The Accumulation Characteristics of Cd and Mineral Nutrition Element in Zoysia japonica under Cd2+ Treatment

LIU Jun-xiang; SUN Zhen-yuan; QIAN Yong-qiang; JU Guan-sheng; HAN Lei; ZHOU Xiao-xing

The accumulation characteristics of Cd and the effects of Cd2+ on mineral metabolism in Zoysia japonica were studied by hydroponic culture. In the leaves and roots, the proportion of Cd in cell wall was higher than that in cytosol, and the proportion of Cd in organelle was the lowest. Whereas in the stem of Z. japonica, the proportion of Cd in cytosol was higher than that in cell wall when the concentration of Cd2+ was low (1 mg·L-1 and 10 mg·L-1), the case was opposite when the concentration of Cd2+ reached 100 mg·L-1. The concentration of Cd in underground was significantly higher than that in aboveground when the concentration of Cd2+ was low (1 mg·L-1 and 10 mg·L-1). However, when the concentration reached 100 mg·L-1, the concentration of Cd in aboveground was significantly increased by 37.31% compared with that in underground, and the transferring index was significantly increased by 4.12 and 2.45 times compared with 1 mg·L-1 and 10 mg·L-1. In underground part, the N, K, Ca and Mg contents decreased, while the P and S contents increased. In aboveground part, the contents of P, K and S decreased, and the contents of N, Ca and Mg increased.

1. Research Institute of Forestry of Chinese Academy of Forestry,Key Laboratory of Tree Breeding and Cultivation,State Forestry Administration, State Key Laboratory of Tree Genetics and Breeding,Chinese Academy of Forestry, Beijing 100091, China

Received Date: 2010-10-25

Available Online: 2012-02-16

Abstract: The accumulation characteristics of Cd and the effects of Cd2+ on mineral metabolism in Zoysia japonica were studied by hydroponic culture. In the leaves and roots, the proportion of Cd in cell wall was higher than that in cytosol, and the proportion of Cd in organelle was the lowest. Whereas in the stem of Z. japonica, the proportion of Cd in cytosol was higher than that in cell wall when the concentration of Cd2+ was low (1 mg·L-1 and 10 mg·L-1), the case was opposite when the concentration of Cd2+ reached 100 mg·L-1. The concentration of Cd in underground was significantly higher than that in aboveground when the concentration of Cd2+ was low (1 mg·L-1 and 10 mg·L-1). However, when the concentration reached 100 mg·L-1, the concentration of Cd in aboveground was significantly increased by 37.31% compared with that in underground, and the transferring index was significantly increased by 4.12 and 2.45 times compared with 1 mg·L-1 and 10 mg·L-1. In underground part, the N, K, Ca and Mg contents decreased, while the P and S contents increased. In aboveground part, the contents of P, K and S decreased, and the contents of N, Ca and Mg increased.

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Reference (21)

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The Accumulation Characteristics of Cd and Mineral Nutrition Element in Zoysia japonica under Cd2+ Treatment

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