| 豆瓣菜对Cd 的生理反应及其Cd 积累的
研究 |
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| 引用本文： | 韩承华,周增辉,张娜,江解增.豆瓣菜对Cd 的生理反应及其Cd 积累的
研究[J].中国蔬菜,2013,1(24):16-21. |
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| 作者姓名： | 韩承华 周增辉 张娜 江解增 |
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| 作者单位： | 扬州大学水生蔬菜研究室，江苏扬州 225009 |
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| 基金项目： | 江苏省农业三项工程项目〔sx（2011）290〕 |
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| 摘 要： | 为了解Cd 对豆瓣菜生长的影响，以英国大叶豆瓣菜为试验材料，在营养液栽培条件下，研
究了不同浓度Cd 处理下，豆瓣菜农艺性状、产量、根系活力、净光合速率（Pn）、抗氧化酶活性、丙二
醛（MDA）含量、植物络合素（PCs）含量，以及豆瓣菜不同部位Cd 含量的变化。结果表明：较低浓度
的Cd 处理就会影响豆瓣菜的生长，表现为MDA 含量升高，高浓度Cd 处理还会导致根系活力和Pn 的降低。
SOD、POD、CAT 和PCs 在缓解Cd 毒害中具有协同作用，但低浓度Cd 胁迫下以PCs 的螯合作用为主，
随Cd 浓度的增加变为以SOD、POD、CAT 的抗氧化作用为主。豆瓣菜易积累Cd，当营养液中Cd 达到0.20
mg·L-1 时，豆瓣菜Cd 含量即已超标。认为豆瓣菜是一种Cd 敏感型蔬菜，生产中应特别注意Cd 的污染。
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| 关 键 词： | 豆瓣菜 生长 Cd 积累 生理反应 |
Studies on Physiological Response of Watercress to Cd Stress and Its Cd Accumulation |
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| HAN Cheng-Hua,ZHOU Zeng-Hui,ZHANG Na,JIANG Jie-Zeng.Studies on Physiological Response of Watercress to Cd Stress and Its Cd Accumulation[J].China Vegetables,2013,1(24):16-21. |
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| Authors: | HAN Cheng-Hua ZHOU Zeng-Hui ZHANG Na JIANG Jie-Zeng |
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| Institution: | Institute of Aquatic Vegetable Research， Yangzhou University， Yangzhou 225009， Jiangsu， China |
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| Abstract: | A hydroponic experiment was carried out to study the effects of Cd on the growth of watercress（
Nasturtium officinale R. Br.）．The indexes under treatments of different Cd concentration，
such as agronomic characters，yield，root activity，net photosynthetic rate（ Pn），antioxidant enzyme
activity and the concentration of malondialdehyde（ MDA），phytochelatins（ PCs） and Cd contents
changes at different parts of watercress were studied. The results showed that low Cd concentration would
influence watercress growth，i.e. the accumulation of MDA would rise，while high Cd concentration
would lead to the decline of root activity and Pn．Antioxidases and PCs played a cooperative role in alleviating
Cd toxicity. But the alleviation was dominated by PCs chelation under the condition of low Cd
concentration，while it would be dominated by the antioxygenation of SOD，POD，CAT along with the
increase of Cd concentration. Cd is easily accumulated in watercress．The Cd concentration in edible
parts of watercress had exceeded the limit value of national standards，when the concentration of Cd in
the nutrient solution reached 0.20 mg·L-1．In conclusion，watercress is a vegetable of Cd-sensitive
type，more attentions should be paid on Cd pollution during its production. |
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| Keywords: | Watercress Growth Cd accumulation Physiological responses |
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