| 赵 萍1，瞿华香2，张玉烛3.锌对镉胁迫下水稻幼苗镉吸收转运及根系形态的影响[J].广东农业科学,2017,44(5):99-105 |
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锌对镉胁迫下水稻幼苗镉吸收转运及根系形态的影响 |
| 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 |
| 中文关键词: 水稻幼苗 锌 镉 胁迫 吸收转运 根系形态 |
| 英文关键词: rice seedings zinc cadmium stress absorption and transfer root morphology |
| 基金项目:湖南省财政专项（湘财农指［2016］151 号） |
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| 摘要点击次数: 1893 |
| 全文下载次数: 871 |
| 中文摘要: |
| 以湘晚籼12 号为材料，采用水培试验，研究了0.4 mmol/L 锌对镉胁迫下水稻镉吸收转运及根
系形态的影响。结果表明：镉胁迫下，水稻幼苗根系生长受到极显著抑制，根系鲜重、根系总长、根表面
积、根体积明显下降，随胁迫浓度增加和处理时间延长，抑制程度加重；0.4 mmol/L 锌对镉胁迫有一定缓解
作用，可不同程度减轻对水稻幼苗的毒害，促进根系各指标的增加，与不同程度镉胁迫处理相比，锌对水
稻幼苗根系鲜重、根系总长、根表面积、根体积分别增加1.8%～38.8%、-0.04%～25.0%、-0.05%～29.9%、
-0.06%～28.3%；Zn 能减少镉胁迫下水稻对Cd 的吸收积累量，在短期（3d）内，加Zn 处理较10、20、
50 μmol/L Cd 胁迫处理，水稻幼苗总积累量分别减少28.4%、24.9%、8.3%，差异显著，但长期（6d、
9d）情况下，降Cd 处理效果不显著；加Zn 处理极显著促进了胁迫情况下Cd 向地上部运输，转运系数达
0.21～0.28，较单纯Cd 胁迫处理差异极显著，Cd 在水稻幼苗体内的再分配差异显著。 |
| 英文摘要: |
| 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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