Response of Vetiveria zizanioides to Pb2+ stress

Abstract

Abstract: The study on the eco-physiological indices of V.zizanioides under Pb²⁺ stress showed that with the increase of Pb²⁺ concentration(0～8 mmol·L^-1) in water culture,the growth of V.zizanioides seedlings was badly influenced.Their leaves'conductivity increased,while SOD activity increased first and decreased then,but still higher than control.There was a positive correlation between SOD activity and Pb²⁺ concentration.POD and CAT activities were also increased first and decreased then,but when the Pb²⁺ concentration was>4 mmol·L^-1,these enzyme activities were lower than the control,and had a significantly negative correlation with Pb²⁺ concentration.It was considered that the increase of enzyme activities was resulted from the adaptability of V.zizanioides stressed by Pb²⁺,while high concentration Pb²⁺ had an inhibitory effect on enzyme activities.

Key words: Vetiveria zizanioides, Aseptic seedlings, Pb²⁺ stress

CLC Number:

Q945.78

HAN Lu, ZHANG Xiaoping, LIU Birong . Response of Vetiveria zizanioides to Pb²⁺ stress[J]. Chinese Journal of Applied Ecology, 2005, 16(11): 2178-2181.

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Response of Vetiveria zizanioides to Pb²⁺ stress

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