| 砷-菲对蜈蚣草根部不同碳基团的影响 |
| 摘要点击 1170 全文点击 562 投稿时间：2016-04-12 修订日期：2016-07-10 |
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| 中文关键词 菲 砷 蜈蚣草 固态13C核磁共振 生物降解 |
| 英文关键词 phenanthrene arsenic Pteris vittata L. solid-state13C-NMR biodegradation |
| 作者 | 单位 | E-mail | | 廖晓勇 | 中国科学院地理科学与资源研究所, 环境损害与污染修复北京市重点实验室, 北京 100101 | liaoxy@igsnrr.ac.cn | | 龚雪刚 | 中国科学院地理科学与资源研究所, 环境损害与污染修复北京市重点实验室, 北京 100101
中国科学院大学, 北京 100049 | | | 阎秀兰 | 中国科学院地理科学与资源研究所, 环境损害与污染修复北京市重点实验室, 北京 100101 | | | 马旭 | 中国科学院地理科学与资源研究所, 环境损害与污染修复北京市重点实验室, 北京 100101 | | | 吴泽嬴 | 中国科学院地理科学与资源研究所, 环境损害与污染修复北京市重点实验室, 北京 100101 | |
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| 中文摘要 |
| 采用离体鲜根实验和固态13C核磁共振技术（13C-NMR）研究蜈蚣草根部对砷和菲的吸收特征及根部碳基团的影响作用. 结果表明，蜈蚣草根部在无蒸腾作用的条件下能够有效地吸收砷和菲，添加菲能够促进离体鲜根对砷的吸收，添加砷也可提高菲的吸收，与对照相比，菲提高了15%~53%. 蜈蚣草离体鲜根中以烷氧基C为主，羧基C比例最低，且主要为羧酸、酯和酰胺类羧基C，添加砷和菲会显著增加蜈蚣草离体鲜根中羧基C的比例. 蜈蚣草离体鲜根为应对砷和菲的胁迫形成了分子结构更为稳定和复杂的芳香类有机质，从而提高离体鲜根的抗性和适应性. |
| 英文摘要 |
| To ascertain absorption of arsenate and phenanthrene as well as their influence on carbon groups in excised roots of Pteris vittata L., the chemical structure of the carbon groups in excised roots was characterized by solid state13C-Nuclear Magnetic Resonance (13C-NMR). The results showed that the excised roots could effectively absorb As and PHE without transpiration, and PHE promoted As accumulation in the roots. Similarly, arsenate increased the adsorption of PHE by the excised roots, the concentration of PHE was increased by 15%-53% compared with CK. The carbon groups of the excised roots were dominated by O-alkyl C, the percentage of carboxyl C was the lowest, mainly composed of carboxylic acids, esters and amides. With the addition of As and PHE, the percentage of carboxyl C increased significantly. The more stable and complex aromatic organic matter was formed to improve the resistance and adaptability in excised roots of Pteris vittata L. under As and PHE stress. |
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