| Pb胁迫对金丝草和柳叶箬生长及富Pb特征的影响 |
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| 引用本文： | 侯晓龙,陈加松,刘爱琴,蔡丽平.Pb胁迫对金丝草和柳叶箬生长及富Pb特征的影响[J].福建农林大学学报(自然科学版),2012,41(3):286-290. |
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| 作者姓名： | 侯晓龙 陈加松 刘爱琴 蔡丽平 |
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| 作者单位： | 福建农林大学林学院,福建福州,350002 |
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| 基金项目： | 国家公益性行业科研专项，福建省自然科学基金资助项目 |
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| 摘 要： | 以本课题组前期研究筛选出的2种Pb潜在超富集植物金丝草和柳叶箬为研究对象,通过室内模拟胁迫水培试验,研究Pb胁迫下2种植物的生长及Pb富集规律.结果表明:金丝草和柳叶箬均对Pb具有较强的耐性,可忍耐最高Pb胁迫浓度分别达1000和1500 mg·L-1;随Pb胁迫浓度的增高,2种植物地上和地下部分的Pb含量均呈现先增大后减少的规律;金丝草地上和地下部分的Pb含量在Pb胁迫浓度为750 mg·L-1时均达最大,分别为4639.4和5467.2 mg·kg-1;柳叶箬地上和地下部分的Pb含量在Pb胁迫浓度为1000 mg·L-1时达最大,分别为6828.4和9034.6 mg·kg-1;不同Pb胁迫浓度下,2种植物转运系数的变化范围为0.57-1.14;在Pb胁迫浓度为250 mg·L-1时,金丝草对Pb的转运系数大于1,且地上部分的Pb含量超过1000 mg·kg-1,达到Pb超富集植物的标准.
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| 关 键 词： | Pb超富集植物 金丝草 柳叶箬 Pb胁迫 富集 |
Growth response and accumulation characteristics of Pogonatherum crinitum and Lsache globosa under the stress of lead |
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| HOU Xiao-long
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CHEN Jia-song
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LIU Ai-qin
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CAI Li-ping.Growth response and accumulation characteristics of Pogonatherum crinitum and Lsache globosa under the stress of lead[J].Journal of Fujian Agricultural and Forestry University,2012,41(3):286-290. |
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| Authors: | HOU Xiao-long CHEN Jia-song LIU Ai-qin CAI Li-ping |
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| Institution: | (College of Forestry,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China) |
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| Abstract: | Two new potential lead-hyperaccumulators Pogonatherum crinitum and Lsache globosa were firstly found in Youxi and Liancheng mining areas of Fujian Province.Their growth response and accumulation to Pb were studied by Pb stress simulation hydroponic experiment.The results showed that the maximum tolerances of Pb stress concentration were 1000 mg·L-1 of P.crinitum and 1500 mg·L-1 of L.globosa.The Pb concentration in aboveground and roots of P.crinitum and L.globosa firstly increased and then declined with enhancing of Pb stress concentration.The maximum Pb concentrations in aboveground and roots of P.crinitum were 4639.4 and 5467.2 mg·kg-1 respectively under Pb stress concentration 750 mg·L-1.The maximum Pb concentration of L.globosa in roots was 6828.4 and 9034.6 mg·kg-1 in aboveground under Pb stress concentration 1000 mg·L-1.The transport coefficient of P.crinitum exceeded 1 under Pb stress concentration 250 mg·L-1,but it was lower than 1 under other stress concentrations.The transport coefficient variation range of P.crinitum and L.globosa was 0.57-1.14.P.crinitum and L.globosa have high tolerance and accumulation ability to Pb,and they are suitable to the restoration of Pb pollution. |
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| Keywords: | lead-hyperaccumulator Pogonatherum crinitum Lsache globosa Pb stress accumulation |
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