Effect of lead stress on growth characteristics and physiological indexes of Alternanthera philoxeroides | 杩绌哄瀛垮褰卞
2011
Xiong Yong, Yunnan University of Nationalities, Kunming (China) | Zhang Zhenyu, Yunnan University of Nationalities, Kunming (China)
锛Objective锛 The paper aimed to discuss effects of different concentrations of lead stress on Alternanthera philoxeroides growth and physiological indices, to explore phytoremediation methods for removal of lead pollution. 锛Method锛 A. philoxeroides in water culture was treated with different concentration of lead, and then, its external injury was observed, its growth and physiological indexes were measured. 锛Result锛 A. philoxeroides biomass and chlorophyll content decreased; conductivity and malonaldehyde (MDA ) content were increased; the SOD, POD and CAT activities showed a trend of first increase and then decrease with increase in concentration of lead stress. 锛Conclusion锛 With increase in lead concentration, the cell membrane permeability increased and MDA had a higher accumulation, antioxidant enzymes activity decreased, the normal oxidative metabolism of A. philoxeroides was severely affected, leading it to wilt.
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