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Accumulation and speciation of selenium in Cardamine sp. in Yutangba Se Mining Field, Enshi, China
| Content Provider | Semantic Scholar |
|---|---|
| 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 SeCys2 with the highest concentration in seeds; up to 1081 mg/kg as Se. In contrast, SeCys2 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 | PDF HTM / HTML |
| DOI | 10.1007/s11631-014-0698-7 |
| Volume Number | 33 |
| Alternate Webpage(s) | http://english.gyig.cas.cn/pu/papers_CJG/201410/P020141027560643922421.pdf |
| Alternate Webpage(s) | https://page-one.springer.com/pdf/preview/10.1007/s11631-014-0698-7 |
| Alternate Webpage(s) | https://doi.org/10.1007/s11631-014-0698-7 |
| Journal | Chinese Journal of Geochemistry |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
