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| Effects of zinc on cadmium uptake，transfer and root morphology of rice seedings under cadmium stress |
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| DOI：10.16768/j.issn.1004-874X.2017.05.016 |
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| Abstract: |
| The effects of 0.4mmol/L zinc on the absorption and root morphology of cadmium under cadmium
stress were studied in this experiment with Xiangwanxian 12 as the material. The results showed that root fresh
weight，root length，root surface area and root volume decreased significantly under Cd stress，and increased with the
increase of stress concentration and treatment time. The inhibition of each rootage indicatrixes was alleviated by the
treatment of 0.4 mmol/L Zn. Compared with Cd stress treatment，root fresh weight，root length，root surface area and
root volume increased by 1.8%-38.8%，-0.04%-25.0%，-0.05%-29.9% and -0.06%-28.3%，respectively. In the
short term，the total accumulation of rice seedling was 28.4%，24.9%，8.3%，respectively，which was significantly
different from that of 10，20 and 50μmol/L Cd treatment. However，under long-term（ 6d，9d） ，Zn had no
significant effect on the redistribution of Cd in rice seedlings. The addition of Zn significantly promoted the transport
of Cd to the shoots under Cd stress，and the transfer coefficient reached 0.21-0.28，which was radically different from
that of Cd stress alone. |
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