Effect of Cadmium on Growth and Antioxidant Enzyme Activities of Lantana comara L.
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    Abstract:

    In this study,a pot experiment was used to investigate the growth and antioxidant enzymes responses of Lantana comara L.under Cd treatment with different concentrations.The results showed that:(1)The dry weight of L.comara L.was increased at first and then decreased with the increasing of Cd concentrations.30 mg·kg-1 Cd treatment can promote the growth of L.comara L.,but when the Cd concentration was higher than 60 mg·kg-1,the growth of L.comara L.was inhibited significantly.(2)O2 production rate,H2O2 and MDA contents,and electrolyte leakage rate in leaves and roots of L.comara L.were enhanced by gradually increasing of Cd concentration and stress time.After 90 days of Cd stress,O2 production rate,H2O2 and MDA contents,and electrolyte leakage rate in leaves and roots were significantly lower than those of control when the Cd concentration higher than 60 and 30 mg·kg-1,respectively.The activities of antioxidant enzymes such as SOD,POD,APX and CAT in roots and leaves of L.comara L.had a decline trend after an initial ascent with increasing of Cd concentration,and which were significantly lower than those of control when the Cd concentration higher than 90 and 60 mg·kg-1,respectively.The above results revealed that low concentration of Cd treatment can promote the growth of L.comara L.,and the growth of L.comara L.was inhibited significantly under high concentration of Cd treatment.(3)High concentrations of Cd treatment significantly reduced the activities of antioxidant enzymes in L.comara L.,leading to accumulate mass of reactive oxygen species,induced severe membrane lipid peroxidation damage,thus the growth of L.comara L.was significantly inhibited.

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JIA Yongxia, ZHANG Shirong, ZHANG Chunmei, HUANG Tianyang, HU Xin, FANG Jiyu. Effect of Cadmium on Growth and Antioxidant Enzyme Activities of Lantana comara L.[J]. Acta Botanica Boreali-Occidentalia Sinica,2013,33(9):1838-1844

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  • Online: October 09,2013
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