Hyperaccumulative property of Solanum nigrum L. to Cd explored from cell membrane permeability,subcellular distribution,and chemical form |
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| Authors: | Shuhe Wei Xiangfeng Zeng Shanshan Wang Jiangong Zhu Dandan Ji Yunmeng Li Hongjing Jiao |
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| Institution: | 1. Key Laboratory of Pollution Ecology and Environment Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, People’s Republic of China
2. University of Chinese Academy of Sciences, Beijing, 100039, People’s Republic of China
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| Abstract: | Purpose The aim of this article was to explore the hyperaccumulative property from cell membrane permeability, subcellular distribution, and chemical form of Solanum nigrum L. to Cd compared to the nonhyperaccumulator Solanum melongena L. (cultivar name Liaoqie 3) in the same plant family. Materials and methods Soil pot culture experiment was conducted, and the cell membrane permeability, subcellular distribution, and chemical forms of Cd in S. nigrum and S. melongena were determined. Results and discussion The results showed that the tolerance of S. nigrum to Cd was higher and owned all Cd hyperaccumulator characteristics. The relative electric conductivities in root and leaf were higher of S. nigrum than S. melongena, but the malondialdehyde concentrations in former were roughly lower than that in latter. Cd concentration ratio in cell wall, NaCl extractable form, and HAc (acetic acid) extractive form were higher in root, stem, and leaf of S. nigrum. Conclusions Compared to S. melongena, stronger Cd tolerance, higher cell membrane permeability with intact cell membrane, weak Cd forms in subcellular distribution, and relative lower bioactivity speciation may be part reasons of S. nigrum hyperaccumulating Cd. |
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