Research Journal of Environmental Sciences1819-34122151-8238Academic Journals Inc.10.3923/rjes.2018.160.165Lemna polyrhiza L.]]>UnadkatKrupa ParikhPunita 42018124Background and Objective: Aquatic plant species are widely used in water purification systems since long and many of them are used as scavengers of heavy metal ions from aquatic metal contaminated environments which significantly influence their growth and activity. The objective of the study was to evaluate the effect of various concentrations of cadmium (Cd) metal ion on biochemical (total chlorophyll, total carbohydrates, total proteins), stress parameters, catalase and guaiacol peroxidase and cadmium metal accumulation capability of Lemna polyrhiza L. after exposing the plant to select experimental concentrations and periods. Materials and Methods: In this study, Lemna polyrhiza L. were experimentally cultured in Hoaglands medium supplemented with various Cd ion concentrations 0.1, 0.2, 0.3, 0.4 and 0.5 ppm along with one control for 2, 4 and 6 days of exposure period. The test plants were separately harvested after 2, 4 and 6 days and chlorophyll, protein and carbohydrates were estimated. Biochemical parameters namely chlorophyll, total carbohydrate and total protein as well as stress parameters such as proline and antioxidative enzymes were carried out using standard methods. Data were analyzed using SPSS. Results: The toxicity symptoms of Cd ions morphologically showed chlorosis on the leaves of the test plants after 6 days. The results revealed that increased metal ion concentration as well as the exposure period gradually reduced chlorophylls, carbohydrate and protein contents, while proline and antioxidative enzymes gradually increased. Conclusion: Cd treated plants of Lemna polyrrhiza L. showed decreased level of chlorophyll, carbohydrates and protein and increased in proline and antioxidative enzymes i.e., catalase and guaiacol peroxidase. Also, the plant was identified as hyperaccumulator of cadmium ion.]]>Griffith, J.F., S.B. Weisberg and C.D. McGee,20031141151Yigit, S. and A. Altindag,200627475478Forstner, U. and G.T.W. Wittmann,1979Pages: 486Pages: 486Mazen, A.,200321140147Ladygin, V.G. and G.A. Semenova,2003Pisum sativum L. under conditions of root hypoxia and iron deficiency.]]>45780795An, Y.J., Y.M. Kim, T.I. Kwon and S.W. Jeong,2004Cucumis sativus growth and bioaccumulation.]]>3268593Cobbett, C.S.,2000123825832Astolfi, T., S. Zuchi and C. Passera,2005+ATPase activity of plasma membrane vesicles isolated from roots of different S-supplied maize (Zea mays L.) plant.]]>169361368Sridhar, B.B.M., F.X. Han, S.V. Diehl, D.L. Monts and Y. Su,2007191522Hoagland, D.R. and D.I. Arnon, 1938C347139Arnon, D.I.,1949Beta vulgaris.]]>24115Sadasivam, S. and A. Manikam,19912nd Edn.,Bennet, R.J., C.M. Breen and M.V. Fey,1987Zea mays L.]]>2791104Punz, W.F. and H. Sieghardt,1993338598Hegedus, A., S. Erdei and G. Horvath,20012O2 detoxifying enzymes in green and greening barley seedlings under cadmium stress.]]>16010851093Thimmaiah, S.K.,1999Siedlecka, A. and Z. Krupa,1996Phaseolus vulgaris.]]>32833841Prokopiev, E.,1978Pages: 208, (In Bulgarian)Pages: 208, (In Bulgarian)Stiborova, M., M. Ditrichova and A. Brezinova,198729453467Singh, S. and S. Sinha,2005Brassica Juncea (L.) Czern. (cv. Rohini) grown on various amendments of tannery waste.]]>62118127Dhir, B., P. Sharmila and P.P. Saradhi,200466141147Zengin, F.K. and O. Munzuroglu,2006++) on metabolism of sunflower (Helianthus annuus L.) seedlings.]]>56224229Schutzendubel, A. and A. Polle,20025313511365Rout, N.P. and B.P. Show, 2001160415423