HAN Chao,SHEN Hai-yu,YE Jia,et al.Effect of Simulation of Cadmium Pollution on Growth，Cadmium Accumulation and Its Subcellular Distribution in Two Varieties of Brassica pekinensis Rupr.[J].Northern Horticulture,2014,38(10):9-12.
模拟镉污染对两个白菜品种生长、镉吸收累积及亚细胞分布的影响
- Title:
- Effect of Simulation of Cadmium Pollution on Growth，Cadmium Accumulation and Its Subcellular Distribution in Two Varieties of Brassica pekinensis Rupr.
- 文章编号:
- 1001-0009(2014)10-0009-04
- 分类号:
- S 634.1
- 文献标志码:
- A
- 摘要:
- 以“北京铁球小包”和“津青75”2个白菜品种为试材，通过室内土培试验，研究了模拟重金属镉（Cd）污染对邯郸市2个不同白菜品种的生长情况、Cd吸收累积特征及亚细胞分布规律的影响。结果表明：Cd浓度增加抑制了2个白菜品种的生长，在5 mg/kg Cd浓度污染下，与对照相比“北京铁球小包”和“津青75”的总干重分别降低了11.3%和40.12%，相对而言，“北京铁球小包”受抑程度低；2个白菜品种所吸收的Cd主要集中于根部，随Cd浓度增加，2个白菜品种对Cd的积累量均提高，在2个Cd污染浓度下，“北京铁球小包”对Cd的总积累量分别比“津青75”高52%和47%，且其根部对Cd的束缚量也较多；综合而言，2个白菜品种中，“北京铁球小包”对土壤Cd的富集能力较强，而其吸收的镉在细胞器中积累较少，且其生长受Cd污染影响较小，在土壤Cd的植物修复具有较强的应用潜力。
- Abstract:
- Taking two vaieties of Brassica pekinensis Rupr.‘Beijing Tieqiu Xiaobao’ and‘Jinqing 75’as materials，by soil test，the growth，cadmium(Cd) accumulation and its subcellular distribution in two vaieties of?Brassica pekinensis Rupr.were studied.The results showed that the increasing of Cd concentration inhibited the growth of ?B.pekinensis，and compared with the control，the total dry weights of variety ‘Beijing Tieqiu Xiaobao’ and ‘Jinqing 75’ were reduced by 11.3% and 40.12% at 5 mg/kg Cd，respectively.Comparatively，the inhibited degree of Cd on variety ‘Beijing Tieqiu Xiaobao’ was lower than variety of ‘Jinqing 75’.The absorbed Cd was mainly accumulated in roots of the two varieties of B.pekinensis.Absorbed dose was increased with the increasing of Cd application rate.Moreover，the total Cd accumulation in vatiety of ‘Beijing Tieqiu Xiaobao’ were 52% and 47% higher than variety of ‘Jinqing 75’，respectively，under 1.0 and 5.0 mg/kg Cd.The distribution of Cd was more in roots of ‘Beijing Tieqiu Xiaobao’.On the whole，Cd accumulation in variety of ‘Beijing Tieqiu Xiaobao’ was higher，the distribution rate in cell organ was lower and the inhibited degree in growth was lower than those in variety of ‘Jinqing 75’.Therefore，the variety of ‘Beijing Tieqiu Xiaobao’ had stronger utilization potentiality in phytoremediation of soil Cd pollution.
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备注/Memo
第一作者简介：韩超（1978-），女，博士，副教授，现主要从事植物生理生态等研究工作。E-mail：chaohan@126.com.