Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2007.127.131MalekzadehParviz KharaJalil FarshianShadi Jamal-AbadA`zam Khalighi RahmatzadehSamaneh 12007101In acid soils worldwide cadmium toxicity is a major factor limiting plant growth. The harmful effect of cadmium is initially expressed as a reduction in growth followed by several other secondary responses. In this study, some of the toxic effects of Cd+2 like induction of oxidative stress were investigated. The effect of metal ion on the root growth was considered in maize plants. Maize (Zea mays L.) seeds were sterilized with 2.5% sodium hypochlorite solution for 15 min and washed thoroughly with distilled water. These seeds then germinated in petri dish (20 cm) containing distilled water at 37°C in the dark. After a 1 day incubation, uniformly germinated seeds were selected and transferred to Petri dishes (9.0 cm) containing filter paper moistened with 10 mL of distilled water. Each Petri dish contained 12 germinated seeds. Each treatment was replicated 4 times. The germinated seeds were allowed to grow at 27°C in darkness and 5 mL of test solution was added to each Petri dish in the second day. The test solution contained 0, 0.25, 0.5, 0.75, 1, 3 and 5 mM CdCl2. Cadmium treatments, increased GPX and APX activities in root in the presence of 0.25, 0.5, 0.75 mM concentrations, but their activities were constant in 1, 3 and 5 mM. Increased concentrations of CdCl2 from 0.25 to 5 mM decreased root length progressively. However, no reduction of shoot length by CdCl2 was observed.]]>Allen, R.D.,199510710491054Asada, K.,199285235241Metwally, A., I. Finkemeier, M. Georgi and K.J. Dietz,2003132272281Balestrasse, K.B., L. Gardey, S.M. Gallego and M.L. Tomaro,200128497504Balestrasse, K.B., S.M. Gallego and Tomaro,2004Glycine max L.) plants.]]>262373381Blinda, A., B. Koch, S. Ramanjulu and K.J. Dietz,199720969981Brune, A. and K.J. Dietz,199518853868Chang, C.J. and C.M. Kao,19982O2 metabolism during senescence of rice leaves: Changes in enzyme activities in light and darkness.]]>251115Chen, B. and A.C. Maehly,19591959pp: 357-425pp: 357-425Chen, G.X. and K. Asada,198930987998Chongpraditrum, P., S. Mori and M. Chino,199233239244Dietz, K.J., U. Kramer and M. Baier,19991999pp: 73-97pp: 73-97Elstner, E.F. and A. Heupel,1976Armoracia lapathifolia Gilib.).]]>130175180Fernandes, J.C. and F.S. Henriques,199157246273Fornazier, R.F., R.R. Ferreira, A.P. Vitoria, S.M.G. Molina, P.J. Lea and R.A. Azevedo,2002459197Foyer, C.H. and B. Halliwell,19761332125Fry, S.C., 198637165186Gallego, S.M., M.P. Benavides and M.L. Tomaro,1996121151159Gonzalez, A., V. Koren'Kov and G.J. Wagner,1999106203209Hendry, G.A.F., A.J. Baker and C.F. Ewart,1992Holcus lanatus L.]]>41271281Hohl, M., H. Greinev and P. Schopfer,19952O2-dependent cell wall stiffening.]]>94491498Karataglis, S., M. Moustakas and L. Symeonidis,19913339Mazhoudi, S., A. Chaoui, M.H. Ghorbal and E. El Ferjani,1997Lycopersicum esculentum, Mill).]]>127129137McGrath, S., E. Lombi and F.J. Zhao,200114923Pinto, A.P., A.M. Mota, A. De Varennes and F.C. Pinto,2004326239247Rama, D.S. and M.N.V. Prasad,1998Ceratophyllum demersum L. (Coontail), a free floating macrophyte: Response of antioxidant enzymes and antioxidants.]]>138157165Salin, M.L.,198872681689Sandalio, L.M., H.C. Dalurzo, M. Gomez, M.C. Romero-Puertas and L.A. del Rio,20015221152126Di Toppi, L.S. and R. Gabbrielli,199941105130Schopfer, P.,1996in vitro in maize coleoptiles.]]>1994349Sgherri, C.L.M., A.M.T. Milone, H. Clijsters and F. Navari-Izzo,200115814391447Shaw, B.P.,1995Phaseolus aureus.]]>37587596Smith, I.K., T.L. Vierheller and C.A. Thorne,198977449456Somashekaraiah, B.V., K. Padmaja and A.R.K. Prasad,1992Phaseolus vulgaris): Involvement of lipid peroxides in chlorophyll degradation.]]>858589Upadhyaya, A., D. Sankhla, T.D. Davies, N. Sankhla and B.N. Smith,1985121453461Weckx, J.E.J. and H.M.M. Clijsters,1996Phaseolus vulgaris as a result of root assimilation of toxic amounts of copper.]]>96506512Cho, U.H. and N.H. Seo,2005Arabidopsis thaliana exposed to cadmium is due to hydrogen peroxide accumulation.]]>168113120