOMARKER OF WATER POLLUTION/CONTAMINATION
Journal Title: Журнал ÑтреÑÑ-физиологии и биохимии - Year 2010, Vol 6, Issue 3
Abstract
Effect of water pollution on Bacopa monnieri was studied by culturing their rooted propagules in various polluted water samples and Hoagland nutrient medium artificially contaminated with different micro-level concentrations of HgC[sub]l2[/sub]. Anatomical observations of those plants showed safranin-stained masses deposited in the xylem vessels of stem. The plants treated in chemical solutions which are free from metallic ions, under threshold level of HgCl[sub]2[/sub], and control plants were devoid of such deposits. Similar deposits were observed in plants cultured in various local water samples. Atomic Absorption Spectrophotometric analyses of these water samples and the bioaccumulation property of the plant detected the presence of Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb and Zn at various levels. The occurrence of the localized stained deposits in the xylem vessels of the stem of the plants cultured in polluted/contaminated aqueous medium, eventhough the growth medium contamination is micro-levels, is indicative of high sensitivity of Bacopa monnieri plants towards water pollution irrespective of the chemical nature of the pollutants. Although these stained deposits are not specific to any individual element that causes pollution, detection of water contamination is possible by observing the safranin-stained masses in the xylem vessels of this medicinal plant.
Authors and Affiliations
K Hussain
Keywords
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