| 关海燕,屈琦琦,赵凡,王若鹏,阎尚博,董丽.‘夏日赞歌’景天(Sedum spurium ‘Summer Glory’)对铅的耐性和富集特征研究[J].农业环境科学学报,2019,38(2):290-296. |
| ‘夏日赞歌’景天(Sedum spurium ‘Summer Glory’)对铅的耐性和富集特征研究 |
| Lead tolerance and accumulation characteristics of the ‘Summer Glory’ Sedum spurium |
| 投稿时间：2018-04-08 修订日期：2018-06-27 |
| DOI：10.11654/jaes.2018-0457 |
| 中文关键词: Pb胁迫 ‘夏日赞歌’景天 耐性 富集特性 |
| 英文关键词: lead stress Sedum spurium ‘Summer Glory’ tolerance characteristics accumulation characteristics |
| 基金项目:国家林业局高抗逆性优良宿根花卉繁育及应用示范推广项目（2016[31]）；北京市共建项目专项 |
| 作者 | 单位 | E-mail | | 关海燕 | 花卉种质资源创新与分子育种北京市重点实验室, 国家花卉工程技术研究中心, 城乡生态环境北京实验室, 北京林业大学园林学院, 北京 100083 | | | 屈琦琦 | 花卉种质资源创新与分子育种北京市重点实验室, 国家花卉工程技术研究中心, 城乡生态环境北京实验室, 北京林业大学园林学院, 北京 100083 | | | 赵凡 | 花卉种质资源创新与分子育种北京市重点实验室, 国家花卉工程技术研究中心, 城乡生态环境北京实验室, 北京林业大学园林学院, 北京 100083 | | | 王若鹏 | 花卉种质资源创新与分子育种北京市重点实验室, 国家花卉工程技术研究中心, 城乡生态环境北京实验室, 北京林业大学园林学院, 北京 100083 | | | 阎尚博 | 中国林业科学研究院, 北京 100091 | | | 董丽 | 花卉种质资源创新与分子育种北京市重点实验室, 国家花卉工程技术研究中心, 城乡生态环境北京实验室, 北京林业大学园林学院, 北京 100083 | dongli@bjfu.edu.cn |
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| 中文摘要: |
| 为探究‘夏日赞歌’景天（Sedum spurium‘Summer Glory’）对铅（Pb）的耐受及富集能力，利用盆栽试验研究了不同Pb浓度0（CK）、250、500、1000、2000、4000、8000 mg·kg-1对‘夏日赞歌’景天的生长和生理特性的影响。结果表明，Pb处理浓度为0~4000mg·kg-1时，随Pb处理浓度的增加，‘夏日赞歌’景天地上部和根部生物量、丙二醛（MDA）含量和超氧化物歧化酶（SOD）活性呈上升趋势，植物络合素（PCs）含量呈先增后减趋势，且各处理PCs含量均大于CK。当处理浓度为8000 mg·kg-1时，MDA含量显著增加，地上部和根部生物量和SOD活性显著降低。‘夏日赞歌’景天地上部或根部Pb含量与土壤Pb含量均呈显著正相关，且根部Pb含量远大于地上部，根部Pb含量最大为604.13 mg·kg-1。综上所述，‘夏日赞歌’景天对Pb胁迫有较强的耐受和富集能力，可作为Pb污染土壤修复和绿化的候选物种。 |
| 英文摘要: |
| The goal of this study was to examine the growth and physiological characteristics of ‘Summer Glory’, Sedum spurium, under lead (Pb)stress 0 (CK), 250, 500, 1000, 2000, 4000 mg·kg-1, and 8000 mg·kg-1 to evaluate its capacity for Pb tolerance and accumulation. When the Pb concentration of the soil increased from 0 to 8000 mg·kg-1, the malondialdehyde (MDA)concentration continued to increase up to 60.39% higher than that of the control for the highest level of treatment (8000 mg·kg-1). The dry weight in the shoots and roots, superoxide dismutase (SOD)activities, and phytochelatins (PCs)concentration increased to the highest level at 4000 mg·kg-1 and 1000 mg·kg-1 concentrations, respectively, and were followed by a continuous decrease when the concentration increased. When compared to the control after 90 days of treatment, the dry weight in the shoots and roots, SOD activities and PCs concentration at the highest treatment level (8000 mg·kg-1)decreased by 33.13%, 55.88%, 4.59%, and 16.62%, respectively. The Pb concentration in the shoots and roots were significantly and positively correlated with the Pb concentration of the soil, while the translocation factor and bioconcentration factor were negatively correlated with the Pb concentration of the soil. In addition, the Pb concentration in the roots had the highest level at 604.13 mg·kg-1 and was much greater than that in the shoots. These results demonstrate that ‘Summer Glory’ has a strong tolerance and accumulation ability of Pb and can be considered as a candidate species for the phytoremediation and greening of Pb contaminated soil. |
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