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| Screening and tolerance comparison of high and low cadmium accumulating cabbage cultivars in a typical black soil |
| Received:September 26, 2019 |
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| KeyWord:black soil;cadmium(Cd);high-accumulation cultivar;low-accumulation cultivar;cabbage;Cd tolerance |
| Author Name | Affiliation | E-mail | | CHEN Chen | School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | ZHU Yuan-chen | School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | LA Yue-peng | School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | ZHANG Si-jia | School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | DING Gong-yao | School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | | | YAN Lei | School of Resources and Environment, Northeast Agricultural University, Harbin 150030, China | 1071913992@qq.com |
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| Abstract: |
| To investigate cadmium(Cd)sensitivity and Cd accumulation characteristics of different cabbage(Brassica pekinensis L.)cultivars in a typical black soil environment, Cd-tolerant cultivars characteristics of high and low Cd accumulation were selected. In this study, pot experiments were conducted on 20 common cabbage cultivars from Northeast China to study the dose-effect and Cd accumulation characteristics of different cabbage cultivars under Cd stress. In addition, the effects of Cd concentration and oxidative damage on cultivars with high and low Cd accumulation were assessed. The results showed that the dose-effect differences among the tested cultivars were significant. JF and BCCRQJ were the two cultivars with the strongest Cd tolerance, with tolerance thresholds of 1.204 mg·kg-1 and 1.036 mg·kg-1, respectively. At high Cd concentrations(≥ 0.6 mg·kg-1), the Cd content in the leaves of JF was the lowest, with root-to-leaf translocation factor(TF)and bioconcentration factor(BCF)of less than 1. Meanwhile, BCCRQJ had the highest extraction rate. The Cd content in the soil was positively correlated with root and leaf accumulation of Cd, and hydrogen peroxide(H2O2), superoxide anion (O2-), malondialdehyde(MDA), and free proline(FPRO)levels in JF and BCCRQJ, and it was negatively correlated with the extraction rate(P<0.05)of the two cultivars. Moreover, the degree of oxidative damage in BCCRQJ was higher than that in JF at high Cd concentrations. In conclusion, JF is a low-accumulation cultivar with extremely high Cd tolerance, while BCCRQJ is a high-accumulation cultivar with slightly lower Cd tolerance than that of JF. |
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