Role of reduced glutathione in Zn and Cd hyperaccumulation in Sedum alfredii H
Hyperaccumulating ecotype of Sedum alfredii H. was treated with 1000 μmol·L<sup>-1</sup> Zn(NO<sub>3</sub>)<sub>2</sub> or 200 μmol·L<sup>-1</sup> CdCl<sub>2</sub> for 25 days. Zn and Cd concentrations in plants, total sulphur (S) and reduc...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2007-11-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/1008-9209.2007.06.0597 |
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| Summary: | Hyperaccumulating ecotype of Sedum alfredii H. was treated with 1000 μmol·L<sup>-1</sup> Zn(NO<sub>3</sub>)<sub>2</sub> or 200 μmol·L<sup>-1</sup> CdCl<sub>2</sub> for 25 days. Zn and Cd concentrations in plants, total sulphur (S) and reduced glutathione (GSH) in shoots, were detected every 5 days after treatment. Effects of S on Zn/Cd accumulation in Sedum alfredii H. were also investigated. The results indicate that Zn/Cd concentration in shoots of Sedum alfredii H. increased linearly within 15 days and after that increasing rate was declined considerably. Concentrations of total S and GSH in shoots were also increased within 15 days, and then decreased. Zn concentration in roots was found to be positively correlated with total S or GSH concentration in shoots, however, there is no such relationship with accumulation of Cd in the presence of S and GSH. These results suggest that SH-containing ligands is not the main chelator of Zn/Cd in the hyperaccumulating ecotype of Sedum alfredii H. GSH probably plays an important role in the detoxification of dissociated zinc/cadmium, while increasing S supplying level could increase zinc and cadmium accumulation of Sedum alfredii H. significantly. |
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| ISSN: | 1008-9209 2097-5155 |