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| Content Provider | Springer Nature Link |
|---|---|
| Author | Shao, Shuxun Deng, Guodong Mi, Xiubo Long, Shengqiao Zhang, Jing Tang, Jun |
| Copyright Year | 2014 |
| Abstract | A naturally selenium-accumulating Cardamine sp. is growing in Yutangba Selenium Mining Field, Enshi area, Hubei Province, China, where the geochemical environment is selenium-enriched and endemic selenosis ever occurred in humans. The present study investigated the characteristics of accumulation, speciation and quantity of selenium in Cardamine sp. with HPLC-ICP-MS. Results show that Cardamine sp. can accumulate Se at most 1427 mg/kg in seedling leaves. Even after the biomass incensement of growing up, the plant still could accumulate Se up to several hundred of mg/kg in concentration. Moreover, the biomass enrichment coefficient (BEC) of Se is exceedingly high, in the seedling leaves mostly, higher than 50 mg/kg; in the range of 43.7–68 mg/kg; and the lowest value is higher than 3 mg/kg in mature fronds. Se is present in the plant predominantly in form of SeCys$_{2}$ with the highest concentration in seeds; up to 1081 mg/kg as Se. In contrast, SeCys$_{2}$ levels are low during early growth period; they are 136.1 mg/kg as Se in seedling fronds and 39.4 mg/kg as Se in mature fronds, respectively. SeMet concentration is comparatively low; 10.6 mg/kg as Se in seedling frond and 5.3 mg/kg as Se in half mature fronds, respectively. This indicates that Cardamine sp. is extremely efficient in extracting Se from soil and translocating it into its above-ground biomass. Therefore, Cardamine sp., found in Yutangba Se Mining Field may be a new Se hyperaccumulator. It is still uncertain whether the Se-accumulation or detoxification of Cardamine sp. happens through the pathway of SeCys methylated to form Se-methylselenoCys or through the formation of Se-carboxymethyl-selenohomocysteine. Indeed, further study should be carried out on the determination of more Se species to explain the high Se hyperaccumulation in Cardamine sp. |
| Starting Page | 357 |
| Ending Page | 364 |
| Page Count | 8 |
| File Format | |
| ISSN | 10009426 |
| Journal | Chinese Journal of Geochemistry |
| Volume Number | 33 |
| Issue Number | 4 |
| e-ISSN | 19930364 |
| Language | English |
| Publisher | Science Press |
| Publisher Date | 2014-10-29 |
| Publisher Place | Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | Enshi Se hyperaccumulator Cardamine sp. Se speciation SeCys$_{2}$ Geochemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Geochemistry and Petrology |
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